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-v2Code,Matrix,Analyte,Analyte Code,Extraction Name,Extraction Name Code,Extraction reagents/formulation,Extraction Ratio (Soil:Extractant),Extraction Basis,Extraction Time,Analyte Measurement,Analyte Measurement Code,Observation Category,Reporting Unit,Reporting Unit Code,Acceptance,Status,Organization,Citation,Notes,Row Added Date,Row Changed Date,Change Comment
-L_MODV2_SOIL_ACEN_001,SOIL,ACE nitrogen (soil protein index),ACEN,Soil Protein,SOIL_PROTEIN,Autoclaved Citrate Extractable,1:7,m/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Schindelbeck, 2016",,13-Nov-24,,
-L_MODV2_SOIL_ACIDT_001,SOIL,acidity,ACIDT,Barium Chloride,BARIUM_CHLORIDE,Barium Chloride titration,1:60,,120 min,H+ ISE,H_ISE,MEASURED,mEq/100g,mEq1hg-1,OFFICIAL,VALID,SSSA,"Hendershot, W. and M. Duquette. 1986. A simple barium chloride method for determining cation exchange capacity and exchangeable cations. Soil Science Society of America journal, 50(3), pp.605-608.",,13-Nov-24,,
-L_MODV2_SOIL_ACIDT_002,SOIL,acidity,ACIDT,,,,,,,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ASAR_001,SOIL,adjusted sodium adsorption ratio,ASAR,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_001,SOIL,aggregate stability,ASTAB,Image recognition,IMAGE_RECOGNITION,Image recognition,,,,Spectral analysis,SPECTRAL_ANALYSIS,MEASURED,%,prcnt,OFFICIAL,VALID,Soil Health Institute,"Farjardo,et al., 2016",,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_002,SOIL,aggregate stability,ASTAB,Incubation,INCUBATION,Slake test,N/A,,,Visual,VISUAL,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_003,SOIL,aggregate stability,ASTAB,Wet Sieving,WET_SIEVING,Eijkamp method,1:5,v/v,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,Soil Health Institute,"Kemper and Rosenau, 1986. Aggregate Stability and Size Distribution,  Methods of Soil Analysis: Part 1 Physical and Mineralogical Methods, 5.1, Second Edition, Chapter 17",,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_004,SOIL,aggregate stability,ASTAB,Wet Sieving,WET_SIEVING,Wet seive,1:5,v/v,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,Soil Health Institute,"Franzluebbers, et al., 2000",,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_005,SOIL,aggregate stability,ASTAB,Slaking From Raindrop Impact,SLAKING_FROM_RAINDROP_IMPACT,Deionized Water,1:30,Slaking,5 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH03-Wet-Aggregate-Stability-SOP-4-2022.pdf,,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_006,SOIL,aggregate stability,ASTAB,Volumetric Aggergrate Stability Test,VOLUMETRIC_AGGERGATE_STABILITY_TEST,Deionized Water,N/A,Calculation,3 min,Volume,Volume,MEASURED,%,prcnt,PROPRIETARY,VALID,Woods End Laboratories,N/A,,13-Nov-24,,
-L_MODV2_SOIL_ASTAB_007,SOIL,aggregate stability,ASTAB,Image recognition,IMAGE_RECOGNITION,Image recognition,N/A,Slaking,10 min,Calculation,CALCULATION,CALCULATION,ratio,ratio,OFFICIAL,VALID,Soil Health Institute,https://soilhealthinstitute.org/app/uploads/2022/06/SOP_AggStability_ImageRecogn_simplified_v1.2.pdf,,13-Nov-24,,
-L_MODV2_SOIL_AL_001,SOIL,aluminum,AL,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,PROVISIONAL,VALID,,https://www.naptprogram.org/files/napt/western-states-method-manual-2005.pdf,,13-Nov-24,,
-L_MODV2_SOIL_AL_002,SOIL,aluminum,AL,Ammonium Oxalate,AMMONIUM_OXALATE,Acid Ammonium Oxalate,,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,CSSS,"Ross, G. J. and Wang C. 1993. Extractable Al, Fe, Mn, and Si. pp. 239-246. In: Carter, M. R. (ed), Soil Sampling and Methods of Analysis, Canadian Society of Soil Sciences, Lewis Publishers, Ann Arbor, MI.",,13-Nov-24,,
-L_MODV2_SOIL_AL_003,SOIL,aluminum,AL,"Aqua Regia, Modified",AQUA_REGIA_MODIFIED,Reverse Aqua Regia (1:3 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES,ICP-OES,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_AL_004,SOIL,aluminum,AL,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_AL_005,SOIL,aluminum,AL,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,%,prcnt,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_AL_006,SOIL,aluminum,AL,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_AL_007,SOIL,aluminum,AL,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_AL_008,SOIL,aluminum,AL,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_AL_009,SOIL,aluminum,AL,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_AL_010,SOIL,aluminum,AL,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_AL_011,SOIL,aluminum,AL,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_AL_012,SOIL,aluminum,AL,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_AL_013,SOIL,aluminum,AL,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_AL_014,SOIL,aluminum,AL,Nitric Acid,NITRIC_ACID,HN03,,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_AL_015,SOIL,aluminum,AL,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_AL_016,SOIL,aluminum,AL,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_AL_017,SOIL,aluminum,AL,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Field Capacity,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_AL_018,SOIL,aluminum,AL,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_AL_019,SOIL,aluminum,AL,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_AL_020,SOIL,aluminum,AL,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_AL_021,SOIL,aluminum,AL,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_AL_022,SOIL,aluminum,AL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_AL_023,SOIL,aluminum,AL,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_AL_024,SOIL,aluminum,AL,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:5,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,13-Nov-24,,
-L_MODV2_SOIL_AL_025,SOIL,aluminum,AL,Potassium Chloride,POTASSIUM_CHLORIDE,0.2 M CaCl2,1:5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,ASPAC,,,13-Nov-24,,
-L_MODV2_SOIL_AMINON_001,SOIL,amino nitrogen,AMINON,Boric Acid,BORIC_ACID,NH2 Release (Boric Acid),,,,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NH4_001,SOIL,ammonium,NH4,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_NH4_002,SOIL,ammonium,NH4,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_NH4_003,SOIL,ammonium,NH4,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_001,SOIL,ammonium-nitrogen,NH4N,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_002,SOIL,ammonium-nitrogen,NH4N,Slurry,SLURRY,Deionized Water,1:1,m/m,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NH4N_003,SOIL,ammonium-nitrogen,NH4N,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Communications in Soil Science and Plant Analysis 41(12):1513-1523, DOI:10.1080/00103624.2010.482173",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_004,SOIL,ammonium-nitrogen,NH4N,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NH4N_005,SOIL,ammonium-nitrogen,NH4N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_006,SOIL,ammonium-nitrogen,NH4N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Diff - Conductivity,DIFF-CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_007,SOIL,ammonium-nitrogen,NH4N,Potassium Chloride,POTASSIUM_CHLORIDE,0.5 M KCl,1:5,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NH4N_008,SOIL,ammonium-nitrogen,NH4N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,1:5,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NH4N_009,SOIL,ammonium-nitrogen,NH4N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SB_001,SOIL,antimony,SB,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_AS_001,SOIL,arsenic,AS,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_AS_002,SOIL,arsenic,AS,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_AS_003,SOIL,arsenic,AS,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_AS_004,SOIL,arsenic,AS,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_AS_005,SOIL,arsenic,AS,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_ARYLS_001,SOIL,arylsulfatase,ARYLS,,,Assay incubation,1:10,v/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,nmol/h/mg,nmol1hr-1mg-1,OFFICIAL,VALID,Soil Health Institute,"Klose, et al., 2011",,13-Nov-24,,
-L_MODV2_SOIL_AWHC_001,SOIL,available water holding capacity,AWHC,Slurry,SLURRY,Ceramic plate method measured at -33 kPa (-10 kPa for sandy soils) and -1500 kPa,1:4,v/v,,Gravimetric,GRAVIMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Klute, 1986",,13-Nov-24,,
-L_MODV2_SOIL_BA_001,SOIL,barium,BA,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_BA_002,SOIL,barium,BA,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_BA_003,SOIL,barium,BA,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_BA_004,SOIL,barium,BA,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_BS_001,SOIL,base saturation,BS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_CABS_001,SOIL,base saturation - Ca,CABS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_CAMGRATIO_001,SOIL,Ca:Mg ratio,CAMGRATIO,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_CAANDMGBS_001,SOIL,base saturation - Ca+Mg,CAANDMGBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_HBS_001,SOIL,base saturation - H,HBS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_KBS_001,SOIL,base saturation - K,KBS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_CAMGRATIO_001,SOIL,Ca:Mg ratio,CAMGRATIO,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_KMGRATIO_001,SOIL,K:Mg ratio,KMGRATIO,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_MGBS_001,SOIL,base saturation - Mg,MGBS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_WSCN_001,SOIL,water soluble C:N ratio,WSCN,Water / Reciprocating Shaker / Centrifuge,WATER_RECIPROCATING_SHAKER_CENTRIFUGE,Deionized water,1:20,m/m,10 min,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,VALID,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,13-Nov-24,,
-L_MODV2_SOIL_NABS_001,SOIL,base saturation - Na,NABS,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,%,prcnt,OFFICIAL,VALID,SERA-6,https://aesl.ces.uga.edu/sera6/PUB/MethodsManualFinalSERA6.pdf,,13-Nov-24,,
-L_MODV2_SOIL_CAMGBS_001,SOIL,base saturation - Ca+Mg,CAMGBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,INVALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_BGLUCO_001,SOIL,beta-glucosidase,BGLUCO,,,Assay incubation,1:5,v/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Tabatabai, et al., 1994",,13-Nov-24,,
-L_MODV2_SOIL_HCO3_001,SOIL,bicarbonate,HCO3,Slurry,SLURRY,"Soil saturated with DI water, subsequent extraction and retained for analysis",N/A,m/m,4 hrs,ICP-OES,ICP-OES,CALCULATION,meq/L,meq1l-1,PROVISIONAL,VALID,,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_HCO3_002,SOIL,bicarbonate,HCO3,Slurry,SLURRY,"Soil saturated with DI water, subsequent extraction and retained for analysis",N/A,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.3",,13-Nov-24,,
-L_MODV2_SOIL_HCO3_003,SOIL,bicarbonate,HCO3,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_HCO3_004,SOIL,bicarbonate,HCO3,Slurry,SLURRY,Dionized Water,1:1,v/v,,Titration,TITRATION,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_HCO3_005,SOIL,bicarbonate,HCO3,,,,,,,,,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_B_001,SOIL,boron,B,Calcium Chloride,CALCIUM_CHLORIDE,"Hot CaCl2 (NCERA, SERA, WERA.. All three different concentration of CaCl2)",1:10,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_002,SOIL,boron,B,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_B_003,SOIL,boron,B,Slurry,SLURRY,"Hot Water  (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in DI water. Make to 1 L volume with high quality, DI water. Curcumin method for spctrophotometer, Add 4mL of curcumin-oxide to 2mL extract. Evaporate on water bath. Add 25 mL alcohol.)",1:2,m/v,Boil for 5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,13-Nov-24,,
-L_MODV2_SOIL_B_004,SOIL,boron,B,Slurry,SLURRY,"Hot Water (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in deionized water. Make to 1 L volume with high quality, deionized water. )",1:2,m/v,Boil for 5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,13-Nov-24,,
-L_MODV2_SOIL_B_005,SOIL,boron,B,Slurry,SLURRY,Deionized Water Extraction,1:1,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_006,SOIL,boron,B,Slurry,SLURRY,"Deionized Water Extraction (Deionized water, or substitue 0.01 M CaCl2 to reduce turbidity in the filtrate. )",1:2,m/v,Boil for 10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_007,SOIL,boron,B,Slurry,SLURRY,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",1:5,m/v,Hot-water shaking bath for 30 minutes at 80C,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_008,SOIL,boron,B,Slurry,SLURRY,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",1:5,m/v,Hot-water shaking bath for 30 minutes at 80C,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_009,SOIL,boron,B,Slurry,SLURRY,Deionized Water Extraction,1:20,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_B_010,SOIL,boron,B,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",N/A,m/v,180 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.5",,13-Nov-24,,
-L_MODV2_SOIL_B_011,SOIL,boron,B,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_B_012,SOIL,boron,B,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_B_013,SOIL,boron,B,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_B_014,SOIL,boron,B,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_B_015,SOIL,boron,B,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_B_016,SOIL,boron,B,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_B_017,SOIL,boron,B,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_B_018,SOIL,boron,B,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_B_019,SOIL,boron,B,Nitric Acid,NITRIC_ACID,Nitric Acid,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_B_020,SOIL,boron,B,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_B_021,SOIL,boron,B,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_B_022,SOIL,boron,B,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs / 16 hrs,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_B_023,SOIL,boron,B,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:5,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,13-Nov-24,,
-L_MODV2_SOIL_BPH_001,SOIL,buffer pH,BPH,Adams-Evans,ADAMS-EVANS,"Adams-Evans: 1.0 M KCl, 0.14 M p-nitrophenol + 0.24 M boric acid, pH 8.00",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,13-Nov-24,,
-L_MODV2_SOIL_BPH_002,SOIL,buffer pH,BPH,"Adams-Evans, Modified",ADAMS-EVANS_MODIFIED,"Modified Adams-Evans:  1.0 M KCl + 0.22 M KH2PO4 + 0.24 M boric acid, pH 8.00",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,13-Nov-24,,
-L_MODV2_SOIL_BPH_003,SOIL,buffer pH,BPH,Calculation,CALCULATION,Regressed soil Sikora Buffer pH,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,S.U.,su,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_BPH_004,SOIL,buffer pH,BPH,Mehlich Buffer,MEHLICH_BUFFER,"Mehlich: 0.043 M acetic acid + 0.034 M triethanolamine + 0.8 M NH4Cl, 0.08 M BaCl2 + 0.08 M Na glycerophosphate, pH 6.60",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 2.",,13-Nov-24,,
-L_MODV2_SOIL_BPH_005,SOIL,buffer pH,BPH,"Mehlich Buffer, Modified",MEHLICH_BUFFER_MODIFIED,"Mod Mehlich:  0.043 M acetic acid + 0.034 M triethanolamine + 0.8 M NH4Cl, 0.08 M CaCl2.2 H2O + 0.08 M Na glycerophosphate, pH 6.60",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.6",,13-Nov-24,,
-L_MODV2_SOIL_BPH_006,SOIL,buffer pH,BPH,Moore-Sikora,MOORE-SIKORA,"Moore-Sikora: 1.0 M KCl + 0.035 M MES + 0.13 M MOPS + 0.21 M boric acid, pH 7.92",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,13-Nov-24,,
-L_MODV2_SOIL_BPH_007,SOIL,buffer pH,BPH,Sikora 1,SIKORA_1,"Sikora 1:  2.0 M KCl + 0.089M acetic acid + 0.031M MES + 0.014 M imidazole + 0.070 M triethanolamine, pH of 7.70",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.4",,13-Nov-24,,
-L_MODV2_SOIL_BPH_008,SOIL,buffer pH,BPH,Sikora 2,SIKORA_2,"Sikora 2: 1.0 M KCl + 0.089 M acetic acid + 0.031 M MES + 0.014 M imidazole + 0.070 M triethanolamine, pH 7.53",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.5",,13-Nov-24,,
-L_MODV2_SOIL_BPH_009,SOIL,buffer pH,BPH,SMP,SMP,"SMP: 0.013 M p-nitrophenol + 0.015M K2CrO4 + 0.36 M CaCl2 + 0.0126 M Ca(CO2CH3)2, and 0.019 M triethanolamine, pH of 7.50",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,13-Nov-24,,
-L_MODV2_SOIL_BPH_010,SOIL,buffer pH,BPH,Woodruff,WOODRUFF,"Woodruff:  0.063 M Ca(CH3COOH)2 + 0.086 M p-nitrophenol + 0.072M salicylic acid + 0.031 M NaOH, pH 7.00 ",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SSSA,"Woodruff, C. M. 1947. Soil Sci. Soc. Amer. Proc. 12:141-142.",,13-Nov-24,,
-L_MODV2_SOIL_BPH_011,SOIL,buffer pH,BPH,"Woodruff, Modified",WOODRUFF_MODIFIED,"Modified Woodruff: 0.063 M Ca(CH3COH) + 0.054 M Ca(OH)2 + 0.086 M p-nitrophenol + 0.072M salicylic acid, pH 7.00 ",1:2,v/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 4, pp 4.5-4.6.",,13-Nov-24,,
-L_MODV2_SOIL_BD_001,SOIL,bulk density,BD,Clod,CLOD,,,,,,,MEASURED,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_BD_002,SOIL,bulk density,BD,Coarse,COARSE,,,,,,,MEASURED,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_BD_003,SOIL,bulk density,BD,Core Extraction,CORE_EXTRACTION,"Core method: diameter to be determined, (most likely 2-inch or 5.08 cm)",1:5,m/v,,Gravimetric,GRAVIMETRIC,MEASURED,g/cm3,g1[cm3]-1,OFFICIAL,VALID,Soil Health Institute,"Blake and Hartge, 1986",,13-Nov-24,,
-L_MODV2_SOIL_BD_004,SOIL,bulk density,BD,Fine,FINE,,,,,,,MEASURED,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_BD_005,SOIL,bulk density,BD,Scoop,SCOOP,,,,,,,MEASURED,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_BD_006,SOIL,bulk density,BD,,,,,,,,,MEASURED,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KMGRATIO_001,SOIL,K:Mg ratio,KMGRATIO,Alcohol Prewash/Ammonium Acetate,ALCOHOL_PREWASH_AMMONIUM_ACETATE,,1:20,m/v,15 min,ICP-OES,ICP-OES,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,13-Nov-24,,
-L_MODV2_SOIL_CAMGKRATIO_001,SOIL,Ca+Mg:K ratio,CAMGKRATIO,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES,ICP-OES,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_CAMGBS_001,SOIL,base saturation - Ca:Mg,CAMGBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CAMGBS_002,SOIL,base saturation - Ca:Mg,CAMGBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,INVALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CAEMGP_001,SOIL,Ca + exchangable Mg,CAEMGP,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_KMGBS_001,SOIL,base saturation - K:Mg,KMGBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MGKBS_001,SOIL,base saturation - Mg:K,MGKBS,Mehlich 3 ,CALCULATION,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CNRATIO_001,SOIL,C:N ratio,CNRATIO,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CNRATIO_002,SOIL,C:N ratio,CNRATIO,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Combustion Analyzer,COMBUSTION_ANALYZER,CALCULATION,ratio,ratio,OFFICIAL,VALID,SSSA,,,13-Nov-24,,
-L_MODV2_SOIL_CNRATIO_003,SOIL,C:N ratio,CNRATIO,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,OFFICIAL,VALID,SSSA,,,13-Nov-24,,
-L_MODV2_SOIL_CNRATIO_004,SOIL,C:N ratio,CNRATIO,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Haney Method,HANEY_METHOD,CALCULATION,ratio,ratio,OFFICIAL,VALID,SSSA,,,13-Nov-24,,
-L_MODV2_SOIL_CAKRATIO_001,SOIL,Ca:K ratio,CAKRATIO,,,,,,,,,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CD_001,SOIL,cadmium,CD,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_CD_002,SOIL,cadmium,CD,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CD_003,SOIL,cadmium,CD,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CD_004,SOIL,cadmium,CD,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CD_005,SOIL,cadmium,CD,EPA 6010B,EPA_6010B,,,m/v,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CD_006,SOIL,cadmium,CD,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CD_007,SOIL,cadmium,CD,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CD_008,SOIL,cadmium,CD,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CD_009,SOIL,cadmium,CD,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CD_010,SOIL,cadmium,CD,DTPA,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",1:2,m/v,120 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,13-Nov-24,,
-L_MODV2_SOIL_CA_001,SOIL,calcium,CA,Alcohol Prewash/Ammonium Acetate,ALCOHOL_PREWASH_AMMONIUM_ACETATE,,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_002,SOIL,calcium,CA,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_CA_003,SOIL,calcium,CA,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_CA_004,SOIL,calcium,CA,Ammonium Acetate,AMMONIUM_ACETATE,1.0 N Ammonium Acetate buffered to pH 8.5,1:10,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,13-Nov-24,,
-L_MODV2_SOIL_CA_005,SOIL,calcium,CA,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_006,SOIL,calcium,CA,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl w/ prewash,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_007,SOIL,calcium,CA,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_008,SOIL,calcium,CA,Calcium Index,CALCIUM_INDEX,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),,,,,,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_009,SOIL,calcium,CA,Calculation,CALCULATION,Mehlich 3 to Ammonium Acetate,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_010,SOIL,calcium,CA,Slurry,SLURRY,Deionized Water,1:1,m/v,,ICP-OES,ICP-OES,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_011,SOIL,calcium,CA,Slurry,SLURRY,Deionized Water,1:20,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_012,SOIL,calcium,CA,Slurry,SLURRY,Deionized Water,5:1,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_013,SOIL,calcium,CA,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CA_014,SOIL,calcium,CA,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_CA_015,SOIL,calcium,CA,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_CA_016,SOIL,calcium,CA,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_CA_017,SOIL,calcium,CA,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_CA_018,SOIL,calcium,CA,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_CA_019,SOIL,calcium,CA,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_CA_020,SOIL,calcium,CA,Mehlich 3 ,MEHLICH_3,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_021,SOIL,calcium,CA,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CA_022,SOIL,calcium,CA,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CA_023,SOIL,calcium,CA,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_CA_024,SOIL,calcium,CA,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_CA_025,SOIL,calcium,CA,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_026,SOIL,calcium,CA,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CA_027,SOIL,calcium,CA,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_028,SOIL,calcium,CA,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CA_029,SOIL,calcium,CA,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CA_030,SOIL,calcium,CA,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl,,m/v,,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CA_031,SOIL,calcium,CA,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CA_032,SOIL,calcium,CA,Truog,TRUOG,"Truog, 0.002N H2S04 buffered with NH4HS04, pH 3.0",1:200,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CACO3_001,SOIL,calcium carbonate,CACO3,Acetic Acid,ACETIC_ACID,Acetic Acid,,,,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CACO3_002,SOIL,calcium carbonate,CACO3,Ammonium Oxalate,AMMONIUM_OXALATE,Acid Ammonium Oxalate,,,,Titration,TITRATION,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CACO3_003,SOIL,calcium carbonate,CACO3,Pressure Calcimeter,PRESSURE_CALCIMETER,Hydrochloric Acid,1:2.5,m,,CO2 Displacement,CO2_DISPLACEMENT,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Microbiological and Biochemical Properties, 5.2, 1994.  (91-7)",,13-Nov-24,,
-L_MODV2_SOIL_CACO3_004,SOIL,calcium carbonate,CACO3,Titration,TITRATION,"1.0 N HCl, Titration with 1.0 N NaOH",,,,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.3",,13-Nov-24,,
-L_MODV2_SOIL_CACO3_005,SOIL,calcium carbonate,CACO3,Weight Loss,WEIGHT_LOSS,"3.0 N HCl, Weight Loss CO2",2:10 to 5:10,m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-10.20",,13-Nov-24,,
-L_MODV2_SOIL_CACO3_006,SOIL,calcium carbonate,CACO3,Weight Loss,WEIGHT_LOSS,"1.0 N HCl, Pressure Transducer",1:1,m,120 min,Pressure Ttransducer,PRESSURE_TRANSDUCER,MEASURED,%,prcnt,OFFICIAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_C_001,SOIL,carbon,C,Slurry,SLURRY,Deionized Water,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CMP_001,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_002,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_003,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_004,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,CO2 Paddle,CO2_PADDLE,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,Woods End Laboratories,Solvita Gel System; https://solvita.com/co2-burst/,,13-Nov-24,,
-L_MODV2_SOIL_CMP_005,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_006,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_007,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_008,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_009,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_010,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_011,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_012,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_013,SOIL,Carbon Mineralization Potential,CMP,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_CMP_014,SOIL,Carbon Mineralization Potential,CMP,Respiration,RESPIRATION,Solvita 24 Respiration,-,,24 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,CALCULATION,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Woods End Laboratories, Mt. Vernon, ME.",,13-Nov-24,,
-L_MODV2_SOIL_CMP_015,SOIL,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,SHORT_TERM_CARBON_MINERALIZATION,KOH,N/A,mmhos,4 days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba page 9,,13-Nov-24,,
-L_MODV2_SOIL_CMP_016,SOIL,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,SHORT_TERM_CARBON_MINERALIZATION,NaOH,N/A,mmhos,4 days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba,,13-Nov-24,,
-L_MODV2_SOIL_CMP_017,SOIL,Carbon Mineralization Potential,CMP,Carbon Mineralization,CARBON_MINERALIZATION,4-day incubation followed by CO2 measurement by EC trap,20:8,m/v,4 days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,Cornell,"Mobius-Clune, et.al., 2016. Comprehensive Assessment of Soil Health. Soil Respiration, p 51-52. Third addition, Cornell University.",,13-Nov-24,,
-L_MODV2_SOIL_TC_001,SOIL,"carbon, total",TC,Combustion,COMBUSTION,Combustion,N/A,m,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CO3_001,SOIL,carbonate,CO3,Acetic Acid,ACETIC_ACID,Acetic Acid,,,,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CO3_002,SOIL,carbonate,CO3,Slurry,SLURRY,Deionized Water,1:1,m/v,,Titration,TITRATION,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CO3_003,SOIL,carbonate,CO3,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,CALCULATION,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CO3_004,SOIL,carbonate,CO3,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CO3_005,SOIL,carbonate,CO3,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_CO3QUAL_001,SOIL,"carbonates, qualitative",CO3QUAL,Hydrochloric Acid,HYDROCHLORIC_ACID,Hydrochloric Acid Effervescence,N/A,m/v,N/A,Semi-Quantitative,SEMI-QUANTITATIVE,OBSERVED,None,none,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-13.05",,13-Nov-24,,
-L_MODV2_SOIL_CEC_001,SOIL,cation exchange capacity,CEC,Ammonium Acetate,AMMONIUM_ACETATE,Displacement - Ammonium Acetate ,1:5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.10",,13-Nov-24,,
-L_MODV2_SOIL_CEC_002,SOIL,cation exchange capacity,CEC,Ammonium Acetate,AMMONIUM_ACETATE,Displacement - Ammonium Acetate,1:25,m/v,Overnight,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,https://www.epa.gov/sites/production/files/2015-12/documents/9080.pdf,,13-Nov-24,,
-L_MODV2_SOIL_CEC_003,SOIL,cation exchange capacity,CEC,Ammonium Acetate,AMMONIUM_ACETATE,Alcohol Prewash/Ammonium Acetate ,1:20,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,13-Nov-24,,
-L_MODV2_SOIL_CEC_004,SOIL,cation exchange capacity,CEC,Ammonium Acetate,AMMONIUM_ACETATE,1.0 N Ammonium Acetate buffered to pH 8.5,1:10,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,13-Nov-24,,
-L_MODV2_SOIL_CEC_005,SOIL,cation exchange capacity,CEC,Barium Chloride,BARIUM_CHLORIDE,Displacement - Barium Chloride,1:5,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mEq/100g,mEq1hg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-13.20",,13-Nov-24,,
-L_MODV2_SOIL_CEC_006,SOIL,cation exchange capacity,CEC,Barium Chloride,BARIUM_CHLORIDE,"Displacement - BaCl2/AA, Acidity 1M KCl",,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CEC_007,SOIL,cation exchange capacity,CEC,Calcium Sulfate,CALCIUM_SULFATE,Displacement - Calcium Sulfate,,m/v,,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mEq/100g,mEq1hg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CEC_008,SOIL,cation exchange capacity,CEC,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mEq/100g,mEq1hg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,13-Nov-24,,
-L_MODV2_SOIL_CEC_009,SOIL,cation exchange capacity,CEC,Potassium,POTASSIUM,Displacement - Potassium,,m/v,,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mEq/100g,mEq1hg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CEC_010,SOIL,cation exchange capacity,CEC,Silver Thiourea,SILVER_THIOUREA,Displacement - Silver Thiourea,,m/v,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mEq/100g,mEq1hg-1,PROVISIONAL,VALID,,"Searle, P. L. ""The measurement of soil cation exchange properties using the single extraction, silver thiourea method-an evaluation using a range of New Zealand soils."" Soil Research 24.2 (1986): 193-200.",,13-Nov-24,,
-L_MODV2_SOIL_CEC_011,SOIL,cation exchange capacity,CEC,Sodium Acetate,SODIUM_ACETATE,Displacement - Sodium Acetate (EPA 9081),1:20,m/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mEq/100g,mEq1hg-1,OFFICIAL,VALID,US-EPA,https://www.epa.gov/sites/production/files/2015-12/documents/9081.pdf,,13-Nov-24,,
-L_MODV2_SOIL_CROSS_001,SOIL,cation ratio of structural stability,CROSS,Slurry,SLURRY,Deionized Water,5:1,,,,,CALCULATION,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CAMGRATIO_001,SOIL,Ca:Mg ratio,CAMGRATIO,,,,,,,Calculation,,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_001,SOIL,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,0.01 M Ca(NO3)2,1:2.5,m/v,15 min,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.3-11.4",,13-Nov-24,,
-L_MODV2_SOIL_CL_002,SOIL,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,0.01 M Ca(NO3)2,1:2.5,m/v,15 min,ion selective electrode,ION_SELECTIVE_ELECTRODE,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.2-11.3",,13-Nov-24,,
-L_MODV2_SOIL_CL_003,SOIL,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,0.01 M Ca(NO3)2,1:2.5,m/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.1-11.2.",,13-Nov-24,,
-L_MODV2_SOIL_CL_004,SOIL,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,HgThiocyanate/Ca(NO3)2.4H2O,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_005,SOIL,chloride,CL,Slurry,SLURRY,Deionized Water,1:1,m/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_006,SOIL,chloride,CL,Slurry,SLURRY,Deionized Water,1:1,m/v,,Titration,TITRATION,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_007,SOIL,chloride,CL,Slurry,SLURRY,Deionized Water,1:1,m/v,,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_008,SOIL,chloride,CL,Slurry,SLURRY,Deionized Water,1:1,m/v,,chloridometer,CHLORIDOMETER,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_009,SOIL,chloride,CL,EPA 300.0,EPA_300_0,Deionized water - EPA 300.0,1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,13-Nov-24,,
-L_MODV2_SOIL_CL_010,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis, titration with Hg Thiocyanate",Saturated paste,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_011,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis, titration with AgNO3",Saturated paste,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_012,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Chloridometer,CHLORIDOMETER,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_013,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_014,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_015,SOIL,chloride,CL,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CL_016,SOIL,chloride,CL,Slurry,SLURRY,"DI water, subsequent extraction and retained for analysis, titration with Hg Thiocyanate",1:5,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_017,SOIL,chloride,CL,Slurry,SLURRY,"DI water, subsequent extraction and retained for analysis, titration with AgNO3",1:5,m/m,4 hrs,Titration,TITRATION,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_018,SOIL,chloride,CL,,,1:5,1:5,m/m,,,,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_019,SOIL,chloride,CL,,,1:5,1:5,m/m,,Chloridometer,CHLORIDOMETER,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CL_020,SOIL,chloride,CL,,,1:5,1:5,m/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CR_001,SOIL,chromium,CR,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_CR_002,SOIL,chromium,CR,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CR_003,SOIL,chromium,CR,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CR_004,SOIL,chromium,CR,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CR_005,SOIL,chromium,CR,,,EPA 3050 Digestion Acid Recoverable,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CR_006,SOIL,chromium,CR,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_CLAY_001,SOIL,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m, ,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA < 0.02 mm,13-Nov-24,,
-L_MODV2_SOIL_CLAY_002,SOIL,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Laser Diffraction,1:20 (varies),m/m,5 min,Diffraction,DIFFRACTION,MEASURED,%,prcnt,PROVISIONAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",USDA < 0.02 mm,13-Nov-24,,
-L_MODV2_SOIL_CLAY_003,SOIL,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sedimentation / Hydrometer,1:20 (varies),m/m,Varies,Hydrometer,HYDROMETER,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",USDA < 0.02 mm,13-Nov-24,,
-L_MODV2_SOIL_CLAY_004,SOIL,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sedimentation / Pipette / Weigh,1:20 (varies),m/m,5 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",USDA < 0.02 mm,13-Nov-24,,
-L_MODV2_SOIL_CO2RESP_001,SOIL,CO2 respiration,CO2RESP,Respiration,RESPIRATION,Solvita 24 Respiration,,,24 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,CALCULATION,mg/kg,mg1kg-1,PROVISIONAL,SUPERSEDED,,"Woods End Laboratories, Mt. Vernon, ME.",,13-Nov-24,,
-L_MODV2_SOIL_CO2RESP_002,SOIL,CO2 respiration,CO2RESP,Short Term Carbon Mineralization,SHORT_TERM_CARBON_MINERALIZATION,KOH,N/A,mmhos,4 days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,SUPERSEDED,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba page 9,,13-Nov-24,,
-L_MODV2_SOIL_CO2RESP_003,SOIL,CO2 respiration,CO2RESP,Short Term Carbon Mineralization,SHORT_TERM_CARBON_MINERALIZATION,NaOH,N/A,mmhos,4 days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,SUPERSEDED,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba,,13-Nov-24,,
-L_MODV2_SOIL_CO_001,SOIL,cobalt,CO,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_CO_002,SOIL,cobalt,CO,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_CO_003,SOIL,cobalt,CO,DTPA,DTPA,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CO_004,SOIL,cobalt,CO,EPA 200.7,EPA_200_7,,,,,,,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CO_005,SOIL,cobalt,CO,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CO_006,SOIL,cobalt,CO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CO_007,SOIL,cobalt,CO,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CO_008,SOIL,cobalt,CO,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CO_009,SOIL,cobalt,CO,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_COLOR_001,SOIL,color,COLOR,Munsell Color Chart,MUNSELL_COLOR_CHART,,,,,Observation,OBSERVATION,OBSERVED,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CU_001,SOIL,copper,CU,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_CU_002,SOIL,copper,CU,DTPA,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",1:2,m/v,120 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,13-Nov-24,,
-L_MODV2_SOIL_CU_003,SOIL,copper,CU,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_CU_004,SOIL,copper,CU,EDTA,EDTA,EDTA (0.04 M EDTA),1:2.5,m/v,120 min,AAS,AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,13-Nov-24,,
-L_MODV2_SOIL_CU_005,SOIL,copper,CU,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_CU_006,SOIL,copper,CU,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CU_007,SOIL,copper,CU,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_CU_008,SOIL,copper,CU,EPA 6010B,EPA_6010B,,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CU_009,SOIL,copper,CU,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_CU_010,SOIL,copper,CU,Hydrochloric Acid,HYDROCHLORIC_ACID,0.1 M HCl,1:4,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"NCERA-13, NEC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,13-Nov-24,,
-L_MODV2_SOIL_CU_011,SOIL,copper,CU,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_CU_012,SOIL,copper,CU,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_CU_013,SOIL,copper,CU,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_CU_014,SOIL,copper,CU,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CU_015,SOIL,copper,CU,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_CU_016,SOIL,copper,CU,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_CU_017,SOIL,copper,CU,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_CU_018,SOIL,copper,CU,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CU_019,SOIL,copper,CU,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CU_020,SOIL,copper,CU,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CU_021,SOIL,copper,CU,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_CU_022,SOIL,copper,CU,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_CU_023,SOIL,copper,CU,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_CUINDEX_001,SOIL,copper index,CUINDEX,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_DM_001,SOIL,deleterious material,DM,,,,,,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_DINDEX_001,SOIL,dispersion index,DINDEX,,,,,,,Observation,OBSERVATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_DON_001,SOIL,dissolved organic nitrogen (DON),DON,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_EC_001,SOIL,electrical conductivity,EC,EC Slurry,EC_SLURRY,Deionized Water,1:1,m/m,10 min,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-2.20",,13-Nov-24,,
-L_MODV2_SOIL_EC_002,SOIL,electrical conductivity,EC,EC Slurry,EC_SLURRY,Deionized Water,1:2,m/m,10 min,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-2.20",,13-Nov-24,,
-L_MODV2_SOIL_EC_003,SOIL,electrical conductivity,EC,EC Slurry,EC_SLURRY,Deionized Water,1:5,m/m,10 min,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,dS/m,dS1m-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_EC_004,SOIL,electrical conductivity,EC,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_EC_005,SOIL,electrical conductivity,EC,,,,,,,Calculation,CALCULATION,MEASURED,dS/m,dS1m-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ESI_001,SOIL,electrochemical stability index,ESI,,,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_EMERSON_001,SOIL,emerson class,EMERSON,,,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ENR_001,SOIL,estimated nitrogen release,ENR,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,CALCULATION,mg/L,mg1L-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SLINDEX_001,SOIL,excess soil lime index,SLINDEX,Mehlich 3,MEHLICH_3,0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA,0.048611111,m/m,5 min,ICP-OES,ICP-OES,Calculation,Description,Description,EXPERIMENTAL,VALID,USDA,"Soil Science Division Staff. 2017. Soil survey manual. C. Ditzler, K. Scheffe, and H.C. Monger (eds.). USDA Handbook 18. Government Printing Office, Washington, D.C., pg. 199-200.",,13-Nov-24,,
-L_MODV2_SOIL_XACIDT_001,SOIL,exchangeable acidity,XACIDT,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,,,,Titration,TITRATION,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XAL_001,SOIL,exchangeable aluminum,XAL,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XCAP_001,SOIL,exchangeable calcium percentage,XCAP,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XH_001,SOIL,exchangeable hydrogen,XH,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,,,,Titration,TITRATION,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XHP_001,SOIL,exchangeable hydrogen percentage,XHP,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XMGP_001,SOIL,exchangeable magnesium percentage,XMGP,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XKP_001,SOIL,exchangeable potassium percentage,XKP,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_XNAP_001,SOIL,exchangeable sodium percentage,XNAP,Saturated paste,SATURATED_PASTE,Deionized Water,Saturated paste,Saturated Paste,4 hrs,Calculation,CALCULATION,MEASURED,%,prcnt,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_F_001,SOIL,fluoride,F,EPA 300.0,EPA_300_0,Deionized water - EPA 300.0,1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,13-Nov-24,,
-L_MODV2_SOIL_GENOM_001,SOIL,genomics,GENOM,Genomics,GENOMICS,"16S rRNA, ITS, and shotgun metagenomics",1:10,,,,,MEASURED,None,none,OFFICIAL,VALID,Soil Health Institute,"Thompson, et al., 2017;",,13-Nov-24,,
-L_MODV2_SOIL_GTRI_001,SOIL,grass tetany risk index,GTRI,Alcohol Prewash/Ammonium Acetate,ALCOHOL_PREWASH_AMMONIUM_ACETATE,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GTRI_002,SOIL,grass tetany risk index,GTRI,Ammonium Acetate,AMMONIUM_ACETATE,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GTRI_003,SOIL,grass tetany risk index,GTRI,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GRAVEL_001,SOIL,gravel,GRAVEL,Sieve,SIEVE,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GYPREC_001,SOIL,gypsum recommendation,GYPREC,,,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_HEAL_001,SOIL,H+EALP,HEAL,SMP,SMP,,,,,Calculation,CALCULATION,CALCULATION,none,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_HM_001,SOIL,humic matter,HM,FSPA 15(12)84,FSPA_15_12_84,,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_HM_002,SOIL,humic matter,HM,Humic Matter,HUMIC_MATTER,0.2 N NaOH,1:40,v/v,16 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 5.5, pp 162-166.",,13-Nov-24,,
-L_MODV2_SOIL_HAL_001,SOIL,hydrogen+aluminum,HAL,SMP,SMP,,,,,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_OH_001,SOIL,hydroxide,OH,SM 2320 B (18th Ed.),SM_2320_B_18TH_ED,,,,,Titrimetric,TITRIMETRIC,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_FE_001,SOIL,iron,FE,Ammonium Oxalate,AMMONIUM_OXALATE,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",1:5,m/v,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_FE_002,SOIL,iron,FE,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_FE_003,SOIL,iron,FE,DTPA,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",1:2,m/v,120 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,13-Nov-24,,
-L_MODV2_SOIL_FE_004,SOIL,iron,FE,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_FE_005,SOIL,iron,FE,EDTA,EDTA,EDTA (0.04 M EDTA),1:2.5,m/v,120 min,AAS,AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,13-Nov-24,,
-L_MODV2_SOIL_FE_006,SOIL,iron,FE,EPA 3050 Digestion Acid Recoverable,EPA_3050_DIGESTION_ACID_RECOVERABLE,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_FE_007,SOIL,iron,FE,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_FE_008,SOIL,iron,FE,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_FE_009,SOIL,iron,FE,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_FE_010,SOIL,iron,FE,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_FE_011,SOIL,iron,FE,Hydrochloric Acid,HYDROCHLORIC_ACID,0.1 M HCl,1:4,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"NCERA-13, NEC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,13-Nov-24,,
-L_MODV2_SOIL_FE_012,SOIL,iron,FE,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_FE_013,SOIL,iron,FE,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_FE_014,SOIL,iron,FE,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_FE_015,SOIL,iron,FE,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_FE_016,SOIL,iron,FE,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_FE_017,SOIL,iron,FE,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_FE_018,SOIL,iron,FE,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_FE_019,SOIL,iron,FE,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_FE_020,SOIL,iron,FE,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_FE_021,SOIL,iron,FE,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_FE_022,SOIL,iron,FE,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:5,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,13-Nov-24,,
-L_MODV2_SOIL_CAMGRATIO_001,SOIL,Ca:Mg ratio,CAMGRATIO,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CANO3RATIO_001,SOIL,Ca:NO3 ratio,CANO3RATIO,,,,,,,,,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_CATANRATIO_001,SOIL,cation:anion ratio,CATANRATIO,,,,,,,,,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KBRATIO_001,SOIL,K:B ratio,KBRATIO,,,,,,,,,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KBRATIO_002,SOIL,K:B ratio,KBRATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KMGRATIO_001,SOIL,K:Mg ratio,KMGRATIO,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KMGRATIO_002,SOIL,K:Mg ratio,KMGRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KNARATIO_001,SOIL,K:Na ratio,KNARATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PB_001,SOIL,lead,PB,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_PB_002,SOIL,lead,PB,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_PB_003,SOIL,lead,PB,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_PB_004,SOIL,lead,PB,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_PB_005,SOIL,lead,PB,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_PB_006,SOIL,lead,PB,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_PB_007,SOIL,lead,PB,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_PB_008,SOIL,lead,PB,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_PB_009,SOIL,lead,PB,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_LINDEX_001,SOIL,lime index,LINDEX,Soil Characteristics Regression,SOIL_CHARACTERISTICS_REGRESSION,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_001,SOIL,lime recommendation,LREC,Adams-Evans buffer,ADAMS-EVANS_BUFFER,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_002,SOIL,lime recommendation,LREC,"Adams-Evans, Modified",ADAMS-EVANS_MODIFIED,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_003,SOIL,lime recommendation,LREC,Mehlich buffer,MEHLICH_BUFFER,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_004,SOIL,lime recommendation,LREC,Modified Woodruff buffer,MODIFIED_WOODRUFF_BUFFER,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_005,SOIL,lime recommendation,LREC,Sikora 1 buffer,SIKORA_1_BUFFER,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_006,SOIL,lime recommendation,LREC,Sikora 2 buffer,SIKORA_2_BUFFER,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_007,SOIL,lime recommendation,LREC,SMP,SMP,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_008,SOIL,lime recommendation,LREC,Titratable Acidity,TITRATABLE_ACIDITY,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LREC_009,SOIL,lime recommendation,LREC,Woodruff,WOODRUFF,,,,,Calculation,CALCULATION,MEASURED,tons/ac,ton1ac-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_LI_001,SOIL,lithium,LI,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MG_001,SOIL,magnesium,MG,Alcohol Prewash/Ammonium Acetate,ALCOHOL_PREWASH_AMMONIUM_ACETATE,,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_002,SOIL,magnesium,MG,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_MG_003,SOIL,magnesium,MG,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_004,SOIL,magnesium,MG,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl w/ prewash,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_005,SOIL,magnesium,MG,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_006,SOIL,magnesium,MG,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_MG_007,SOIL,magnesium,MG,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_008,SOIL,magnesium,MG,Slurry,SLURRY,Deionized Water,1:1,m/v,,ICP-OES,ICP-OES,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_009,SOIL,magnesium,MG,Slurry,SLURRY,Deionized Water ,1:20,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_010,SOIL,magnesium,MG,Slurry,SLURRY,Deionized Water,1:5,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_011,SOIL,magnesium,MG,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MG_012,SOIL,magnesium,MG,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MG_013,SOIL,magnesium,MG,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MG_014,SOIL,magnesium,MG,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MG_015,SOIL,magnesium,MG,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_MG_016,SOIL,magnesium,MG,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_MG_017,SOIL,magnesium,MG,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_MG_018,SOIL,magnesium,MG,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_MG_019,SOIL,magnesium,MG,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_MG_020,SOIL,magnesium,MG,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_MG_021,SOIL,magnesium,MG,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MG_022,SOIL,magnesium,MG,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MG_023,SOIL,magnesium,MG,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_MG_024,SOIL,magnesium,MG,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_MG_025,SOIL,magnesium,MG,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_026,SOIL,magnesium,MG,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MG_027,SOIL,magnesium,MG,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MG_028,SOIL,magnesium,MG,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_029,SOIL,magnesium,MG,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl,1:10,m/v,,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MG_030,SOIL,magnesium,MG,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_MG_031,SOIL,magnesium,MG,Truog,TRUOG,"Truog, 0.002N H2S04 buffered with NH4HS04, pH 3.0",1:200,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MGINDEX_001,SOIL,magnesium index,MGINDEX,Mehlich 3 ,MEHLICH_3,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MN_001,SOIL,manganese,MN,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_MN_002,SOIL,manganese,MN,DTPA,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",1:2,m/v,120 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,13-Nov-24,,
-L_MODV2_SOIL_MN_003,SOIL,manganese,MN,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_MN_004,SOIL,manganese,MN,EDTA,EDTA,EDTA (0.04 M EDTA),1:2.5,m/v,120 min,AAS,AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,13-Nov-24,,
-L_MODV2_SOIL_MN_005,SOIL,manganese,MN,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MN_006,SOIL,manganese,MN,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MN_007,SOIL,manganese,MN,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MN_008,SOIL,manganese,MN,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MN_009,SOIL,manganese,MN,Hydrochloric Acid,HYDROCHLORIC_ACID,0.1 M HCl,1:4,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"NCERA-13, NEC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,13-Nov-24,,
-L_MODV2_SOIL_MN_010,SOIL,manganese,MN,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_MN_011,SOIL,manganese,MN,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_MN_012,SOIL,manganese,MN,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_MN_013,SOIL,manganese,MN,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_MN_014,SOIL,manganese,MN,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MN_015,SOIL,manganese,MN,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MN_016,SOIL,manganese,MN,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_MN_017,SOIL,manganese,MN,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_MN_018,SOIL,manganese,MN,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MN_019,SOIL,manganese,MN,Phosphoric Acid,PHOSPHORIC_ACID,Phosphoric Acid (0.033 M H3PO),1:10,m/v,10 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, p 9.3",,13-Nov-24,,
-L_MODV2_SOIL_MN_020,SOIL,manganese,MN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MN_021,SOIL,manganese,MN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MN_022,SOIL,manganese,MN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MN_023,SOIL,manganese,MN,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_MN_024,SOIL,manganese,MN,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_MNINDEX_001,SOIL,manganese index,MNINDEX,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_HG_001,SOIL,mercury,HG,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_HG_002,SOIL,mercury,HG,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_HG_003,SOIL,mercury,HG,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_KNARATIO_001,SOIL,K:Na ratio,KNARATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MGKRATIO_001,SOIL,Mg:K ratio,MGKRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MNCURATIO_001,SOIL,Mn:Cu ratio,MNCURATIO,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MNCURATIO_002,SOIL,Mn:Cu ratio,MNCURATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MNZNRATIO_001,SOIL,Mn:Zn ratio,MNZNRATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GWC_001,SOIL,moisture content,GWC,Oven,OVEN,Gravimetric (dry to constant weight at 105° C),N/A,m/m,16 hrs,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 2A1,  pp 12-13",,13-Nov-24,,
-L_MODV2_SOIL_GWC_002,SOIL,moisture content,GWC,Saturated paste moisture,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_GWC_0_33_BAR_003,SOIL,moisture content,GWC,0.33 Bar Moisture Tension,0_33_BAR_MOISTURE_TENSION,Pressure Plate,,,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GWC_15_BAR_004,SOIL,moisture content,GWC,15 Bar Moisture Tension,15_BAR_MOISTURE_TENSION,Pressure Plate,,,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_GWC_0_1_BAR_005,SOIL,moisture content,GWC,0.1 Bar Moisture Tension,0_1_BAR_MOISTURE_TENSION,Pressure Plate,Saturated paste,m/m,7 Days,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH05-Available-Water-Capacity-SOP-4-2022-1-1.pdf,,13-Nov-24,,
-L_MODV2_SOIL_GAWC_001,SOIL,available moisture content,GAWC,Available Moisture Tension,AVAILABLE_MOISTURE_TENSION,Pressure Plate,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_001,SOIL,molybdenum,MO,Ammonium Oxalate,AMMONIUM_OXALATE,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",1:5,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_002,SOIL,molybdenum,MO,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:5,m/v,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_003,SOIL,molybdenum,MO,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_MO_004,SOIL,molybdenum,MO,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_MO_005,SOIL,molybdenum,MO,Calcium Chloride,CALCIUM_CHLORIDE,Hot CaCl2,,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_006,SOIL,molybdenum,MO,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_MO_007,SOIL,molybdenum,MO,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MO_008,SOIL,molybdenum,MO,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_MO_009,SOIL,molybdenum,MO,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_MO_010,SOIL,molybdenum,MO,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_011,SOIL,molybdenum,MO,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_012,SOIL,molybdenum,MO,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_MO_013,SOIL,molybdenum,MO,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MO_014,SOIL,molybdenum,MO,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_MO_015,SOIL,molybdenum,MO,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_016,SOIL,molybdenum,MO,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MO_017,SOIL,molybdenum,MO,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MO_018,SOIL,molybdenum,MO,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS (0.5 M HCl),Saturated paste,in situ probe,60 min acid leaching,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MO_019,SOIL,molybdenum,MO,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_MO_020,SOIL,molybdenum,MO,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MO_021,SOIL,molybdenum,MO,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_MO_022,SOIL,molybdenum,MO,Slurry,SLURRY,Hot Dionized Water,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NAG_001,SOIL,N-acetyl-β-D-glucosaminidase (NAG),NAG,Incubation,INCUBATION,Assay incubation,1:10,v/v,60 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,nmol/h/mg,nmol1hr-1mg-1,EXPERIMENTAL,VALID,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba Page 61,,13-Nov-24,,
-L_MODV2_SOIL_NI_001,SOIL,nickel,NI,EPA 3050 Digestion Acid Recoverable,EPA_3050_DIGESTION_ACID_RECOVERABLE,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NI_002,SOIL,nickel,NI,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_NI_003,SOIL,nickel,NI,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_NI_004,SOIL,nickel,NI,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_NI_005,SOIL,nickel,NI,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_NO3_001,SOIL,nitrate,NO3,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_NO3_002,SOIL,nitrate,NO3,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_001,SOIL,nitrate-nitrogen,NO3N,Aluminum Sulfate,ALUMINUM_SULFATE,Aluminum Sulfate/Boric Acid,,,,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_002,SOIL,nitrate-nitrogen,NO3N,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_003,SOIL,nitrate-nitrogen,NO3N,Calcium Chloride,CALCIUM_CHLORIDE,2.0 M CaCl2,1:5,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_004,SOIL,nitrate-nitrogen,NO3N,Calcium Sulfate,CALCIUM_SULFATE,Calcium Sulfate/ Chromotropic Acid,1:5,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103. Method S-3.30, pp 41-42",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_005,SOIL,nitrate-nitrogen,NO3N,Slurry,SLURRY,Deionized Water ,1:1,,,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_006,SOIL,nitrate-nitrogen,NO3N,EPA 300.0,EPA_300_0,Deionized water - EPA 300.0,1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_007,SOIL,nitrate-nitrogen,NO3N,EPA 353.2,EPA_353_2,,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_008,SOIL,nitrate-nitrogen,NO3N,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_009,SOIL,nitrate-nitrogen,NO3N,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_010,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,1:5,m/v,30 min,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_011,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,1:2.5,m/v,5 min,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.2-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_012,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,1:5,m/v,30 min,Dif-Cond/Spectrophotometric,DIF-COND_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_013,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_014,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,1:5,m/v,30 min,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_015,SOIL,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,0.5 M KCl,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_016,SOIL,nitrate-nitrogen,NO3N,Potassium Sulfate,POTASSIUM_SULFATE,0.5 M K2SO4,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_017,SOIL,nitrate-nitrogen,NO3N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis, Chromotrophic Acid",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_018,SOIL,nitrate-nitrogen,NO3N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_019,SOIL,nitrate-nitrogen,NO3N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ion selective electrode,ION_SELECTIVE_ELECTRODE,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_020,SOIL,nitrate-nitrogen,NO3N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NO3N_021,SOIL,nitrate-nitrogen,NO3N,Sodium Bicarbonate,SODIUM_BICARBONATE,Extraction/Bicarb,1:20,,,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NO3N_022,SOIL,nitrate-nitrogen,NO3N,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,mEq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NO2N_001,SOIL,nitrite-nitrogen,NO2N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:5,m/v,30 min,Cd Red/Spectrophotometric,CD_RED_SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,13-Nov-24,,
-L_MODV2_SOIL_NMR_001,SOIL,nitrogen mineralization rate,NMR,Incubation,INCUBATION,Short-term anaerobic incubation with ammonium and nitrate measured colorimetrically pre- and post-incubation,1:10,m/v,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Bundy and Meisinger, 1994",,13-Nov-24,,
-L_MODV2_SOIL_TKN_001,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_002,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_003,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_004,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Steam Distillation/Titration,STEAM_DISTILLATION_TITRATION,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_005,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_006,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_007,SOIL,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,13-Nov-24,21-May-25,Corrected analyte to TKN
-L_MODV2_SOIL_TKN_008,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_009,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_010,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_011,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Steam Distillation/Titration,STEAM_DISTILLATION_TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_012,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_013,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TKN_014,SOIL,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,18 M H2SO4,1:10 (varies),m/v,45-75 minutes,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,21-May-25,,
-L_MODV2_SOIL_TN_001,SOIL,"nitrogen, total",TN,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TN_002,SOIL,"nitrogen, total",TN,Combustion,COMBUSTION,Combustion,N/A,m,10 min typical,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, Method S-9.30, pp 116-118.",,13-Nov-24,,
-L_MODV2_SOIL_TN_003,SOIL,"nitrogen, total",TN,Slurry,SLURRY,Deionized Water,,m/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TN_004,SOIL,"nitrogen, total",TN,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,lb/ac/day,lb1ac-1day-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TIN_001,SOIL,"nitrogen, total inorganic",TIN,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 33.",,13-Nov-24,,
-L_MODV2_SOIL_NULL_001,SOIL,null,NULL,,,,,,,,,MEASURED,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_OC_001,SOIL,organic carbon,OC,Combustion,COMBUSTION,Combustion,N/A,m,N/A,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 3rd Edition, 2005, Method S-9.10, pp 111-113.",,13-Nov-24,,
-L_MODV2_SOIL_OC_002,SOIL,organic carbon,OC,Walkley-Black,WALKLEY-BLACK,Walkley-Black (0.5 M Na2Cr2O7 •2H2O in 5 M H2SO4),1:10,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.4-12.5.",,13-Nov-24,,
-L_MODV2_SOIL_OC_003,SOIL,organic carbon,OC,Walkley-Black,WALKLEY-BLACK,"Dichromate Acid, Titration FeCl3",1:30,m/v,30 min,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,13-Nov-24,,
-L_MODV2_SOIL_OC_004,SOIL,organic carbon,OC,Walkley-Black,WALKLEY-BLACK,"Walkley-Black (0.167 M K2Cr2O7 + conc. H2SO4), Titration with FeCl3",1:30,m/v,30 min,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.3-12.4.",,13-Nov-24,,
-L_MODV2_SOIL_OC_005,SOIL,organic carbon,OC,Slurry,SLURRY,Deionized Water,1:10,,,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_OC_006,SOIL,organic carbon,OC,Loss on Ignition (LOI),LOSS_ON_IGNITION,Loss-on-Ignition - Heat at 360C for two hours (after temperature reaches 360C),N/A,m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,VALID,ASPAC,"KARLA, Y. P., and D. G.MAYNARD, 1991.  Methods manual for forest soil and plant analysis. For. Can., Northwest Reg., North.For. Cent., Edmonton, Alberta. Canada. L11",,13-Nov-24,,
-L_MODV2_SOIL_TOC_001,SOIL,"organic carbon, total",TOC,Dichromate Acid,DICHROMATE_ACID,Titration with FeCl3,,,,Titration,TITRATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_OM_001,SOIL,organic matter,OM,Calculation,CALCULATION,Organic Matter (Calculated),Calculation,Calculation,Calculation,Calculation,CALCULATION,CALCULATION,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_OM_002,SOIL,organic matter,OM,Color,COLOR,Munsel Color Chart,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_OM_003,SOIL,organic matter,OM,Combustion,COMBUSTION,Combustion,N/A,m,10 min,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 3rd Edition, 2005, Method S-9.10, pp 111-113.",,13-Nov-24,,
-L_MODV2_SOIL_OM_004,SOIL,organic matter,OM,Loss on Ignition (LOI),LOSS_ON_IGNITION,Loss-on-Ignition - Heat at 360C for two hours (after temperature reaches 360C),N/A,m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,13-Nov-24,,
-L_MODV2_SOIL_OM_005,SOIL,organic matter,OM,Walkley-Black,WALKLEY-BLACK,Walkley-Black (0.5 M Na2Cr2O7 •2H2O in 5 M H2SO4),1:10,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.4-12.5.",,13-Nov-24,,
-L_MODV2_SOIL_OM_006,SOIL,organic matter,OM,Walkley-Black,WALKLEY-BLACK,"Walkley-Black (0.167 M K2Cr2O7 + conc. H2SO4), Titration with FeCl3",1:10,m/v,30 min,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.3-12.4.",,13-Nov-24,,
-L_MODV2_SOIL_OM_007,SOIL,organic matter,OM,Loss on Ignition (LOI),LOSS_ON_IGNITION,Loss-on-Ignition - Heat at 550C for two hours (after temperature reaches 360C),N/A,m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,VALID,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH10-Soil-Organic-Matter-Loss-on-Ignition-Total-C-Soil-Organic-Carbon-and-Total-N-SOP-4-2022.pdf,,13-Nov-24,,
-L_MODV2_SOIL_ON_001,SOIL,organic nitrogen,ON,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_OTHER_001,SOIL,other,OTHER,,,,,,,,,MEASURED,None,none,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_MNZNRATIO_001,SOIL,Mn:Zn ratio,MNZNRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PCURATIO_001,SOIL,P:Cu ratio,PCURATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PCURATIO_002,SOIL,P:Cu ratio,PCURATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PMNRATIO_001,SOIL,P:Mn ratio,PMNRATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PMNRATIO_002,SOIL,P:Mn ratio,PMNRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PSRATIO_001,SOIL,P:S ratio,PSRATIO,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PSRATIO_002,SOIL,P:S ratio,PSRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PZNRATIO_001,SOIL,P:Zn ratio,PZNRATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PARTDENS_001,SOIL,particle density,PARTDENS,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Sodium hexameta phosphate, 5g/L",1:20 (varies),m/m,120 min,Pycnometer,PYCNOMETER,MEASURED,g/cm3,g1[cm3]-1,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,13-Nov-24,,
-L_MODV2_SOIL_POM_001,SOIL,particulate organic matter 53-2000 um,POM,Sodium Hexametaphosphate Solution / Reciprocating Shaker,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_RECIPROCATING_SHAKER,"Sodium hexameta phosphate, 5g/L",1:10 (varies),m/m,18 hrs,Gravimetric,GRAVIMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,SSSA,"Cambardella, Cynthia A., and E. T. Elliott. ""Particulate soil organic‐matter changes across a grassland cultivation sequence."" Soil science society of America journal 56.3 (1992): 777-783.",,13-Nov-24,,
-L_MODV2_SOIL_MNO4OXC_001,SOIL,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium Permanganate,POTASSIUM_PERMANGANATE,KMnO4,1:4,m/v,2 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,AJAC/SSSA,"Am. J. of Alt. Agric. 18: 3–17. doi:10.1079/AJAA2003003, Soil Sci. Soc. Am. J. 76:494–504. doi:10.2136/sssaj2011.0286",,13-Nov-24,,
-L_MODV2_SOIL_MNO4OXC_002,SOIL,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium permanganate,POTASSIUM_PERMANGANATE,Permanganate oxidizable carbon (POXC). Digestion followed by colorimetric measurement,1:10,m/v,2 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Weil, et al., 2003",,13-Nov-24,,
-L_MODV2_SOIL_PH_001,SOIL,pH,PH,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,H+ ISE,H_ISE,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_PH_002,SOIL,pH,PH,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:1,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-2.20",,13-Nov-24,,
-L_MODV2_SOIL_PH_003,SOIL,pH,PH,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:2,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,13-Nov-24,,
-L_MODV2_SOIL_PH_004,SOIL,pH,PH,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2 solution,1:2,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,13-Nov-24,,
-L_MODV2_SOIL_PH_005,SOIL,pH,PH,Slurry,SLURRY,Deionized Water,1:1,m/v,30 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 4, pp 4.1-4.2.",,13-Nov-24,,
-L_MODV2_SOIL_PH_006,SOIL,pH,PH,Slurry,SLURRY,Deionized Water,1:2,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-2.22",,13-Nov-24,,
-L_MODV2_SOIL_PH_007,SOIL,pH,PH,Slurry,SLURRY,Deionized Water,1:2.5,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,PROVISIONAL,VALID,SERA-6,,,13-Nov-24,,
-L_MODV2_SOIL_PH_008,SOIL,pH,PH,Slurry,SLURRY,Deionized Water,1:5,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,PROVISIONAL,VALID,SERA-6,,,13-Nov-24,,
-L_MODV2_SOIL_PH_009,SOIL,pH,PH,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl solution,1:1,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,13-Nov-24,,
-L_MODV2_SOIL_PH_010,SOIL,pH,PH,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,1:1,m/v,15 min,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,13-Nov-24,,
-L_MODV2_SOIL_PH_011,SOIL,pH,PH,Potassium Chloride,POTASSIUM_CHLORIDE,0.01 M CaCl2 solution,1:5,m/v,"Stir, 30 minute settle",H+ ISE,H_ISE,MEASURED,S.U.,su,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PH_012,SOIL,pH,PH,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl solution,1:5,m/v,"Stir vigorously, settle for 15 minutes",H+ ISE,H_ISE,MEASURED,S.U.,su,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PH_013,SOIL,pH,PH,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,H+ ISE,H_ISE,MEASURED,S.U.,su,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_PO4_001,SOIL,phosphate,PO4,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_PLFA_001,SOIL,phospholipid fatty acid (PLFA),PLFA,PLFA,PLFA,"Bligh-Dyer extractant, solid phase extraction, transesterification;",1:10,m/v,,Gas chromatograph,GAS_CHROMATOGRAPH,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Buyer and Sasser, 2012",,13-Nov-24,,
-L_MODV2_SOIL_PMONOEST_001,SOIL,phosphomonoesterase,PMONOEST,Incubation,INCUBATION,Assay incubation,1:10,v/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,Soil Health Institute,"Acosta-Martinez and Tabatabai, 2011",,13-Nov-24,,
-L_MODV2_SOIL_P_001,SOIL,phosphorus,P,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_P_002,SOIL,phosphorus,P,Ammonium Lactate,AMMONIUM_LACTATE,"Ammonium Lactate 0.1N NH4 lactate + 0.4N CH3COON, pH 3.7",1:20,m/v,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,13-Nov-24,,
-L_MODV2_SOIL_P_003,SOIL,phosphorus,P,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_P_004,SOIL,phosphorus,P,Bray 1,BRAY_1,"Bray P1, 0.03N NH4F + 0.025N HCl, pH 2.7",1:10,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,13-Nov-24,,
-L_MODV2_SOIL_P_005,SOIL,phosphorus,P,Bray 1,BRAY_1,"Bray P1, 0.03N NH4F + 0.025N HCl, pH 2.7",1:7,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,13-Nov-24,,
-L_MODV2_SOIL_P_006,SOIL,phosphorus,P,Bray 2,BRAY_2,"Bray P2, 0.03N NH4F + 0.10N HCl, pH 1.7",1:10,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,University of Missouri,"Extractable Soil Phosphorus
-Bray I and Bray II Methods, Chapter 12, 2012.  Soil Testing In Missouri: A Guide for Conducting Soil Tests in Missouri, EC923, University of Missouri.",,13-Nov-24,,
-L_MODV2_SOIL_P_007,SOIL,phosphorus,P,Bray 2,BRAY_2,,1:7,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_P_008,SOIL,phosphorus,P,Bray-Kurtz,BRAY-KURTZ,,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_P_009,SOIL,phosphorus,P,Calcium Acetate Lactate (CAL),CALCIUM_ACETATE_LACTATE,"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
-acid, brought to 1 liter with DI water",1:20,m/v,90 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,13-Nov-24,,
-L_MODV2_SOIL_P_010,SOIL,phosphorus,P,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Commun. Soil Sci. Plant Anal. 1990, 21, 2281–2290.",,13-Nov-24,,
-L_MODV2_SOIL_P_011,SOIL,phosphorus,P,Calculation,CALCULATION,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_012,SOIL,phosphorus,P,Carbon Dioxide,CARBON_DIOXIDE,Saturated CO2 Method,1:20,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_013,SOIL,phosphorus,P,Colwell,COLWELL,"Colwell (Bicarbonate) 0.5M NaCO3, pH 8.5",1:100,m/v,16 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,13-Nov-24,,
-L_MODV2_SOIL_P_014,SOIL,phosphorus,P,Slurry,SLURRY,Deionized Water,1:1,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_015,SOIL,phosphorus,P,Slurry,SLURRY,Deionized Water,1:5,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_016,SOIL,phosphorus,P,Slurry,SLURRY,Deionized Water,1:10,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_017,SOIL,phosphorus,P,Slurry,SLURRY,Deionized Water,1:20,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_018,SOIL,phosphorus,P,Diffuse Gradient Thin Films,DIFFUSE_GRADIENT_THIN_FILMS,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,13-Nov-24,,
-L_MODV2_SOIL_P_019,SOIL,phosphorus,P,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_P_020,SOIL,phosphorus,P,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_P_021,SOIL,phosphorus,P,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_022,SOIL,phosphorus,P,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_P_023,SOIL,phosphorus,P,Kelowna,KELOWNA,"Kelowna, 0.25N HOAc + 0.015N NH4F",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291. ",,13-Nov-24,,
-L_MODV2_SOIL_P_024,SOIL,phosphorus,P,Kelowna,KELOWNA,"Modified Kelowna-95, 0.5N HOAc + 0.015N NH4F + 1 N NH4Oac",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,13-Nov-24,,
-L_MODV2_SOIL_P_025,SOIL,phosphorus,P,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_P_026,SOIL,phosphorus,P,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_P_027,SOIL,phosphorus,P,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_P_028,SOIL,phosphorus,P,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_P_029,SOIL,phosphorus,P,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_P_030,SOIL,phosphorus,P,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_P_031,SOIL,phosphorus,P,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_P_032,SOIL,phosphorus,P,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_P_033,SOIL,phosphorus,P,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_P_034,SOIL,phosphorus,P,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_P_035,SOIL,phosphorus,P,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_P_036,SOIL,phosphorus,P,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_P_037,SOIL,phosphorus,P,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_P_038,SOIL,phosphorus,P,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_P_039,SOIL,phosphorus,P,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_040,SOIL,phosphorus,P,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_P_041,SOIL,phosphorus,P,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_P_042,SOIL,phosphorus,P,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_P_043,SOIL,phosphorus,P,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_P_044,SOIL,phosphorus,P,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_P_045,SOIL,phosphorus,P,Sodium Bicarbonate,SODIUM_BICARBONATE,"Bicarbonate, 0.5M NaHCO3, pH 8.5",1:20,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,13-Nov-24,,
-L_MODV2_SOIL_P_046,SOIL,phosphorus,P,Sulfuric Acid,SULFURIC_ACID,0.005 M H2SO4,1:10,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_047,SOIL,phosphorus,P,Truog,TRUOG,"Truog, 0.002N H2S04 buffered with NH4HS04, pH 3.0",1:200,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_048,SOIL,phosphorus,P,"Truog, Modified",TRUOG_MODIFIED,"Modified Truog, 0.001N H2S04 buffered with 3% NH4HS04, pH 3.0",1:100,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_P_049,SOIL,phosphorus,P,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_PBUFINDEX_001,SOIL,phosphorus buffer index,PBUFINDEX,Calculation,CALCULATION,Phosphorus Equilibration Solution,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PBUFINDEX_002,SOIL,phosphorus buffer index,PBUFINDEX,Calculation,CALCULATION,Bicarbonate (Olsen),Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PBUFINDEX_003,SOIL,phosphorus buffer index,PBUFINDEX,Calculation,CALCULATION,Bicarbonate (Colwell),Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PBUFINDEX_004,SOIL,phosphorus buffer index,PBUFINDEX,Calculation,CALCULATION,CaCl2/PO4,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PERINDEX_001,SOIL,phosphorus environmental risk index,PERINDEX,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PFF_001,SOIL,phosphorus fixation factor,PFF,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Phosphorus Fixation Factor),Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_001,SOIL,phosphorus index,PINDEX,Calculation,CALCULATION,Ratio of P to Ca and Fe,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_002,SOIL,phosphorus index,PINDEX,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_003,SOIL,phosphorus index,PINDEX,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_004,SOIL,phosphorus index,PINDEX,Calculation,CALCULATION,Ratio of P to Ca and Fe,Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_005,SOIL,phosphorus index,PINDEX,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PRATIO_001,SOIL,phosphorus ratio,PRATIO,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,ICP-OES,ICP-OES,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PRI_001,SOIL,phosphorus retention index,PRI,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PSINDEX_001,SOIL,phosphorus saturation index,PSINDEX,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Phosphorus Saturation Index),Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PSINDEX_002,SOIL,phosphorus saturation index,PSINDEX,Mehlich 3 ,MEHLICH_3,Mehlich 3 - Standard Oligos,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TP_001,SOIL,"phosphorus, total ",TP,Kjeldahl,KJELDAHL,18 M H2SO4,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TP_002,SOIL,"phosphorus, total ",TP,Nitric Acid,NITRIC_ACID,Nitric Acid,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_001,SOIL,potassium,K,Alcohol Prewash/Ammonium Acetate,ALCOHOL_PREWASH_AMMONIUM_ACETATE,,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_002,SOIL,potassium,K,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_K_003,SOIL,potassium,K,Ammonium Lactate,AMMONIUM_LACTATE,"Ammonium Lactate 0.1N NH4 lactate + 0.4N CH3COON, pH 3.7",1:20,m/v,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,13-Nov-24,,
-L_MODV2_SOIL_K_004,SOIL,potassium,K,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_005,SOIL,potassium,K,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl w/ prewash,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_006,SOIL,potassium,K,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_007,SOIL,potassium,K,Bray 1,BRAY_1,"Bray P1, 0.03N NH4F + 0.025N HCl, pH 2.7",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,13-Nov-24,,
-L_MODV2_SOIL_K_008,SOIL,potassium,K,Bray 1,BRAY_1,"Bray P1, 0.03N NH4F + 0.025N HCl, pH 2.7",1:7,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,13-Nov-24,,
-L_MODV2_SOIL_K_009,SOIL,potassium,K,Bray 2,BRAY_2,"Bray P2, 0.03N NH4F + 0.10N HCl, pH 1.7",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_010,SOIL,potassium,K,Calcium Acetate Lactate (CAL),CALCIUM_ACETATE_LACTATE,"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
-acid, brought to 1 liter with DI water",1:20,m/v,90 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,13-Nov-24,,
-L_MODV2_SOIL_K_011,SOIL,potassium,K,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for",,13-Nov-24,,
-L_MODV2_SOIL_K_012,SOIL,potassium,K,Calculation,CALCULATION,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_013,SOIL,potassium,K,Carbon Dioxide,CARBON_DIOXIDE,Saturated CO2 Method,1:20,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_014,SOIL,potassium,K,Colwell,COLWELL,"Colwell (Bicarbonate) 0.5M NaCO3, pH 8.5",1:100,m/v,16 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,13-Nov-24,,
-L_MODV2_SOIL_K_015,SOIL,potassium,K,Slurry,SLURRY,Potassium Water 1:5,1:5,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_016,SOIL,potassium,K,Slurry,SLURRY,Deionized Water,1:1,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_017,SOIL,potassium,K,Slurry,SLURRY,Deionized Water,1:20,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_018,SOIL,potassium,K,Diffuse Gradient Thin Films,DIFFUSE_GRADIENT_THIN_FILMS,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,13-Nov-24,,
-L_MODV2_SOIL_K_019,SOIL,potassium,K,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_K_020,SOIL,potassium,K,Hydrochloric Acid,HYDROCHLORIC_ACID,HCl (Skeen),,,,"ICP, AAS",ICP_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_021,SOIL,potassium,K,Hydrochloric Acid,HYDROCHLORIC_ACID,HCl (Skeen),,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_022,SOIL,potassium,K,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_023,SOIL,potassium,K,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_K_024,SOIL,potassium,K,Kelowna,KELOWNA,"Kelowna, 0.25N HOAc + 0.015N NH4F",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291. ",,13-Nov-24,,
-L_MODV2_SOIL_K_025,SOIL,potassium,K,"Kelowna 2, Modified ",KELOWNA_2_MODIFIED,"Modified Kelowna 2, 0.25N HOAc + 0.015N NH4F + 0.25N NH4Oac",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,13-Nov-24,,
-L_MODV2_SOIL_K_026,SOIL,potassium,K,"Kelowna-95, Modified ",KELOWNA-95_MODIFIED,"Modified Kelowna-95, 0.5N HOAc + 0.015N NH4F + 1 N NH4Oac",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,13-Nov-24,,
-L_MODV2_SOIL_K_027,SOIL,potassium,K,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_K_028,SOIL,potassium,K,M3 - Field-moist K,M3_-_FIELD-MOIST_K,,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_029,SOIL,potassium,K,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_K_030,SOIL,potassium,K,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_K_031,SOIL,potassium,K,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_K_032,SOIL,potassium,K,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_K_033,SOIL,potassium,K,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_K_034,SOIL,potassium,K,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_K_035,SOIL,potassium,K,Nitric Acid,NITRIC_ACID,HNO3,,,,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_036,SOIL,potassium,K,Nitric Acid,NITRIC_ACID,Hot HNO3,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_037,SOIL,potassium,K,Nitric Acid,NITRIC_ACID,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",Saturated paste,Saturated paste,N/A,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,VALID,AOAC International ,https://academic.oup.com/jaoac/article-abstract/68/4/766/5704621?redirectedFrom=fulltext,,13-Nov-24,,
-L_MODV2_SOIL_K_038,SOIL,potassium,K,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,,,,,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_039,SOIL,potassium,K,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_K_040,SOIL,potassium,K,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_K_041,SOIL,potassium,K,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_K_042,SOIL,potassium,K,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_K_043,SOIL,potassium,K,Sodium Bicarbonate,SODIUM_BICARBONATE,"Bicarbonate, 0.5M NaHCO3, pH 8.5",1:20,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,13-Nov-24,,
-L_MODV2_SOIL_K_044,SOIL,potassium,K,Sulfuric Acid,SULFURIC_ACID,0.005 M H2SO4,1:10,m/v,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_045,SOIL,potassium,K,Truog,TRUOG,"Truog, 0.002N H2S04 buffered with NH4HS04, pH 3.0",1:200,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_046,SOIL,potassium,K,"Truog, Modified",TRUOG_MODIFIED,"Modified Truog, 0.001N H2S04 buffered with 3% NH4HS04, pH 3.0",1:100,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_K_047,SOIL,potassium,K,Slurry,SLURRY,Dionized Water,5:1,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_048,SOIL,potassium,K,,,,,,,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_K_049,SOIL,potassium,K,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_K_050,SOIL,potassium,K,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_KFF_001,SOIL,potassium fixation factor,KFF,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_KFF_002,SOIL,potassium fixation factor,KFF,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_KFF_003,SOIL,potassium fixation factor,KFF,Mehlich 3 ,MEHLICH_3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_001,SOIL,potassium index,PINDEX,Mehlich 3 ,MEHLICH_3,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_PINDEX_002,SOIL,potassium index,PINDEX,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,CALCULATION,None,none,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_KINDEX_001,SOIL,potassium index,KINDEX,Mehlich 3 ,MEHLICH_3,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_KINDEX_002,SOIL,potassium index,KINDEX,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_TK_001,SOIL,"potassium, total ",TK,Kjeldahl,KJELDAHL,18 M H2SO4,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TK_002,SOIL,"potassium, total ",TK,Kjeldahl,KJELDAHL,18 M H2SO4,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TK_003,SOIL,"potassium, total ",TK,Nitric Acid,NITRIC_ACID,Nitric Acid,,,,,,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_POTMN_001,SOIL,potential mineralizable nitrogen,POTMN,Permanganate Mineralizable Nitrogen ,PERMANGANATE_MINERALIZABLE_NITROGEN,,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,INVALID,,,,13-Nov-24,,
-L_MODV2_SOIL_POTMN_002,SOIL,potential mineralizable nitrogen,POTMN,Permanganate Mineralizable Nitrogen ,PERMANGANATE_MINERALIZABLE_NITROGEN,,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_POTMN_003,SOIL,potential mineralizable nitrogen,POTMN,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,3:25,m/v,16 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 7d, pp 134-140",,13-Nov-24,,
-L_MODV2_SOIL_POTOXC_001,SOIL,potential oxidizable carbon,POTOXC,"Permanganate, Oxidizable Carbon ",PERMANGANATE_OXIDIZABLE_CARBON,,,,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_POTMN_001,SOIL,potentially mineralizable nitrogen (PMN),POTMN,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,3:25,m/v,16 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,INVALID,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 7d, pp 134-140",,13-Nov-24,,
-L_MODV2_SOIL_XSL_001,SOIL,reactive soil carbonates,XSL,Excess lime ,EXCESS_LIME,1.0 N HCl,,,,Visual,VISUAL,OBSERVED,Description,description,EXPERIMENTAL,VALID,USDA,"Soil Science Division Staff. 2017. Soil survey manual. C. Ditzler, K. Scheffe, and H.C. Monger (eds.). USDA Handbook 18. Government Printing Office, Washington, D.C., pg. 199-200.",,13-Nov-24,,
-L_MODV2_SOIL_SREF_001,SOIL,reflectance,SREF,Reflectance,REFLECTANCE,Diffuse reflectance spectroscopy,1:10,m/v,,Reflectance,REFLECTANCE,MEASURED,%,prcnt,OFFICIAL,VALID,Soil Health Institute,"Veum, et al., 2015",,13-Nov-24,,
-L_MODV2_SOIL_RZM_001,SOIL,rootzone moisture,RZM,"Drying, Depth & Bulk Density",DRYING_DEPTH_AND_BULK_DENSITY,,,,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SAND_001,SOIL,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m, ,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA < 2.0 to  > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SAND_002,SOIL,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Laser Diffraction,1:20 (varies),m/m,5 min,Diffraction,DIFFRACTION,MEASURED,%,prcnt,PROVISIONAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",USDA < 2.0 to  > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SAND_003,SOIL,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sedimentation / Hydrometer,1:20 (varies),m/m,5 min,Hydrometer,HYDROMETER,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",USDA < 2.0 to  > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SAND_004,SOIL,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,5 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",USDA < 2.0 to  > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDC_001,SOIL,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 1.0 to > 0.5 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDC_002,SOIL,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 1.0 to > 0.5 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDC_003,SOIL,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 1.0 to > 0.5 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDC_004,SOIL,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Dispersion / Sieve / Weigh, 500 - 1000 um",1:20 (varies),m/m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),Uified > 2.0 to < 4.8 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDF_001,SOIL,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 0.25 to > 0.10 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDF_002,SOIL,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 0.25 to > 0.10 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDF_003,SOIL,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m,,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA 0.25 to > 0.10 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDF_004,SOIL,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Dispersion / Sieve / Weigh, 150 - 250 um",1:20 (varies),m/m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),Unified > 0.074 to < 0.42 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDM_001,SOIL,sand - medium,SANDM,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Dispersion / Sieve / Weigh, 250 - 500 um",1:20 (varies),m/m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),Unified > 0.42 ro < 2.0 mm,13-Nov-24,,
-L_MODV2_SOIL_SANDVC_001,SOIL,sand - very coarse,SANDVC,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Dispersion / Sieve / Weigh, 1000 - 2000 um",1:20 (varies),m/m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,13-Nov-24,,
-L_MODV2_SOIL_SANDVF_001,SOIL,sand - very fine,SANDVF,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,"Dispersion / Sieve / Weigh, 50 - 150 um",1:20 (varies),m/m,120 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,13-Nov-24,,
-L_MODV2_SOIL_SHC_001,SOIL,saturated hydraulic conductivity,SHC,Head Method,HEAD_METHOD,Two-ponding head method in field with Saturo™,Saturation,Saturation,Varies,Volume,VOLUME,MEASURED,cm/hr,cm1hr-1,OFFICIAL,VALID,Soil Health Institute,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 3.4.3.  Field Methods (Vadose and Saturated Zone Techniques), pages 817-843./ Saturo™ (https://www.metergroup.com/en/meter-environment/products/saturo-infiltrometer-field-saturated-hydraulic-conductivity)",,13-Nov-24,,
-L_MODV2_SOIL_SATPP_001,SOIL,saturation paste %,SATPP,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SE_001,SOIL,selenium,SE,Aqua Regia,AQUA_REGIA,Aqua Regia (3:1 mixture of hydrochloric (HCl) and nitric (HNO3) acids),1:10,m/v,20 min,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,ISO,ISO standard 11466 or EPA 3051A,,13-Nov-24,,
-L_MODV2_SOIL_SE_002,SOIL,selenium,SE,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_SE_003,SOIL,selenium,SE,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_SE_004,SOIL,selenium,SE,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / ICP-MS,ICP-OES_ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_SE_005,SOIL,selenium,SE,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_SE_006,SOIL,selenium,SE,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_STCM_001,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_002,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_003,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_004,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,CO2 Paddle,CO2_PADDLE,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,SUPERSEDED,Woods End Laboratories,Solvita Gel System; https://solvita.com/co2-burst/,,13-Nov-24,,
-L_MODV2_SOIL_STCM_005,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_006,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_007,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_008,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_009,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_010,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_011,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_012,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Infrared gas analyzer( IRGA),IRGA,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_STCM_013,SOIL,short-term carbon mineralization,STCM,Incubation,INCUBATION,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 Days,Titration,TITRATION,MEASURED,mg/kg,mg1kg-1,OFFICIAL,SUPERSEDED,Soil Health Institute,"Zibilske, 1994",,13-Nov-24,,
-L_MODV2_SOIL_SI_001,SOIL,silicon,SI,Acetic Acid,ACETIC_ACID,0.5 M Acetic Acid,1:2.5,m/v,"Stand for 20 hr, shake for 50 min",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 12.",,13-Nov-24,,
-L_MODV2_SOIL_SI_002,SOIL,silicon,SI,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_SI_003,SOIL,silicon,SI,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_SI_004,SOIL,silicon,SI,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SI_005,SOIL,silicon,SI,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,EXPERIMENTAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SI_006,SOIL,silicon,SI,Sulfuric Acid,SULFURIC_ACID,0.005 M H2SO4,,m/v,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SILT_001,SOIL,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sieve / Weigh,1:20 (varies),m/m, ,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",USDA .02 to > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SILT_002,SOIL,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Laser Diffraction,1:20 (varies),m/m,5 min,Diffraction,DIFFRACTION,MEASURED,%,prcnt,PROVISIONAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",USDA .02 to > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SILT_003,SOIL,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sedimentation / Hydrometer,1:20 (varies),m/m,5 min,Hydrometer,HYDROMETER,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",USDA .02 to > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SILT_004,SOIL,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,SODIUM_HEXAMETAPHOSPHATE_SOLUTION_ELECTRICAL_MIXER,Dispersion / Sedimentation / Pipette / Weigh,1:20 (varies),m/m,5 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",USDA .02 to > 0.05 mm,13-Nov-24,,
-L_MODV2_SOIL_SILTCLAY_001,SOIL,silt+clay,SILTCLAY,Calculation,CALCULATION,Calculation,1:20 (varies),Calculation,Calculation,Gravimetric,GRAVIMETRIC,CALCULATION,%,prcnt,OFFICIAL,VALID,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",USDA < 0.05mm,13-Nov-24,,
-L_MODV2_SOIL_AG_001,SOIL,silver,AG,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_SLAKING_001,SOIL,slaking,SLAKING,Slurry,SLURRY,,,,120 min,Observation,OBSERVATION,MEASURED,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_001,SOIL,sodium,NA,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_NA_002,SOIL,sodium,NA,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_003,SOIL,sodium,NA,Ammonium Chloride,AMMONIUM_CHLORIDE,NH4Cl w/ prewash,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_004,SOIL,sodium,NA,Ammonium Chloride/Barium Chloride,AMMONIUM_CHLORIDE_BARIUM_CHLORIDE,NH4Cl/BaCl2,,,,ICP-OES,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_005,SOIL,sodium,NA,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_NA_006,SOIL,sodium,NA,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_NA_007,SOIL,sodium,NA,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_NA_008,SOIL,sodium,NA,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_NA_009,SOIL,sodium,NA,H3A-1,H3A-1,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_010,SOIL,sodium,NA,Lancaster Extraction,LANCASTER_EXTRACTION,,,,,ICP,ICP,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_011,SOIL,sodium,NA,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_NA_012,SOIL,sodium,NA,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_NA_013,SOIL,sodium,NA,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_NA_014,SOIL,sodium,NA,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_NA_015,SOIL,sodium,NA,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_016,SOIL,sodium,NA,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_017,SOIL,sodium,NA,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl,,,,"ICP, AAS",ICP_AAS,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_018,SOIL,sodium,NA,Resin Extraction - Unibest,RESIN_EXTRACTION_-_UNIBEST,,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_019,SOIL,sodium,NA,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_NA_020,SOIL,sodium,NA,Slurry,SLURRY,Dionized Water,1:1,,,ICP,ICP,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_021,SOIL,sodium,NA,Slurry,SLURRY,Dionized Water,20:1,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_022,SOIL,sodium,NA,Slurry,SLURRY,Dionized Water,5:1,,,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_023,SOIL,sodium,NA,Slurry,SLURRY,Dionized Water,5:1,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_NA_024,SOIL,sodium,NA,,,,,,,Calculation,CALCULATION,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SAR_001,SOIL,sodium adsorption ratio,SAR,Ammonium Acetate,AMMONIUM_ACETATE,Ammonium Acetate,Calculation,Calculation,Calculation,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SAR_002,SOIL,sodium adsorption ratio,SAR,Slurry,SLURRY,Deionized Water,1:5,m/m,,ICP-OES / AAS,ICP-OES_AAS,CALCULATION,ratio,ratio,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SAR_003,SOIL,sodium adsorption ratio,SAR,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Calculation,CALCULATION,MEASURED,ratio,ratio,OFFICIAL,VALID,"USDA, WERA-103","US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SOLIDS_001,SOIL,"solids, total",SOLIDS,,,,,,,Calculation,CALCULATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SS_001,SOIL,soluble salts,SS,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Electrical Conductivity,ELECTRICAL_CONDUCTIVITY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SSINDEX_001,SOIL,soluble salts index,SSINDEX,,,,,,,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_SR_001,SOIL,strontium,SR,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_SR_002,SOIL,strontium,SR,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SO4S_001,SOIL,sulfate-sulfur,SO4S,Calcium Phosphate,CALCIUM_PHOSPHATE,Calcium Phosphate,1:2.5,m/v,30 min,Turbidimetric,TURBIDIMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,13-Nov-24,,
-L_MODV2_SOIL_SO4S_002,SOIL,sulfate-sulfur,SO4S,Calcium Phosphate,CALCIUM_PHOSPHATE,Calcium Phosphate,1:2.5,m/v,30 min,Turbidimetric,TURBIDIMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,13-Nov-24,,
-L_MODV2_SOIL_SO4S_003,SOIL,sulfate-sulfur,SO4S,Slurry,SLURRY,Deionized Water,1:1,m/v,,XRF-IMP,XRF-IMP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SO4S_004,SOIL,sulfate-sulfur,SO4S,Slurry,SLURRY,Deionized Water,1:1,m/v,,Turbidimetric,TURBIDIMETRIC,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_SO4S_005,SOIL,sulfate-sulfur,SO4S,EPA 300.0,EPA_300_0,Deionized water - EPA 300.0,1:10,m/v,10 min,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,13-Nov-24,,
-L_MODV2_SOIL_SO4S_006,SOIL,sulfate-sulfur,SO4S,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,ION_CHROMATOGRAPHY,MEASURED,meq/L,meq1l-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SO4S_007,SOIL,sulfate-sulfur,SO4S,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Turbidimetric,TURBIDIMETRIC,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_S_001,SOIL,sulfur,S,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_S_002,SOIL,sulfur,S,Ammonium Acetate,AMMONIUM_ACETATE,"1.0 N Ammonium Acetate, pH 7.0",1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,13-Nov-24,,
-L_MODV2_SOIL_S_003,SOIL,sulfur,S,Ammonium Acetate,AMMONIUM_ACETATE,,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_004,SOIL,sulfur,S,Calcium Chloride,CALCIUM_CHLORIDE,Calcium Chloride,,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_005,SOIL,sulfur,S,Calcium Chloride,CALCIUM_CHLORIDE,Calcium Chloride,,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Shirisha, K., K.L. Sahrawat, K.V.S. Murthy, S.P. Wani, P.N. Gajbhiye, and S. Kundu. 2010. Comparative evaluation of ICP-AES and turbidimetric methods for determining extractable sulfur in soils. Jour. Indian Soc. Soil Sci. 58:323-326.",,13-Nov-24,,
-L_MODV2_SOIL_S_006,SOIL,sulfur,S,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_S_007,SOIL,sulfur,S,Calcium Phosphate,CALCIUM_PHOSPHATE,Calcium Phosphate,1:2.5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,13-Nov-24,,
-L_MODV2_SOIL_S_008,SOIL,sulfur,S,Calcium Phosphate,CALCIUM_PHOSPHATE,Calcium Phosphate,1:2.5,m/v,30 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,13-Nov-24,,
-L_MODV2_SOIL_S_009,SOIL,sulfur,S,Combustion,COMBUSTION,Combustion,N/A,m,,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_010,SOIL,sulfur,S,Slurry,SLURRY,Deionized Water,1:5,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_011,SOIL,sulfur,S,Slurry,SLURRY,Deionized Water,1:1,m/v,,ICP-OES,ICP-OES,MEASURED,meq/L,meq1l-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_012,SOIL,sulfur,S,Slurry,SLURRY,Deionized Water,1:1,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_013,SOIL,sulfur,S,Slurry,SLURRY,Deionized Water,1:20,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_014,SOIL,sulfur,S,Slurry,SLURRY,Deionized Water,1:5,m/v,,XRF-IMP,XRF-IMP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_015,SOIL,sulfur,S,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_S_016,SOIL,sulfur,S,EPA 3050,EPA_3050,"EPA 3050 Digestion (Nitric Acid, Hydrogen Peroxide), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_S_017,SOIL,sulfur,S,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_S_018,SOIL,sulfur,S,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_S_019,SOIL,sulfur,S,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_S_020,SOIL,sulfur,S,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_S_021,SOIL,sulfur,S,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_S_022,SOIL,sulfur,S,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_S_023,SOIL,sulfur,S,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_S_024,SOIL,sulfur,S,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_S_025,SOIL,sulfur,S,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_S_026,SOIL,sulfur,S,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,"SERA-6, NCERA-13, NEC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_S_027,SOIL,sulfur,S,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_S_028,SOIL,sulfur,S,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_S_029,SOIL,sulfur,S,Modified Morgan,MODIFIED_MORGAN,Modified Morgan,1:4,v/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_S_030,SOIL,sulfur,S,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_S_031,SOIL,sulfur,S,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_S_032,SOIL,sulfur,S,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_S_033,SOIL,sulfur,S,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_S_034,SOIL,sulfur,S,Potassium Chloride,POTASSIUM_CHLORIDE,0.25M KCl at 40C,,m/v,,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,,"Blair, Graeme J., et al. ""Sulfur soil testing."" Plant and soil 155.1 (1993): 383-386.",,13-Nov-24,,
-L_MODV2_SOIL_S_035,SOIL,sulfur,S,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 N KCl,,m/v,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_S_036,SOIL,sulfur,S,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,ICP-OES,MEASURED,meq/L,meq1l-1,OFFICIAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_SINDEX_001,SOIL,sulfur index,SINDEX,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,CALCULATION,None,none,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TEXTURE_001,SOIL,textural classification,TEXTURE,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Gravimetric,GRAVIMETRIC,CALCULATION,Description,description,OFFICIAL,VALID,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",,13-Nov-24,,
-L_MODV2_SOIL_TEXTURE_002,SOIL,textural classification,TEXTURE,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Modeled on micro-pipette PSA,MODELED_ON_MICRO-PIPETTE_PSA,MEASURED,None,description,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_TEXTURE_003,SOIL,textural classification,TEXTURE,Calculation,CALCULATION,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,MEASURED,Description,description,OFFICIAL,VALID,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",,13-Nov-24,,
-L_MODV2_SOIL_SN_001,SOIL,tin,SN,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_SN_002,SOIL,tin,SN,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_SN_003,SOIL,tin,SN,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_TITACIDT_001,SOIL,titratable acidity,TITACIDT,,,,,,,Titration,TITRATION,MEASURED,mEq/100g,mEq1hg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_PZNRATIO_001,SOIL,P:Zn ratio,PZNRATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_TCTN_001,SOIL,total carbon:total nitrogen,TCTN,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_UNKNOWN_001,SOIL,unknown,UNKNOWN,,,,,,,,,MEASURED,None,none,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_UREA_001,SOIL,urea,UREA,Diacetyl Monoxime,DIACETYL_MONOXIME,"2M KCI, phenylmercuric acetate (PMA)",1:10,m,60 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 34.",,13-Nov-24,,
-L_MODV2_SOIL_WEN_001,SOIL,water extractable nitrogen (WEN),WEN,Water / Reciprocating Shaker / Centrifuge,WATER_RECIPROCATING_SHAKER_CENTRIFUGE,Deionized water,1:20,m/m,10 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,13-Nov-24,,
-L_MODV2_SOIL_WEOC_001,SOIL,water extractable organic carbon (WEOC),WEOC,Slurry,SLURRY,Deionized water,1:10,m/v,10 min,TOC Analyzer,TOC_ANALYZER,MEASURED,g,g,EXPERIMENTAL,VALID,,"Cookson, W. R., Murphy, D. V., and Roper, M. M. (2008). Characterizing the relationships between soil organic matter components and microbial function and composition along a tillage disturbance gradient. Soil Biol. Biochem. 40, 763–777. doi: 10.1016/j.soilbio.2007.10.011",,13-Nov-24,,
-L_MODV2_SOIL_TDN_001,SOIL,water extractable organic nitrogen (TDN),TDN,Slurry,SLURRY,Deionized water,1:10,m/v,10 min,TN Analyzer,TN_ANALYZER,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Cookson, W. R., Murphy, D. V., and Roper, M. M. (2008). Characterizing the relationships between soil organic matter components and microbial function and composition along a tillage disturbance gradient. Soil Biol. Biochem. 40, 763–777. doi: 10.1016/j.soilbio.2007.10.011",,13-Nov-24,,
-L_MODV2_SOIL_WEON_001,SOIL,water extractable organic nitrogen (WEON),WEON,Water / Reciprocating Shaker / Centrifuge,WATER_RECIPROCATING_SHAKER_CENTRIFUGE,Deionized water,1:20,m/m,10 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,13-Nov-24,,
-L_MODV2_SOIL_TOCTN_001,SOIL,total organic carbon: total nitrogen,TOCTN,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_WSC_001,SOIL,water soluble carbon,WSC,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,13-Nov-24,,
-L_MODV2_SOIL_WSOC_001,SOIL,water-soluble organic carbon (WSOC),WSOC,Water / Reciprocating Shaker / Centrifuge,WATER_RECIPROCATING_SHAKER_CENTRIFUGE,Water Extraction,1:20,m/m,10 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_001,SOIL,zinc,ZN,Calcium Chloride,CALCIUM_CHLORIDE,0.01 M CaCl2,1:10,m/v,120 min,ICP-MS,ICP-MS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_002,SOIL,zinc,ZN,DTPA,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",1:2,m/v,120 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,13-Nov-24,,
-L_MODV2_SOIL_ZN_003,SOIL,zinc,ZN,DTPA-Sorbitol,DTPA-SORBITOL,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20M of Sorbitol, adjusted to pH 7.3 and .)",1:2,m/v,120 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,13-Nov-24,,
-L_MODV2_SOIL_ZN_004,SOIL,zinc,ZN,EDTA,EDTA,EDTA (0.04 M EDTA),1:2.5,m/v,120 min,AAS,AAS,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,13-Nov-24,,
-L_MODV2_SOIL_ZN_005,SOIL,zinc,ZN,EPA 3050A/B,EPA_3050A_B,"EPA 3050A/B Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES)",1:15 (varies),m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_006,SOIL,zinc,ZN,EPA 3051A/B,EPA_3051A_B,"EPA 3051A/B Microwave Digestion (Nitric Acid, Hydrochloric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_ZN_007,SOIL,zinc,ZN,EPA 3052,EPA_3052,"EPA 3052 MIcrowave Digestion (Nitric Acid, Hydrofluoric Acid), EPA 6010B Determination (ICP-OES) ",1:10,,,,,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,US-EPA,,,13-Nov-24,,
-L_MODV2_SOIL_ZN_008,SOIL,zinc,ZN,H3A-1,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),1:10,m/v,10 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROVISIONAL,VALID,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_009,SOIL,zinc,ZN,Hydrochloric Acid,HYDROCHLORIC_ACID,0.1 M HCl,1:4,m/v,30 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,"NCERA-13, NEC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,13-Nov-24,,
-L_MODV2_SOIL_ZN_010,SOIL,zinc,ZN,Ion Exchange Resin,ION_EXCHANGE_RESIN,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,PROPRIETARY,VALID,"UniBest, Inc",https://www.unibestinc.com/about,,13-Nov-24,,
-L_MODV2_SOIL_ZN_011,SOIL,zinc,ZN,Lancaster,LANCASTER,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",1:5,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,13-Nov-24,,
-L_MODV2_SOIL_ZN_012,SOIL,zinc,ZN,Mehlich 1,MEHLICH_1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),1:5,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,13-Nov-24,,
-L_MODV2_SOIL_ZN_013,SOIL,zinc,ZN,Mehlich 2,MEHLICH_2,Mehlich 2 (0.2N CH3COOH + 0.015N NH4F + 0.2N NH4Cl + 0.012N HCl),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_014,SOIL,zinc,ZN,Mehlich 3 ,MEHLICH_3,Mehlich 3 to DTPA (Calculation),Calculation,Calculation,Calculation,ICP-OES,ICP-OES,CALCULATION,mg/kg,mg1kg-1,EXPERIMENTAL,VALID,,,,13-Nov-24,,
-L_MODV2_SOIL_ZN_015,SOIL,zinc,ZN,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,m/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_ZN_016,SOIL,zinc,ZN,Mehlich 3 ,MEHLICH_3,Mehlich 3 (0.2N CH3COOH + 0.25N NH4NO3 + 0.013N HNO3 + 0.015N NH4F + 0.001M EDTA),1:10,v/v,5 min,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,OFFICIAL,VALID,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,13-Nov-24,,
-L_MODV2_SOIL_ZN_017,SOIL,zinc,ZN,Morgan,MORGAN,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),1:5,v/v,15 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_018,SOIL,zinc,ZN,Modified Morgan,MODIFIED_MORGAN,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),1:10,m/v,15 min,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_019,SOIL,zinc,ZN,Nitric Acid,NITRIC_ACID,,,,,ICP,ICP,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ZN_020,SOIL,zinc,ZN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS (0.5 M HCl),Saturated paste,in situ probe,60 min acid leaching,ICP-OES,ICP-OES,MEASURED,mg/L,mg1L-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_021,SOIL,zinc,ZN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_022,SOIL,zinc,ZN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_023,SOIL,zinc,ZN,Plant Root Simulator,PLANT_ROOT_SIMULATOR,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,PROPRIETARY,VALID,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,13-Nov-24,,
-L_MODV2_SOIL_ZN_024,SOIL,zinc,ZN,Saturated paste,SATURATED_PASTE,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES / AAS,ICP-OES_AAS,MEASURED,mg/L,mg1L-1,PROVISIONAL,VALID,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,13-Nov-24,,
-L_MODV2_SOIL_ZINDEX_001,SOIL,zinc index,ZINDEX,Mehlich 3 ICP,MEHLICH_3_ICP,,,,,"ICP, AAS",ICP_AAS,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ZNCURATIO_001,SOIL,Zn:Cu ratio,ZNCURATIO,Mehlich 3 ,MEHLICH_3,,,,,ICP,ICP,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
-L_MODV2_SOIL_ZNCURATIO_002,SOIL,Zn:Cu ratio,ZNCURATIO,,,,,,,Calculation,CALCULATION,MEASURED,ratio,ratio,EXPERIMENTAL,RETIRED,,,,13-Nov-24,,
+Matrix,v2Code,Analyte,Analyte Code,Common Method Name,Extraction reagents/formulation,Extraction Ratio,Extraction Basis,Extraction Time,Analyte Measurement Method,Observation Category,Reporting Unit,UoM Code,QUDT Code,QUDT URI,Citation Organization,Citation,Citation Link,Acceptance,Status,Row Added Date,Row Changed Date,Change Comment,Notes
+SOIL,L_MODV2_SOIL_ACEN_001,ACE nitrogen (soil protein index),ACEN,Soil Protein,Autoclaved Citrate Extractable,0.046527778,m/v,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Schindelbeck, 2016",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ACEN_002,ACE nitrogen (soil protein index),ACEN,Soil Protein,Autoclaved Citrate Extractable,0.046527778,m/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Schindelbeck, 2016",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ACIDT_001,acidity,ACIDT,Barium Chloride,Barium Chloride titration,0.083333333,,120 min,H+ ISE,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,SSSA,"Hendershot, W. and M. Duquette. 1986. A simple barium chloride method for determining cation exchange capacity and exchangeable cations. Soil Science Society of America journal, 50(3), pp.605-608.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ACIDT_002,acidity,ACIDT,,,,,,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASAR_001,adjusted sodium adsorption ratio,ASAR,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_ASTAB_001,aggregate stability,ASTAB,Image recognition,Image recognition,,,,Spectral analysis,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Farjardo,et al., 2016",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASTAB_002,aggregate stability,ASTAB,Incubation,Slake test,,,,Observation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_ASTAB_003,aggregate stability,ASTAB,Wet Sieving,Eijkamp method,0.045138889,v/v,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Kemper and Rosenau, 1986. Aggregate Stability and Size Distribution,  Methods of Soil Analysis: Part 1 Physical and Mineralogical Methods, 5.1, Second Edition, Chapter 17",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASTAB_004,aggregate stability,ASTAB,Wet Sieving,Wet seive,0.045138889,v/v,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Franzluebbers, et al., 2000",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASTAB_005,aggregate stability,ASTAB,Slaking From Raindrop Impact,Deionized Water,0.0625,Slaking,5 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH03-Wet-Aggregate-Stability-SOP-4-2022.pdf,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASTAB_006,aggregate stability,ASTAB,Volumetric Aggergrate Stability Test,Deionized Water,,Calculation,3 min,Volume,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Woods End Laboratories,,,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ASTAB_007,aggregate stability,ASTAB,Image recognition,Image recognition,,Slaking,10 min,Calculation,CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,Soil Health Institute,https://soilhealthinstitute.org/app/uploads/2022/06/SOP_AggStability_ImageRecogn_simplified_v1.2.pdf,,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_001,aluminum,AL,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,https://www.naptprogram.org/files/napt/western-states-method-manual-2005.pdf,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_002,aluminum,AL,Ammonium Oxalate,Acid Ammonium Oxalate,,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,CSSS,"Ross, G. J. and Wang C. 1993. Extractable Al, Fe, Mn, and Si. pp. 239-246. In: Carter, M. R. (ed), Soil Sampling and Methods of Analysis, Canadian Society of Soil Sciences, Lewis Publishers, Ann Arbor, MI.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_003,aluminum,AL,"Aqua Regia, Modified","Reverse Aqua Regia (HCl:HNO3, 1:3)",0.048611111,m/v,20 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Reverse Aqua Regia (1:3 mixture of hydro"" → ""Reverse Aqua Regia (HCl:HNO3, 1:3)""",
+SOIL,L_MODV2_SOIL_AL_004,aluminum,AL,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_005,aluminum,AL,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_006,aluminum,AL,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_AL_007,aluminum,AL,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AL_008,aluminum,AL,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_AL_009,aluminum,AL,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_AL_010,aluminum,AL,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_011,aluminum,AL,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_012,aluminum,AL,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_AL_013,aluminum,AL,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_AL_014,aluminum,AL,Nitric Acid,HNO3,,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_AL_015,aluminum,AL,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_016,aluminum,AL,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_017,aluminum,AL,Plant Root Simulator,Plant Root Simulator - PRS,Field Capacity,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_018,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_019,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_020,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_021,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_022,aluminum,AL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_023,aluminum,AL,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_AL_024,aluminum,AL,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_025,aluminum,AL,Potassium Chloride,0.2 M CaCl2,0.045138889,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ASPAC,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AL_026,aluminum,AL,Ammonium Oxalate,Acid Ammonium Oxalate,,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,CSSS,"Ross, G. J. and Wang C. 1993. Extractable Al, Fe, Mn, and Si. pp. 239-246. In: Carter, M. R. (ed), Soil Sampling and Methods of Analysis, Canadian Society of Soil Sciences, Lewis Publishers, Ann Arbor, MI.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_027,aluminum,AL,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_028,aluminum,AL,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_029,aluminum,AL,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AL_030,aluminum,AL,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_031,aluminum,AL,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_032,aluminum,AL,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_033,aluminum,AL,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_034,aluminum,AL,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_035,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_036,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_037,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_038,aluminum,AL,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_039,aluminum,AL,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_040,aluminum,AL,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AL_041,aluminum,AL,Potassium Chloride,0.2 M CaCl2,0.045138889,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AMINON_001,amino nitrogen,AMINON,Boric Acid,NH2 Release (Boric Acid),,,,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AMINON_002,amino nitrogen,AMINON,Boric Acid,NH2 Release (Boric Acid),,,,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4_001,ammonium,NH4,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,Spectrophotometric,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4_002,ammonium,NH4,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4_003,ammonium,NH4,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_001,ammonium-nitrogen,NH4N,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_002,ammonium-nitrogen,NH4N,Slurry,Deionized Water,0.042361111,m/m,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_003,ammonium-nitrogen,NH4N,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Communications in Soil Science and Plant Analysis 41(12):1513-1523, DOI:10.1080/00103624.2010.482173",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_004,ammonium-nitrogen,NH4N,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_005,ammonium-nitrogen,NH4N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_006,ammonium-nitrogen,NH4N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Diffusion Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_NH4N_007,ammonium-nitrogen,NH4N,Potassium Chloride,0.5 M KCl,0.045138889,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_008,ammonium-nitrogen,NH4N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NH4N_009,ammonium-nitrogen,NH4N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_010,ammonium-nitrogen,NH4N,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_011,ammonium-nitrogen,NH4N,Slurry,Deionized Water,0.042361111,m/m,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_012,ammonium-nitrogen,NH4N,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Communications in Soil Science and Plant Analysis 41(12):1513-1523, DOI:10.1080/00103624.2010.482173",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_013,ammonium-nitrogen,NH4N,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_014,ammonium-nitrogen,NH4N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_015,ammonium-nitrogen,NH4N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_016,ammonium-nitrogen,NH4N,Potassium Chloride,0.5 M KCl,0.045138889,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NH4N_017,ammonium-nitrogen,NH4N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SB_001,antimony,SB,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SB_002,antimony,SB,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AS_001,arsenic,AS,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_AS_002,arsenic,AS,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AS_003,arsenic,AS,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AS_004,arsenic,AS,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_AS_005,arsenic,AS,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_AS_006,arsenic,AS,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AS_007,arsenic,AS,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AS_008,arsenic,AS,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AS_009,arsenic,AS,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AS_010,arsenic,AS,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ARYLS_001,arylsulfatase,ARYLS,,Assay incubation,0.048611111,v/v,,Spectrophotometric,MEASURED,nmol/h/mg,nmol1hr-1mg-1,Needs QUDT Discussion,Needs QUDT Discussion,Soil Health Institute,"Klose, et al., 2011",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GAWC_001,available moisture content,GAWC,Available Moisture Tension,Pressure Plate,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_AWHC_001,available water holding capacity,AWHC,Slurry,Ceramic plate method measured at -33 kPa (-10 kPa for sandy soils) and -1500 kPa,0.044444444,v/v,,Gravimetric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Klute, 1986",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_AWHC_002,available water holding capacity,AWHC,Slurry,Ceramic plate method measured at -33 kPa (-10 kPa for sandy soils) and -1500 kPa,0.044444444,v/v,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Klute, 1986",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BA_001,barium,BA,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_BA_002,barium,BA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_BA_003,barium,BA,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_BA_004,barium,BA,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_BA_005,barium,BA,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_BA_006,barium,BA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BA_007,barium,BA,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BA_008,barium,BA,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BS_001,base saturation,BS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CABS_001,base saturation - Ca,CABS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CAMGBS_001,base saturation - Ca:Mg,CAMGBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_CAMGBS_002,base saturation - Ca:Mg,CAMGBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,VALID,2026-04-03T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAANDMGBS_001,base saturation - Ca+Mg,CAANDMGBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,#REF!,base saturation - Ca+Mg,CAANDMGBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_HBS_001,base saturation - H,HBS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_KBS_001,base saturation - K,KBS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_KMGBS_001,base saturation - K:Mg,KMGBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MGBS_001,base saturation - Mg,MGBS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MGKBS_001,base saturation - Mg:K,MGKBS,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NABS_001,base saturation - Na,NABS,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,https://aesl.ces.uga.edu/sera6/PUB/MethodsManualFinalSERA6.pdf,,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_BGLUCO_001,beta-glucosidase,BGLUCO,,Assay incubation,0.045138889,v/v,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Tabatabai, et al., 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_BGLUCO_002,beta-glucosidase,BGLUCO,,Assay incubation,0.045138889,v/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Tabatabai, et al., 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HCO3_001,bicarbonate,HCO3,Slurry,"Soil saturated with DI water, subsequent extraction and retained for analysis",,m/m,4 hrs,ICP-OES,CALCULATION,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HCO3_002,bicarbonate,HCO3,Slurry,"Soil saturated with DI water, subsequent extraction and retained for analysis",,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HCO3_003,bicarbonate,HCO3,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HCO3_004,bicarbonate,HCO3,Slurry,Deionized Water,0.042361111,v/v,,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_HCO3_005,bicarbonate,HCO3,,,,,,,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_001,boron,B,Calcium Chloride,"CaCl2 (NCERA, SERA, WERA.. All three different concentration of CaCl2) (Hot)",0.048611111,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_002,boron,B,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_003,boron,B,Slurry,"Water  (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in DI water. Make to 1 L volume with high quality, DI water. Curcumin method for spctrophotometer, Add 4mL of curcumin-oxide to 2mL extract. Evaporate on water bath. Add 25 mL alcohol.) (Hot)",0.043055556,m/v,Boil for 5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_004,boron,B,Slurry,"Water (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in deionized water. Make to 1 L volume with high quality, deionized water. ) (Hot)",0.043055556,m/v,Boil for 5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_005,boron,B,Slurry,Deionized Water,0.042361111,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_006,boron,B,Slurry,"Deionized Water Extraction (Deionized water, or substitue 0.01 M CaCl2 to reduce turbidity in the filtrate. )",0.043055556,m/v,Boil for 10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_007,boron,B,Slurry,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",0.045138889,m/v,Hot-water shaking bath for 30 minutes at 80C,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_008,boron,B,Slurry,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",0.045138889,m/v,Hot-water shaking bath for 30 minutes at 80C,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_009,boron,B,Slurry,Deionized Water,0.055555556,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_010,boron,B,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",,m/v,180 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.5",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_011,boron,B,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_012,boron,B,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_B_013,boron,B,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_B_014,boron,B,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_B_015,boron,B,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_016,boron,B,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_017,boron,B,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_018,boron,B,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_B_019,boron,B,Nitric Acid,HNO3,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Nitric Acid"" → ""HNO3""",
+SOIL,L_MODV2_SOIL_B_020,boron,B,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_021,boron,B,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_022,boron,B,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs / 16 hrs,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_B_023,boron,B,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_B_024,boron,B,Calcium Chloride,"CaCl2 (NCERA, SERA, WERA.. All three different concentration of CaCl2) (Hot)",0.048611111,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_025,boron,B,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_026,boron,B,Slurry,"Water  (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in DI water. Make to 1 L volume with high quality, DI water. Curcumin method for spctrophotometer, Add 4mL of curcumin-oxide to 2mL extract. Evaporate on water bath. Add 25 mL alcohol.) (Hot)",0.043055556,m/v,Boil for 5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_027,boron,B,Slurry,"Water (Extracting Solution: Dissolve 1 g of CaCl2 • 2H2O in deionized water. Make to 1 L volume with high quality, deionized water. ) (Hot)",0.043055556,m/v,Boil for 5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 10, p 10.1-10.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_028,boron,B,Slurry,Deionized Water,0.042361111,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_029,boron,B,Slurry,"Deionized Water Extraction (Deionized water, or substitue 0.01 M CaCl2 to reduce turbidity in the filtrate. )",0.043055556,m/v,Boil for 10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_030,boron,B,Slurry,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",0.045138889,m/v,Hot-water shaking bath for 30 minutes at 80C,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_031,boron,B,Slurry,"Deionized Water (Deionized water, or substitute 0.01 M CaCl2 to reduce turbidity in the filtrate.)",0.045138889,m/v,Hot-water shaking bath for 30 minutes at 80C,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_032,boron,B,Slurry,Deionized Water,0.055555556,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_033,boron,B,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_034,boron,B,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_B_035,boron,B,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_036,boron,B,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_037,boron,B,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_038,boron,B,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_039,boron,B,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_040,boron,B,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs / 16 hrs,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_B_041,boron,B,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_001,buffer pH,BPH,Adams-Evans,"Adams-Evans: 1.0 M KCl, 0.14 M p-nitrophenol + 0.24 M boric acid, pH 8.00",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_002,buffer pH,BPH,"Adams-Evans, Modified","Modified Adams-Evans:  1.0 M KCl + 0.22 M KH2PO4 + 0.24 M boric acid, pH 8.00",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_003,buffer pH,BPH,Calculation,Regressed soil Sikora Buffer pH,Calculation,Calculation,Calculation,Calculation,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_004,buffer pH,BPH,Mehlich Buffer,"Mehlich: 0.043 M acetic acid + 0.034 M triethanolamine + 0.8 M NH4Cl, 0.08 M BaCl2 + 0.08 M Na glycerophosphate, pH 6.60",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 2.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_005,buffer pH,BPH,"Mehlich Buffer, Modified","Mod Mehlich:  0.043 M acetic acid + 0.034 M triethanolamine + 0.8 M NH4Cl, 0.08 M CaCl2.2 H2O + 0.08 M Na glycerophosphate, pH 6.60",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.6",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_006,buffer pH,BPH,Moore-Sikora,"Moore-Sikora: 1.0 M KCl + 0.035 M MES + 0.13 M MOPS + 0.21 M boric acid, pH 7.92",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.8",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_007,buffer pH,BPH,Sikora 1,"Sikora 1:  2.0 M KCl + 0.089 M acetic acid + 0.031 M MES + 0.014 M imidazole + 0.070 M triethanolamine, pH of 7.70",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.4",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_BPH_008,buffer pH,BPH,Sikora 2,"Sikora 2: 1.0 M KCl + 0.089 M acetic acid + 0.031 M MES + 0.014 M imidazole + 0.070 M triethanolamine, pH 7.53",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.5",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BPH_009,buffer pH,BPH,SMP,"SMP: 0.013 M p-nitrophenol + 0.015 M K2CrO4 + 0.36 M CaCl2 + 0.0126 M Ca(CO2CH3)2, and 0.019 M triethanolamine, pH of 7.50",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_BPH_010,buffer pH,BPH,Woodruff,"Woodruff:  0.063 M Ca(CH3COOH)2 + 0.086 M p-nitrophenol + 0.072 M salicylic acid + 0.031 M NaOH, pH 7.00",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SSSA,"Woodruff, C. M. 1947. Soil Sci. Soc. Amer. Proc. 12:141-142.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_BPH_011,buffer pH,BPH,"Woodruff, Modified","Modified Woodruff: 0.063 M Ca(CH3COH) + 0.054 M Ca(OH)2 + 0.086 M p-nitrophenol + 0.072 M salicylic acid, pH 7.00",0.043055556,v/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 4, pp 4.5-4.6.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_BD_001,bulk density,BD,Clod,,,,,,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BD_002,bulk density,BD,Coarse,,,,,,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BD_003,bulk density,BD,Core Extraction,"Core method: diameter to be determined, (most likely 2-inch or 5.08 cm)",0.045138889,m/v,,Gravimetric,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,Soil Health Institute,"Blake and Hartge, 1986",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BD_004,bulk density,BD,Fine,,,,,,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BD_005,bulk density,BD,Scoop,,,,,,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_BD_006,bulk density,BD,,,,,,,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CNRATIO_001,C:N ratio,CNRATIO,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CNRATIO_002,C:N ratio,CNRATIO,Calculation,Calculation,Calculation,Calculation,Calculation,Combustion Analyzer,CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,SSSA,,,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CNRATIO_003,C:N ratio,CNRATIO,Calculation,Calculation,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,SSSA,,,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CNRATIO_004,C:N ratio,CNRATIO,Calculation,Calculation,Calculation,Calculation,Calculation,Haney Method,CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,SSSA,,,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAEMGP_001,Ca + exchangable Mg,CAEMGP,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAKRATIO_001,Ca:K ratio,CAKRATIO,,,,,,,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAMGRATIO_001,Ca:Mg ratio,CAMGRATIO,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_CAMGRATIO_001,Ca:Mg ratio,CAMGRATIO,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_CAMGRATIO_001,Ca:Mg ratio,CAMGRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_CAMGRATIO_001,Ca:Mg ratio,CAMGRATIO,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_CAMGRATIO_002,Ca:Mg ratio,CAMGRATIO,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,RETIRED,2026-04-03T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAMGRATIO_003,Ca:Mg ratio,CAMGRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2026-04-03T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAMGRATIO_004,Ca:Mg ratio,CAMGRATIO,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2026-04-03T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CANO3RATIO_001,Ca:NO3 ratio,CANO3RATIO,,,,,,,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CAMGKRATIO_001,Ca+Mg:K ratio,CAMGKRATIO,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_001,cadmium,CD,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_CD_002,cadmium,CD,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CD_003,cadmium,CD,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_CD_004,cadmium,CD,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_CD_005,cadmium,CD,EPA 6010B,,,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,OFFICIAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_006,cadmium,CD,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_007,cadmium,CD,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_008,cadmium,CD,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_009,cadmium,CD,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CD_010,cadmium,CD,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CD_011,cadmium,CD,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_012,cadmium,CD,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CD_013,cadmium,CD,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_014,cadmium,CD,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_015,cadmium,CD,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CD_016,cadmium,CD,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_001,calcium,CA,Alcohol Prewash/Ammonium Acetate,,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_002,calcium,CA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_003,calcium,CA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_004,calcium,CA,Ammonium Acetate,1.0 N Ammonium Acetate buffered to pH 8.5,0.048611111,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_005,calcium,CA,Ammonium Chloride,NH4Cl,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_006,calcium,CA,Ammonium Chloride,NH4Cl w/ prewash,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_007,calcium,CA,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_008,calcium,CA,Calcium Index,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),,,,,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CA_009,calcium,CA,Calculation,Mehlich 3 to Ammonium Acetate,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_010,calcium,CA,Slurry,Deionized Water,0.042361111,m/v,,ICP-OES,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_011,calcium,CA,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_012,calcium,CA,Slurry,Deionized Water,0.209027778,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_013,calcium,CA,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CA_014,calcium,CA,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_015,calcium,CA,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_016,calcium,CA,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_017,calcium,CA,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_018,calcium,CA,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_019,calcium,CA,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CA_020,calcium,CA,Mehlich 3,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_021,calcium,CA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CA_022,calcium,CA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CA_023,calcium,CA,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_024,calcium,CA,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_025,calcium,CA,Nitric Acid,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_CA_026,calcium,CA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_027,calcium,CA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CA_028,calcium,CA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_029,calcium,CA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_030,calcium,CA,Potassium Chloride,1.0 N KCl,,m/v,,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_031,calcium,CA,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CA_032,calcium,CA,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CA_033,calcium,CA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_034,calcium,CA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_035,calcium,CA,Ammonium Acetate,1.0 N Ammonium Acetate buffered to pH 8.5,0.048611111,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_036,calcium,CA,Calculation,Mehlich 3 to Ammonium Acetate,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_037,calcium,CA,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_038,calcium,CA,Slurry,Deionized Water,0.209027778,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_039,calcium,CA,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CA_040,calcium,CA,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_041,calcium,CA,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_042,calcium,CA,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_043,calcium,CA,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_044,calcium,CA,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_045,calcium,CA,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_046,calcium,CA,Mehlich 3,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_047,calcium,CA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_048,calcium,CA,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_049,calcium,CA,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_050,calcium,CA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_051,calcium,CA,Potassium Chloride,1.0 N KCl,,m/v,,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CA_052,calcium,CA,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CACO3_001,calcium carbonate,CACO3,Acetic Acid,Acetic Acid,,,,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CACO3_002,calcium carbonate,CACO3,Ammonium Oxalate,Acid Ammonium Oxalate,,,,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CACO3_003,calcium carbonate,CACO3,Pressure Calcimeter,HCl,0.00072338,,,CO2 Displacement,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Microbiological and Biochemical Properties, 5.2, 1994.  (91-7)",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Reagent abbreviation: ""Hydrochloric Acid"" → ""HCl"" | 2026-04-03: Final audit fixes applied",
+SOIL,L_MODV2_SOIL_CACO3_004,calcium carbonate,CACO3,Titration,"1.0 N HCl, Titration with 1.0 N NaOH",,,,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-1.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CACO3_005,calcium carbonate,CACO3,Weight Loss,"3.0 N HCl, Weight Loss CO2",2:10 to 5:10,,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-10.20",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CACO3_006,calcium carbonate,CACO3,Weight Loss,"1.0 N HCl, Pressure Transducer",0.042361111,,120 min,Pressure Transducer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_C_001,carbon,C,Slurry,Deionized Water,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_C_002,carbon,C,Slurry,Deionized Water,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_001,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CMP_002,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_003,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CMP_004,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,CO2 Paddle,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Woods End Laboratories,Solvita Gel System; https://solvita.com/co2-burst/,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CMP_005,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_006,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_007,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_008,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_009,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_010,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_011,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_012,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_013,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CMP_014,Carbon Mineralization Potential,CMP,Respiration,Solvita 24 Respiration,,,24 hrs,Spectrophotometric,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Woods End Laboratories, Mt. Vernon, ME.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_015,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,KOH,,,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba page 9,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_016,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,NaOH,,,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CMP_017,Carbon Mineralization Potential,CMP,Carbon Mineralization,4-day incubation followed by CO2 measurement by EC trap,0.838888889,m/v,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Cornell,"Mobius-Clune, et.al., 2016. Comprehensive Assessment of Soil Health. Soil Respiration, p 51-52. Third addition, Cornell University.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CMP_018,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_019,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Infrared gas analyzer (IRGA),MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_020,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_021,Carbon Mineralization Potential,CMP,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,CO2 Paddle,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Woods End Laboratories,Solvita Gel System; https://solvita.com/co2-burst/,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_022,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_023,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Infrared gas analyzer (IRGA),MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_024,Carbon Mineralization Potential,CMP,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_025,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_026,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Infrared gas analyzer (IRGA),MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_027,Carbon Mineralization Potential,CMP,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_028,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_029,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Infrared gas analyzer (IRGA),MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_030,Carbon Mineralization Potential,CMP,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_031,Carbon Mineralization Potential,CMP,Respiration,Solvita 24 Respiration,,,24 hrs,Spectrophotometric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Woods End Laboratories, Mt. Vernon, ME.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_032,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,KOH,,,4 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba page 9,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_033,Carbon Mineralization Potential,CMP,Short Term Carbon Mineralization,NaOH,,,4 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CMP_034,Carbon Mineralization Potential,CMP,Carbon Mineralization,4-day incubation followed by CO2 measurement by EC trap,0.838888889,m/v,4 days,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,"Mobius-Clune, et.al., 2016. Comprehensive Assessment of Soil Health. Soil Respiration, p 51-52. Third addition, Cornell University.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TC_001,"carbon, total",TC,Dry Combustion,O2,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed: ""Combustion"" → ""Dry Combustion"" | 2026-04-03: Final audit fixes applied",
+SOIL,L_MODV2_SOIL_CO3_001,carbonate,CO3,Acetic Acid,Acetic Acid,,,,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CO3_002,carbonate,CO3,Slurry,Deionized Water,0.042361111,m/v,,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO3_003,carbonate,CO3,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,CALCULATION,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO3_004,carbonate,CO3,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO3_005,carbonate,CO3,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO3QUAL_001,"carbonates, qualitative",CO3QUAL,Hydrochloric Acid,HCl Effervescence,,m/v,,Semi-Quantitative,OBSERVED,,none,UNITLESS,Needs QUDT Discussion,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-13.05",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Hydrochloric Acid Effervescence"" → ""HCl Effervescence""",
+SOIL,L_MODV2_SOIL_CEC_001,cation exchange capacity,CEC,Ammonium Acetate,Displacement - Ammonium Acetate,0.045138889,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CEC_002,cation exchange capacity,CEC,Ammonium Acetate,Displacement - Ammonium Acetate,0.059027778,m/v,Overnight,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,https://www.epa.gov/sites/production/files/2015-12/documents/9080.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_003,cation exchange capacity,CEC,Ammonium Acetate,Alcohol Prewash/Ammonium Acetate,0.055555556,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CEC_004,cation exchange capacity,CEC,Ammonium Acetate,1.0 N Ammonium Acetate buffered to pH 8.5,0.048611111,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CEC_005,cation exchange capacity,CEC,Barium Chloride,Displacement - Barium Chloride,0.045138889,m/v,30 min,"ICP-OES, AAS",MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-13.20",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_006,cation exchange capacity,CEC,Barium Chloride,"Displacement - BaCl2/AA, Acidity 1 M KCl",,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CEC_007,cation exchange capacity,CEC,Calcium Sulfate,Displacement - Calcium Sulfate,,m/v,,"ICP-OES, AAS",MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_008,cation exchange capacity,CEC,Calculation,Calculation,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, p 7.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CEC_009,cation exchange capacity,CEC,Potassium,Displacement - Potassium,,m/v,,"ICP-OES, AAS",MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_010,cation exchange capacity,CEC,Silver Thiourea,Displacement - Silver Thiourea,,m/v,4 hrs,"ICP-OES, AAS",MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,"Searle, P. L. ""The measurement of soil cation exchange properties using the single extraction, silver thiourea method-an evaluation using a range of New Zealand soils."" Soil Research 24.2 (1986): 193-200.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_011,cation exchange capacity,CEC,Sodium Acetate,Displacement - Sodium Acetate (EPA 9081),0.055555556,m/v,15 min,"ICP-OES, AAS",MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,US-EPA,https://www.epa.gov/sites/production/files/2015-12/documents/9081.pdf,,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CEC_012,cation exchange capacity,CEC,Ammonium Acetate,Displacement - Ammonium Acetate,0.045138889,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CEC_013,cation exchange capacity,CEC,Ammonium Acetate,Displacement - Ammonium Acetate,0.059027778,m/v,Overnight,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,https://www.epa.gov/sites/production/files/2015-12/documents/9080.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CEC_014,cation exchange capacity,CEC,Ammonium Acetate,Alcohol Prewash/Ammonium Acetate,0.055555556,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CEC_015,cation exchange capacity,CEC,Ammonium Acetate,1.0 N Ammonium Acetate buffered to pH 8.5,0.048611111,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-5.11",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CROSS_001,cation ratio of structural stability,CROSS,Slurry,Deionized Water,0.209027778,,,,CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CATANRATIO_001,cation:anion ratio,CATANRATIO,,,,,,,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_001,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2,0.00072338,m/v,15 min,Ion Chromatography,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.3-11.4",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_002,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2,0.00072338,m/v,15 min,ISE,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.2-11.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CL_003,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2,0.00072338,m/v,15 min,Spectrophotometric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 11, pp 11.1-11.2.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_004,chloride,CL,Calcium Nitrate,HgThiocyanate/Ca(NO3)2.4H2O,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_005,chloride,CL,Slurry,Deionized Water,0.042361111,m/v,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CL_006,chloride,CL,Slurry,Deionized Water,0.042361111,m/v,,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_007,chloride,CL,Slurry,Deionized Water,0.042361111,m/v,,Ion Chromatography,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_008,chloride,CL,Slurry,Deionized Water,0.042361111,m/v,,Chloridometer,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CL_009,chloride,CL,EPA 300.0,Deionized water - EPA 300.0,0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_010,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis, titration with Hg Thiocyanate",Saturated paste,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_011,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis, titration with AgNO3",Saturated paste,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_012,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Chloridometer,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_013,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_014,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ISE,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CL_015,chloride,CL,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_016,chloride,CL,Slurry,"DI water, subsequent extraction and retained for analysis, titration with Hg Thiocyanate",0.045138889,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_017,chloride,CL,Slurry,"DI water, subsequent extraction and retained for analysis, titration with AgNO3",0.045138889,m/m,4 hrs,Titration,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CL_018,chloride,CL,,1:5,1:5,m/m,,,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"2026-04-03: Fixed time-parsed value; Extraction Ratio and reagents restored to text ""1:5""",
+SOIL,L_MODV2_SOIL_CL_019,chloride,CL,,1:5,1:5,m/m,,Chloridometer,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"2026-04-03: Fixed time-parsed value; Extraction Ratio and reagents restored to text ""1:5""",
+SOIL,L_MODV2_SOIL_CL_020,chloride,CL,,1:5,1:5,m/v,,Spectrophotometric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"2026-04-03: Fixed time-parsed value; Extraction Ratio and reagents restored to text ""1:5""",
+SOIL,L_MODV2_SOIL_CL_021,chloride,CL,Slurry,Deionized Water,0.042361111,m/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CR_001,chromium,CR,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_CR_002,chromium,CR,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CR_003,chromium,CR,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_CR_004,chromium,CR,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_CR_005,chromium,CR,,EPA 3050 Digestion Acid Recoverable,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_CR_006,chromium,CR,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CR_007,chromium,CR,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CR_008,chromium,CR,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CR_009,chromium,CR,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CR_010,chromium,CR,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CR_011,chromium,CR,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CLAY_001,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 0.02 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CLAY_002,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Laser Diffraction,0.055555556,m/m,5 min,Diffraction,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 0.02 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CLAY_003,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sedimentation / Hydrometer,0.055555556,m/m,Varies,Hydrometer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 0.02 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CLAY_004,clay,CLAY,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sedimentation / Pipette / Weigh,0.055555556,m/m,5 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 0.02 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CO2RESP_001,CO2 respiration,CO2RESP,Respiration,Solvita 24 Respiration,,,24 hrs,Spectrophotometric,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Woods End Laboratories, Mt. Vernon, ME.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO2RESP_002,CO2 respiration,CO2RESP,Short Term Carbon Mineralization,KOH,,,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba page 9,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CO2RESP_003,CO2 respiration,CO2RESP,Short Term Carbon Mineralization,NaOH,,,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_CO_001,cobalt,CO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_CO_002,cobalt,CO,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CO_003,cobalt,CO,DTPA,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_CO_004,cobalt,CO,EPA 200.7,,,,,,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO_005,cobalt,CO,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CO_006,cobalt,CO,Mehlich 3,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_CO_007,cobalt,CO,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CO_008,cobalt,CO,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_CO_009,cobalt,CO,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_CO_010,cobalt,CO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO_011,cobalt,CO,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO_012,cobalt,CO,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CO_013,cobalt,CO,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CO_014,cobalt,CO,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CO_015,cobalt,CO,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_COLOR_001,color,COLOR,Munsell Color Chart,,,,,Observation,OBSERVED,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_001,copper,CU,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_002,copper,CU,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CU_003,copper,CU,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CU_004,copper,CU,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_005,copper,CU,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CU_006,copper,CU,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_CU_007,copper,CU,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_CU_008,copper,CU,EPA 6010B,,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_009,copper,CU,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_010,copper,CU,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CU_011,copper,CU,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_012,copper,CU,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CU_013,copper,CU,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CU_014,copper,CU,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CU_015,copper,CU,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_CU_016,copper,CU,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_017,copper,CU,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_018,copper,CU,Nitric Acid,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_CU_019,copper,CU,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_020,copper,CU,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_021,copper,CU,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_022,copper,CU,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_CU_023,copper,CU,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_CU_024,copper,CU,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_025,copper,CU,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_026,copper,CU,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_027,copper,CU,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_028,copper,CU,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_CU_029,copper,CU,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_030,copper,CU,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_031,copper,CU,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_032,copper,CU,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_033,copper,CU,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_034,copper,CU,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_035,copper,CU,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_036,copper,CU,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_037,copper,CU,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_038,copper,CU,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_039,copper,CU,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CU_040,copper,CU,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_CUINDEX_001,copper index,CUINDEX,Mehlich 3 ICP,,,,,"ICP-OES, AAS",CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_DM_001,deleterious material,DM,,,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_DINDEX_001,dispersion index,DINDEX,,,,,,Observation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_DON_001,dissolved organic nitrogen (DON),DON,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_DON_002,dissolved organic nitrogen (DON),DON,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EC_001,electrical conductivity,EC,EC Slurry,Deionized Water,0.042361111,m/m,10 min,Electrical Conductivity,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-2.20",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EC_002,electrical conductivity,EC,EC Slurry,Deionized Water,0.043055556,m/m,10 min,Electrical Conductivity,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-2.20",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EC_003,electrical conductivity,EC,EC Slurry,Deionized Water,0.045138889,m/m,10 min,Electrical Conductivity,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EC_004,electrical conductivity,EC,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Electrical Conductivity,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EC_005,electrical conductivity,EC,,,,,,Calculation,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ESI_001,electrochemical stability index,ESI,,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_EMERSON_001,emerson class,EMERSON,,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ENR_001,estimated nitrogen release,ENR,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SLINDEX_001,excess soil lime index,SLINDEX,Mehlich 3,0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA,0.048611111,m/m,5 min,ICP-OES,CALCULATION,Description,Description,,,USDA,"Soil Science Division Staff. 2017. Soil survey manual. C. Ditzler, K. Scheffe, and H.C. Monger (eds.). USDA Handbook 18. Government Printing Office, Washington, D.C., pg. 199-200.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Vocabulary normalization — controlled vocab alignment. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_XACIDT_001,exchangeable acidity,XACIDT,Potassium Chloride,1.0 M KCl,,,,Titration,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XAL_001,exchangeable aluminum,XAL,Potassium Chloride,1.0 M KCl,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XCAP_001,exchangeable calcium percentage,XCAP,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XH_001,exchangeable hydrogen,XH,Potassium Chloride,1.0 M KCl,,,,Titration,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XHP_001,exchangeable hydrogen percentage,XHP,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XMGP_001,exchangeable magnesium percentage,XMGP,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XKP_001,exchangeable potassium percentage,XKP,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XNAP_001,exchangeable sodium percentage,XNAP,Saturated paste,Deionized Water,Saturated paste,Saturated Paste,4 hrs,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_F_001,fluoride,F,EPA 300.0,Deionized water - EPA 300.0,0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GENOM_001,genomics,GENOM,Genomics,"16S rRNA, ITS, and shotgun metagenomics",0.048611111,,,,MEASURED,,none,UNITLESS,Needs QUDT Discussion,Soil Health Institute,"Thompson, et al., 2017;",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GTRI_001,grass tetany risk index,GTRI,Alcohol Prewash/Ammonium Acetate,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GTRI_002,grass tetany risk index,GTRI,Ammonium Acetate,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GTRI_003,grass tetany risk index,GTRI,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GRAVEL_001,gravel,GRAVEL,Sieve,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GYPREC_001,gypsum recommendation,GYPREC,,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HEAL_001,H+EALP,HEAL,SMP,,,,,Calculation,CALCULATION,none,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HM_001,humic matter,HM,FSPA 15(12)84,,,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HM_002,humic matter,HM,Humic Matter,0.2 N NaOH,0.069444444,v/v,16 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 5.5, pp 162-166.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HAL_001,hydrogen+aluminum,HAL,SMP,,,,,ISE,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_OH_001,hydroxide,OH,SM 2320 B (18th Ed.),,,,,Titration,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_001,iron,FE,Ammonium Oxalate,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",0.045138889,m/v,4 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_002,iron,FE,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_003,iron,FE,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_FE_004,iron,FE,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_005,iron,FE,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_006,iron,FE,EPA 3050 Digestion Acid Recoverable,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_FE_007,iron,FE,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_FE_008,iron,FE,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_FE_009,iron,FE,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_FE_010,iron,FE,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_011,iron,FE,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_012,iron,FE,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_013,iron,FE,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_FE_014,iron,FE,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_015,iron,FE,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_016,iron,FE,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_FE_017,iron,FE,Nitric Acid,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_FE_018,iron,FE,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_019,iron,FE,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_020,iron,FE,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_021,iron,FE,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_022,iron,FE,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_FE_023,iron,FE,Ammonium Oxalate,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",0.045138889,m/v,4 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_024,iron,FE,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_025,iron,FE,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_026,iron,FE,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_027,iron,FE,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_028,iron,FE,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_FE_029,iron,FE,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_030,iron,FE,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_031,iron,FE,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_032,iron,FE,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_033,iron,FE,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_034,iron,FE,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_035,iron,FE,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_036,iron,FE,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_FE_037,iron,FE,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.045138889,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH13-Modified-Morgan-Extraction-and-pH-Measurement-SOP-4-2022-1.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KBRATIO_001,K:B ratio,KBRATIO,,,,,,,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KBRATIO_002,K:B ratio,KBRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_KMGRATIO_001,K:Mg ratio,KMGRATIO,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_KMGRATIO_001,K:Mg ratio,KMGRATIO,Alcohol Prewash/Ammonium Acetate,,0.055555556,m/v,15 min,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2025-08-12T12:00:00Z,"Invalid, duplicate",
+SOIL,L_MODV2_SOIL_KMGRATIO_001,K:Mg ratio,KMGRATIO,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2025-08-12T12:00:00Z,"Invalid, duplicate",
+SOIL,L_MODV2_SOIL_KMGRATIO_002,K:Mg ratio,KMGRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KMGRATIO_003,K:Mg ratio,KMGRATIO,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KMGRATIO_004,K:Mg ratio,KMGRATIO,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_KMGRATIO_005,K:Mg ratio,KMGRATIO,Alcohol Prewash/Ammonium Acetate,,0.055555556,m/v,15 min,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,USDA,Soil Survey Laboratory Methods Manual #42 ver 4 (2004),,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KNARATIO_001,K:Na ratio,KNARATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_KNARATIO_001,K:Na ratio,KNARATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2025-08-12T12:00:00Z,"Invalid, duplicate",
+SOIL,L_MODV2_SOIL_KNARATIO_002,K:Na ratio,KNARATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_KNARATIO_003,K:Na ratio,KNARATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_001,lead,PB,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_PB_002,lead,PB,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_PB_003,lead,PB,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_PB_004,lead,PB,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_PB_005,lead,PB,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_PB_006,lead,PB,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_007,lead,PB,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_008,lead,PB,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_009,lead,PB,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PB_010,lead,PB,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_011,lead,PB,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_PB_012,lead,PB,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_PB_013,lead,PB,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_014,lead,PB,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PB_015,lead,PB,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LINDEX_001,lime index,LINDEX,Soil Characteristics Regression,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_001,lime recommendation,LREC,Adams-Evans buffer,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_002,lime recommendation,LREC,"Adams-Evans, Modified",,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_003,lime recommendation,LREC,Mehlich buffer,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_004,lime recommendation,LREC,Modified Woodruff buffer,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_005,lime recommendation,LREC,Sikora 1 buffer,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_006,lime recommendation,LREC,Sikora 2 buffer,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_007,lime recommendation,LREC,SMP,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_008,lime recommendation,LREC,Titratable Acidity,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LREC_009,lime recommendation,LREC,Woodruff,,,,,Calculation,MEASURED,tons/ac,ton1ac-1,,,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_LI_001,lithium,LI,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_LI_002,lithium,LI,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MG_001,magnesium,MG,Alcohol Prewash/Ammonium Acetate,,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_002,magnesium,MG,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_003,magnesium,MG,Ammonium Chloride,NH4Cl,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_004,magnesium,MG,Ammonium Chloride,NH4Cl w/ prewash,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_005,magnesium,MG,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,m/v,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_006,magnesium,MG,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_007,magnesium,MG,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_008,magnesium,MG,Slurry,Deionized Water,0.042361111,m/v,,ICP-OES,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_009,magnesium,MG,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_010,magnesium,MG,Slurry,Deionized Water,0.045138889,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_011,magnesium,MG,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MG_012,magnesium,MG,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MG_013,magnesium,MG,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_MG_014,magnesium,MG,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_MG_015,magnesium,MG,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_016,magnesium,MG,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_017,magnesium,MG,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_018,magnesium,MG,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_019,magnesium,MG,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_020,magnesium,MG,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MG_021,magnesium,MG,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MG_022,magnesium,MG,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MG_023,magnesium,MG,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_024,magnesium,MG,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_025,magnesium,MG,Nitric Acid,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_MG_026,magnesium,MG,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_027,magnesium,MG,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_028,magnesium,MG,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MG_029,magnesium,MG,Potassium Chloride,1.0 N KCl,0.048611111,m/v,,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_030,magnesium,MG,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MG_031,magnesium,MG,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MG_032,magnesium,MG,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_033,magnesium,MG,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_034,magnesium,MG,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_035,magnesium,MG,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_036,magnesium,MG,Slurry,Deionized Water,0.045138889,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_037,magnesium,MG,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MG_038,magnesium,MG,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MG_039,magnesium,MG,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_040,magnesium,MG,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_041,magnesium,MG,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_042,magnesium,MG,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_043,magnesium,MG,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_044,magnesium,MG,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_045,magnesium,MG,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_046,magnesium,MG,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_047,magnesium,MG,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_048,magnesium,MG,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_049,magnesium,MG,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_050,magnesium,MG,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_051,magnesium,MG,Potassium Chloride,1.0 N KCl,0.048611111,m/v,,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MG_052,magnesium,MG,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MGINDEX_001,magnesium index,MGINDEX,Mehlich 3,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_001,manganese,MN,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_002,manganese,MN,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MN_003,manganese,MN,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MN_004,manganese,MN,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_005,manganese,MN,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MN_006,manganese,MN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MN_007,manganese,MN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_MN_008,manganese,MN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_MN_009,manganese,MN,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MN_010,manganese,MN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_011,manganese,MN,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_012,manganese,MN,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MN_013,manganese,MN,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MN_014,manganese,MN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MN_015,manganese,MN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MN_016,manganese,MN,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_017,manganese,MN,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_018,manganese,MN,Nitric Acid,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_MN_019,manganese,MN,Phosphoric Acid,Phosphoric Acid (0.033 M H3PO),0.048611111,m/v,10 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, p 9.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MN_020,manganese,MN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_021,manganese,MN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_022,manganese,MN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_023,manganese,MN,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MN_024,manganese,MN,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_MN_025,manganese,MN,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_026,manganese,MN,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_027,manganese,MN,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_028,manganese,MN,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_029,manganese,MN,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MN_030,manganese,MN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MN_031,manganese,MN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_032,manganese,MN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_033,manganese,MN,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_034,manganese,MN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_035,manganese,MN,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_036,manganese,MN,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_037,manganese,MN,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_038,manganese,MN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_039,manganese,MN,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_040,manganese,MN,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_041,manganese,MN,Phosphoric Acid,Phosphoric Acid (0.033 M H3PO),0.048611111,m/v,10 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, p 9.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MN_042,manganese,MN,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MNINDEX_001,manganese index,MNINDEX,Mehlich 3 ICP,,,,,"ICP-OES, AAS",CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_HG_001,mercury,HG,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_HG_002,mercury,HG,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_HG_003,mercury,HG,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_HG_004,mercury,HG,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_HG_005,mercury,HG,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_HG_006,mercury,HG,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MGKRATIO_001,Mg:K ratio,MGKRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MNCURATIO_001,Mn:Cu ratio,MNCURATIO,Mehlich 3 ICP,,,,,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MNCURATIO_002,Mn:Cu ratio,MNCURATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MNZNRATIO_001,Mn:Zn ratio,MNZNRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_MNZNRATIO_001,Mn:Zn ratio,MNZNRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_MNZNRATIO_002,Mn:Zn ratio,MNZNRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MNZNRATIO_003,Mn:Zn ratio,MNZNRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GWC_0_1_BAR_005,moisture content,GWC,0.1 Bar Moisture Tension,Pressure Plate,Saturated paste,m/m,7 days,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH05-Available-Water-Capacity-SOP-4-2022-1-1.pdf,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_GWC_0_33_BAR_003,moisture content,GWC,0.33 Bar Moisture Tension,Pressure Plate,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GWC_001,moisture content,GWC,Oven Drying,"105 C, constant weight",,m/m,16 hrs,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 2A1,  pp 12-13",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Oven Drying alignment — method name standardized; temp/condition detail moved to reagent field.,
+SOIL,L_MODV2_SOIL_GWC_002,moisture content,GWC,Saturated paste moisture,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_GWC_15_BAR_004,moisture content,GWC,15 Bar Moisture Tension,Pressure Plate,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_001,molybdenum,MO,Ammonium Oxalate,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",0.045138889,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_002,molybdenum,MO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.045138889,m/v,4 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)""",
+SOIL,L_MODV2_SOIL_MO_003,molybdenum,MO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_MO_004,molybdenum,MO,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_005,molybdenum,MO,Calcium Chloride,CaCl2 (Hot),,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MO_006,molybdenum,MO,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MO_007,molybdenum,MO,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_MO_008,molybdenum,MO,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_MO_009,molybdenum,MO,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_010,molybdenum,MO,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_011,molybdenum,MO,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_012,molybdenum,MO,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MO_013,molybdenum,MO,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MO_014,molybdenum,MO,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MO_015,molybdenum,MO,Nitric Acid,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_MO_016,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_017,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_018,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS (0.5 M HCl),Saturated paste,in situ probe,60 min acid leaching,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_019,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_020,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MO_021,molybdenum,MO,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_022,molybdenum,MO,Slurry,Deionized Water (Hot),,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_MO_023,molybdenum,MO,Ammonium Oxalate,"Ammonium Oxalate (0.275 M acid ammonium oxalate, 0.1 N sodium hydroxide, 0.03 N ammonium fluoride)",0.045138889,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_024,molybdenum,MO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.045138889,m/v,4 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_025,molybdenum,MO,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_026,molybdenum,MO,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_027,molybdenum,MO,Calcium Chloride,CaCl2 (Hot),,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_028,molybdenum,MO,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MO_029,molybdenum,MO,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_030,molybdenum,MO,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_031,molybdenum,MO,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_032,molybdenum,MO,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_033,molybdenum,MO,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_034,molybdenum,MO,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_035,molybdenum,MO,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MO_036,molybdenum,MO,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NAG_001,N-acetyl-β-D-glucosaminidase (NAG),NAG,Incubation,Assay incubation,0.048611111,v/v,60 min,Spectrophotometric,MEASURED,nmol/h/mg,nmol1hr-1mg-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=44475.wba Page 61,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NI_001,nickel,NI,EPA 3050 Digestion Acid Recoverable,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_NI_002,nickel,NI,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_NI_003,nickel,NI,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_NI_004,nickel,NI,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_NI_005,nickel,NI,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NI_006,nickel,NI,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_NI_007,nickel,NI,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NI_008,nickel,NI,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NI_009,nickel,NI,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3_001,nitrate,NO3,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,Spectrophotometric,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3_002,nitrate,NO3,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,Spectrophotometric,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_001,nitrate-nitrogen,NO3N,Aluminum Sulfate,Aluminum Sulfate/Boric Acid,,,,ISE,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NO3N_002,nitrate-nitrogen,NO3N,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_003,nitrate-nitrogen,NO3N,Calcium Chloride,2.0 M CaCl2,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_004,nitrate-nitrogen,NO3N,Calcium Sulfate,Calcium Sulfate/ Chromotropic Acid,0.045138889,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103. Method S-3.30, pp 41-42",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_005,nitrate-nitrogen,NO3N,Slurry,Deionized Water,0.042361111,,,Cd Red/Spectrophotometric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_006,nitrate-nitrogen,NO3N,EPA 300.0,Deionized water - EPA 300.0,0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_007,nitrate-nitrogen,NO3N,EPA 353.2,,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_008,nitrate-nitrogen,NO3N,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_009,nitrate-nitrogen,NO3N,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_010,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_011,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.00072338,m/v,5 min,ISE,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.2-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NO3N_012,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,"Diffusion Conductivity, Spectrophotometric",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_NO3N_013,nitrate-nitrogen,NO3N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_014,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_015,nitrate-nitrogen,NO3N,Potassium Chloride,0.5 M KCl,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_016,nitrate-nitrogen,NO3N,Potassium Sulfate,0.5 M K2SO4,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_017,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis, Chromotrophic Acid",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_018,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Cd Red/Spectrophotometric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_019,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ISE,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NO3N_020,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_021,nitrate-nitrogen,NO3N,Sodium Bicarbonate,Extraction/Bicarb,0.055555556,,,Cd Red/Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO3N_022,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,MEASURED,mEq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_023,nitrate-nitrogen,NO3N,Aluminum Sulfate,Aluminum Sulfate/Boric Acid,,,,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_024,nitrate-nitrogen,NO3N,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_025,nitrate-nitrogen,NO3N,Calcium Chloride,2.0 M CaCl2,0.045138889,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_026,nitrate-nitrogen,NO3N,Calcium Sulfate,Calcium Sulfate/ Chromotropic Acid,0.045138889,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103. Method S-3.30, pp 41-42",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_027,nitrate-nitrogen,NO3N,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_028,nitrate-nitrogen,NO3N,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_029,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_030,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.00072338,m/v,5 min,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.2-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_031,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,"Diffusion Conductivity, Spectrophotometric",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, WERA-103.  Method S-3.10, pp 39-40",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_032,nitrate-nitrogen,NO3N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_033,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_034,nitrate-nitrogen,NO3N,Potassium Chloride,0.5 M KCl,,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_035,nitrate-nitrogen,NO3N,Potassium Sulfate,0.5 M K2SO4,,,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_036,nitrate-nitrogen,NO3N,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis, Chromotrophic Acid",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO3N_037,nitrate-nitrogen,NO3N,Sodium Bicarbonate,Extraction/Bicarb,0.055555556,,,Cd Red/Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NO2N_001,nitrite-nitrogen,NO2N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NO2N_002,nitrite-nitrogen,NO2N,Potassium Chloride,1.0 M KCl,0.045138889,m/v,30 min,Cd Red/Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 5, pp 5.1-5.3.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NMR_001,nitrogen mineralization rate,NMR,Incubation,Short-term anaerobic incubation with ammonium and nitrate measured colorimetrically pre- and post-incubation,0.048611111,m/v,Varies,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Bundy and Meisinger, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NMR_002,nitrogen mineralization rate,NMR,Incubation,Short-term anaerobic incubation with ammonium and nitrate measured colorimetrically pre- and post-incubation,0.048611111,m/v,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Bundy and Meisinger, 1994",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TKN_001,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte and Analyte code corrected: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte) ",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_002,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_003,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte and Analyte code corrected: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte) ",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_004,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Steam Distillation/Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte and Analyte code corrected: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte) ",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_005,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Invalid, duplicate code",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_006,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte and Analyte code corrected: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte) ",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TKN_007,"nitrogen, total",TKN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte and Analyte code corrected: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte) ",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TN_001,"nitrogen, total",TN,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TN_002,"nitrogen, total",TN,Combustion,Combustion,,,10 min typical,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 2005, Method S-9.30, pp 116-118.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_TN_003,"nitrogen, total",TN,Slurry,Deionized Water,,m/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TN_004,"nitrogen, total",TN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,lb/ac/day,lb1ac-1day-1,,,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Imperial-to-SI conversion; was lb/ac/day,
+SOIL,L_MODV2_SOIL_TN_005,"nitrogen, total",TN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,,,Spectrophotometric,MEASURED,kg/ha/day,kg1ha-1day-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,PROPRIETARY,CANDIDATE,2026-04-03T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TN_006,"nitrogen, total",TN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,CANDIDATE,2026-04-03T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TN_007,"nitrogen, total",TN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,CANDIDATE,2026-04-03T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TN_008,"nitrogen, total",TN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,CANDIDATE,2026-04-03T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TN_009,"nitrogen, total",TN,Kjeldahl,18 M H2SO4,0.048611111,m/v,45-75 minutes,Steam Distillation/Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 31.",,OFFICIAL,CANDIDATE,2026-04-03T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_TIN_001,"nitrogen, total inorganic",TIN,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 33.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_TIN_002,"nitrogen, total inorganic",TIN,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 33.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OC_001,organic carbon,OC,Dry Combustion,O2,,,,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 3rd Edition, 2005, Method S-9.10, pp 111-113.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed: ""Combustion"" → ""Dry Combustion"" | 2026-04-03: Final audit fixes applied",
+SOIL,L_MODV2_SOIL_OC_002,organic carbon,OC,Walkley-Black,Walkley-Black (0.5 M Na2Cr2O7 •2H2O in 5 M H2SO4),0.048611111,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.4-12.5.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OC_003,organic carbon,OC,Walkley-Black,"Dichromate Acid, Titration FeCl3",0.0625,m/v,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OC_004,organic carbon,OC,Walkley-Black,"Walkley-Black (0.167 M K2Cr2O7 + conc. H2SO4), Titration with FeCl3",0.0625,m/v,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.3-12.4.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OC_005,organic carbon,OC,Slurry,Deionized Water,0.048611111,,,Combustion Analyzer,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OC_006,organic carbon,OC,Loss on Ignition (LOI),Loss-on-Ignition - Heat at 360 C for two hours (after temperature reaches 360 C),,,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,"KARLA, Y. P., and D. G.MAYNARD, 1991.  Methods manual for forest soil and plant analysis. For. Can., Northwest Reg., North.For. Cent., Edmonton, Alberta. Canada. L11",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_TOC_001,"organic carbon, total",TOC,Dichromate Acid,Titration with FeCl3,,,,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OM_001,organic matter,OM,Calculation,Organic Matter (Calculated),Calculation,Calculation,Calculation,Calculation,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OM_002,organic matter,OM,Color,Munsel Color Chart,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OM_003,organic matter,OM,Dry Combustion,O2,,,10 min,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 3rd Edition, 2005, Method S-9.10, pp 111-113.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed: ""Combustion"" → ""Dry Combustion"" | 2026-04-03: Final audit fixes applied",
+SOIL,L_MODV2_SOIL_OM_004,organic matter,OM,Loss on Ignition (LOI),Loss-on-Ignition - Heat at 360 C for two hours (after temperature reaches 360 C),,,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_OM_005,organic matter,OM,Walkley-Black,Walkley-Black (0.5 M Na2Cr2O7 •2H2O in 5 M H2SO4),0.048611111,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.4-12.5.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OM_006,organic matter,OM,Walkley-Black,"Walkley-Black (0.167 M K2Cr2O7 + conc. H2SO4), Titration with FeCl3",0.048611111,m/v,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.3-12.4.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OM_007,organic matter,OM,Loss on Ignition (LOI),Loss-on-Ignition - Heat at 550 C for two hours (after temperature reaches 360 C),,,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Cornell,https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/7/9922/files/2022/04/CSH10-Soil-Organic-Matter-Loss-on-Ignition-Total-C-Soil-Organic-Carbon-and-Total-N-SOP-4-2022.pdf,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_ON_001,organic nitrogen,ON,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_OTHER_001,other,OTHER,,,,,,,MEASURED,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PCURATIO_001,P:Cu ratio,PCURATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_PCURATIO_002,P:Cu ratio,PCURATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PMNRATIO_001,P:Mn ratio,PMNRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_PMNRATIO_002,P:Mn ratio,PMNRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PSRATIO_001,P:S ratio,PSRATIO,Mehlich 3 ICP,,,,,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PSRATIO_002,P:S ratio,PSRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PZNRATIO_001,P:Zn ratio,PZNRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Invalid, duplicate code",
+SOIL,L_MODV2_SOIL_PZNRATIO_001,P:Zn ratio,PZNRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2025-08-12T12:00:00Z,"Invalid, duplicate",
+SOIL,L_MODV2_SOIL_PZNRATIO_002,P:Zn ratio,PZNRATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_PZNRATIO_003,P:Zn ratio,PZNRATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2025-08-12T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PARTDENS_001,particle density,PARTDENS,Sodium Hexametaphosphate Solution / Electrical Mixer,"Sodium hexameta phosphate, 5g/L",0.055555556,m/m,120 min,Pycnometer,MEASURED,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_POM_001,particulate organic matter 53-2000 um,POM,Sodium Hexametaphosphate Solution / Reciprocating Shaker,"Sodium hexameta phosphate, 5g/L",0.048611111,m/m,18 hrs,Gravimetric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SSSA,"Cambardella, Cynthia A., and E. T. Elliott. ""Particulate soil organic‐matter changes across a grassland cultivation sequence."" Soil science society of America journal 56.3 (1992): 777-783.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Final audit fixes applied,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_POM_002,particulate organic matter 53-2000 um,POM,Sodium Hexametaphosphate Solution / Reciprocating Shaker,"Sodium hexameta phosphate, 5g/L",0.048611111,m/m,18 hrs,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Cambardella, Cynthia A., and E. T. Elliott. ""Particulate soil organic‐matter changes across a grassland cultivation sequence."" Soil science society of America journal 56.3 (1992): 777-783.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_MNO4OXC_001,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium Permanganate,KMnO4,0.044444444,m/v,2 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AJAC/SSSA,"Am. J. of Alt. Agric. 18: 3–17. doi:10.1079/AJAA2003003, Soil Sci. Soc. Am. J. 76:494–504. doi:10.2136/sssaj2011.0286",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MNO4OXC_002,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium permanganate,Permanganate oxidizable carbon (POXC). Digestion followed by colorimetric measurement,0.048611111,m/v,2 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Weil, et al., 2003",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_MNO4OXC_003,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium Permanganate,KMnO4,0.044444444,m/v,2 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AJAC/SSSA,"Am. J. of Alt. Agric. 18: 3–17. doi:10.1079/AJAA2003003, Soil Sci. Soc. Am. J. 76:494–504. doi:10.2136/sssaj2011.0286",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_MNO4OXC_004,permanganate-oxidizable carbon (POXC),MNO4OXC,Potassium permanganate,Permanganate oxidizable carbon (POXC). Digestion followed by colorimetric measurement,0.048611111,m/v,2 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Weil, et al., 2003",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_001,pH,PH,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,H+ ISE,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PH_002,pH,PH,Calcium Chloride,0.01 M CaCl2,0.042361111,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-2.20",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_003,pH,PH,Calcium Chloride,0.01 M CaCl2,0.043055556,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_004,pH,PH,Calcium Chloride,0.01 M CaCl2,0.043055556,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PH_005,pH,PH,Slurry,Deionized Water,0.042361111,m/v,30 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 4, pp 4.1-4.2.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_006,pH,PH,Slurry,Deionized Water,0.043055556,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-2.22",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_007,pH,PH,Slurry,Deionized Water,0.00072338,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_008,pH,PH,Slurry,Deionized Water,0.045138889,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,,,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_009,pH,PH,Potassium Chloride,1.0 M KCl,0.042361111,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PH_010,pH,PH,Potassium Chloride,1.0 M KCl,0.042361111,m/v,15 min,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 3.2",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_011,pH,PH,Potassium Chloride,0.01 M CaCl2,0.045138889,m/v,"Stir, 30 minute settle",H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PH_012,pH,PH,Potassium Chloride,1.0 N KCl,0.045138889,m/v,"Stir vigorously, settle for 15 minutes",H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PH_013,pH,PH,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,H+ ISE,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PH_014,pH,PH,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,H+ ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PO4_001,phosphate,PO4,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_PO4_002,phosphate,PO4,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PLFA_001,phospholipid fatty acid (PLFA),PLFA,PLFA,"Bligh-Dyer extractant, solid phase extraction, transesterification;",0.048611111,m/v,,Gas chromatograph,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Buyer and Sasser, 2012",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PLFA_002,phospholipid fatty acid (PLFA),PLFA,PLFA,"Bligh-Dyer extractant, solid phase extraction, transesterification;",0.048611111,m/v,,Gas chromatograph,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Buyer and Sasser, 2012",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PMONOEST_001,phosphomonoesterase,PMONOEST,Incubation,Assay incubation,0.048611111,v/v,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Acosta-Martinez and Tabatabai, 2011",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PMONOEST_002,phosphomonoesterase,PMONOEST,Incubation,Assay incubation,0.048611111,v/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Acosta-Martinez and Tabatabai, 2011",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_001,phosphorus,P,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_002,phosphorus,P,Ammonium Lactate,"Ammonium Lactate 0.1 N NH4 lactate + 0.4 N CH3COON, pH 3.7",0.055555556,m/v,4 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_003,phosphorus,P,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_P_004,phosphorus,P,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.048611111,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_005,phosphorus,P,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.046527778,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_006,phosphorus,P,Bray 2,"Bray P2, 0.03 N NH4F + 0.10 N HCl, pH 1.7",0.048611111,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,University of Missouri,"Extractable Soil Phosphorus
+Bray I and Bray II Methods, Chapter 12, 2012.  Soil Testing In Missouri: A Guide for Conducting Soil Tests in Missouri, EC923, University of Missouri.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_007,phosphorus,P,Bray 2,,0.046527778,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_008,phosphorus,P,Bray-Kurtz,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_009,phosphorus,P,Calcium Acetate Lactate (CAL),"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
+acid, brought to 1 liter with DI water",0.055555556,m/v,90 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_010,phosphorus,P,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Commun. Soil Sci. Plant Anal. 1990, 21, 2281–2290.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_011,phosphorus,P,Calculation,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_012,phosphorus,P,Carbon Dioxide,Saturated CO2 Method,0.055555556,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_013,phosphorus,P,Colwell,"Colwell (Bicarbonate) 0.5 M NaCO3, pH 8.5",0.111111111,m/v,16 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_014,phosphorus,P,Slurry,Deionized Water,0.042361111,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_015,phosphorus,P,Slurry,Deionized Water,0.045138889,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_016,phosphorus,P,Slurry,Deionized Water,0.048611111,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_017,phosphorus,P,Slurry,Deionized Water,0.055555556,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_018,phosphorus,P,Diffuse Gradient Thin Films,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_019,phosphorus,P,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_P_020,phosphorus,P,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_021,phosphorus,P,Ion Exchange Resin,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_022,phosphorus,P,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_023,phosphorus,P,Kelowna,"Kelowna, 0.25 N HOAc + 0.015 N NH4F",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_024,phosphorus,P,Kelowna,"Modified Kelowna-95, 0.5 N HOAc + 0.015 N NH4F + 1 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_025,phosphorus,P,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_026,phosphorus,P,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_027,phosphorus,P,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_028,phosphorus,P,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_029,phosphorus,P,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_030,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_031,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,Spectrophotometric,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_032,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_033,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_034,phosphorus,P,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_P_035,phosphorus,P,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_036,phosphorus,P,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_037,phosphorus,P,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_038,phosphorus,P,Nitric Acid,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_P_039,phosphorus,P,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_040,phosphorus,P,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_041,phosphorus,P,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_042,phosphorus,P,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_043,phosphorus,P,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_044,phosphorus,P,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_045,phosphorus,P,Sodium Bicarbonate,"Bicarbonate, 0.5 M NaHCO3, pH 8.5",0.055555556,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_046,phosphorus,P,Sulfuric Acid,0.005 M H2SO4,0.048611111,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_P_047,phosphorus,P,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_048,phosphorus,P,"Truog, Modified","Modified Truog, 0.001 N H2S04 buffered with 3% NH4HS04, pH 3.0",0.111111111,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_P_049,phosphorus,P,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_050,phosphorus,P,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_051,phosphorus,P,Ammonium Lactate,"Ammonium Lactate 0.1 N NH4 lactate + 0.4 N CH3COON, pH 3.7",0.055555556,m/v,4 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_052,phosphorus,P,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_053,phosphorus,P,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.048611111,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_054,phosphorus,P,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.046527778,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_055,phosphorus,P,Bray 2,"Bray P2, 0.03 N NH4F + 0.10 N HCl, pH 1.7",0.048611111,m/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,University of Missouri,"Extractable Soil Phosphorus
+Bray I and Bray II Methods, Chapter 12, 2012.  Soil Testing In Missouri: A Guide for Conducting Soil Tests in Missouri, EC923, University of Missouri.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_056,phosphorus,P,Calcium Acetate Lactate (CAL),"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
+acid, brought to 1 liter with DI water",0.055555556,m/v,90 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_057,phosphorus,P,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Commun. Soil Sci. Plant Anal. 1990, 21, 2281–2290.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_058,phosphorus,P,Calculation,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_059,phosphorus,P,Carbon Dioxide,Saturated CO2 Method,0.055555556,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_060,phosphorus,P,Colwell,"Colwell (Bicarbonate) 0.5 M NaCO3, pH 8.5",0.111111111,m/v,16 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_061,phosphorus,P,Slurry,Deionized Water,0.042361111,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_062,phosphorus,P,Slurry,Deionized Water,0.045138889,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_063,phosphorus,P,Slurry,Deionized Water,0.048611111,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_064,phosphorus,P,Slurry,Deionized Water,0.055555556,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_065,phosphorus,P,Diffuse Gradient Thin Films,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_066,phosphorus,P,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_P_067,phosphorus,P,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_068,phosphorus,P,Ion Exchange Resin,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_069,phosphorus,P,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_070,phosphorus,P,Kelowna,"Kelowna, 0.25 N HOAc + 0.015 N NH4F",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_071,phosphorus,P,Kelowna,"Modified Kelowna-95, 0.5 N HOAc + 0.015 N NH4F + 1 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_072,phosphorus,P,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_073,phosphorus,P,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_074,phosphorus,P,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_075,phosphorus,P,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_076,phosphorus,P,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_077,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_078,phosphorus,P,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_079,phosphorus,P,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_080,phosphorus,P,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_081,phosphorus,P,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_082,phosphorus,P,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_083,phosphorus,P,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_084,phosphorus,P,Sodium Bicarbonate,"Bicarbonate, 0.5 M NaHCO3, pH 8.5",0.055555556,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_085,phosphorus,P,Sulfuric Acid,0.005 M H2SO4,0.048611111,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_086,phosphorus,P,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_P_087,phosphorus,P,"Truog, Modified","Modified Truog, 0.001 N H2S04 buffered with 3% NH4HS04, pH 3.0",0.111111111,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PBUFINDEX_001,phosphorus buffer index,PBUFINDEX,Calculation,Phosphorus Equilibration,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_PBUFINDEX_002,phosphorus buffer index,PBUFINDEX,Calculation,Bicarbonate (Olsen),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PBUFINDEX_003,phosphorus buffer index,PBUFINDEX,Calculation,Bicarbonate (Colwell),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PBUFINDEX_004,phosphorus buffer index,PBUFINDEX,Calculation,CaCl2/PO4,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PBUFINDEX_005,phosphorus buffer index,PBUFINDEX,Calculation,Phosphorus Equilibration,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PBUFINDEX_006,phosphorus buffer index,PBUFINDEX,Calculation,Bicarbonate (Olsen),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PBUFINDEX_007,phosphorus buffer index,PBUFINDEX,Calculation,Bicarbonate (Colwell),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PBUFINDEX_008,phosphorus buffer index,PBUFINDEX,Calculation,CaCl2/PO4,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PERINDEX_001,phosphorus environmental risk index,PERINDEX,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PERINDEX_002,phosphorus environmental risk index,PERINDEX,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PFF_001,phosphorus fixation factor,PFF,Mehlich 3,Mehlich 3 (calculated Phosphorus Fixation Factor),Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PFF_002,phosphorus fixation factor,PFF,Mehlich 3,Mehlich 3 (calculated Phosphorus Fixation Factor),Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PINDEX_001,phosphorus index,PINDEX,Calculation,Ratio of P to Ca and Fe,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PINDEX_002,phosphorus index,PINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PINDEX_003,phosphorus index,PINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PINDEX_004,phosphorus index,PINDEX,Calculation,Ratio of P to Ca and Fe,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PINDEX_005,phosphorus index,PINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PINDEX_006,phosphorus index,PINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PINDEX_007,phosphorus index,PINDEX,Calculation,Ratio of P to Ca and Fe,Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PINDEX_008,phosphorus index,PINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Index),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PRATIO_001,phosphorus ratio,PRATIO,Mehlich 3 ICP,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PRI_001,phosphorus retention index,PRI,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_PRI_002,phosphorus retention index,PRI,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PSINDEX_001,phosphorus saturation index,PSINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Saturation Index),Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_PSINDEX_002,phosphorus saturation index,PSINDEX,Mehlich 3,Mehlich 3 - Standard Oligos,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_PSINDEX_003,phosphorus saturation index,PSINDEX,Mehlich 3,Mehlich 3 (calculated Phosphorus Saturation Index),Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_PSINDEX_004,phosphorus saturation index,PSINDEX,Mehlich 3,Mehlich 3 - Standard Oligos,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TP_001,"phosphorus, total",TP,Kjeldahl,18 M H2SO4,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_TP_002,"phosphorus, total",TP,Nitric Acid,HNO3,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric Acid"" → ""HNO3""",
+SOIL,L_MODV2_SOIL_TP_003,"phosphorus, total",TP,Kjeldahl,18 M H2SO4,,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TP_004,"phosphorus, total",TP,Nitric Acid,HNO3,,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_001,potassium,K,Alcohol Prewash/Ammonium Acetate,,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_002,potassium,K,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_003,potassium,K,Ammonium Lactate,"Ammonium Lactate 0.1 N NH4 lactate + 0.4 N CH3COON, pH 3.7",0.055555556,m/v,4 hrs,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_004,potassium,K,Ammonium Chloride,NH4Cl,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_005,potassium,K,Ammonium Chloride,NH4Cl w/ prewash,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_006,potassium,K,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_007,potassium,K,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_008,potassium,K,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.046527778,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_009,potassium,K,Bray 2,"Bray P2, 0.03 N NH4F + 0.10 N HCl, pH 1.7",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_010,potassium,K,Calcium Acetate Lactate (CAL),"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
+acid, brought to 1 liter with DI water",0.055555556,m/v,90 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_K_011,potassium,K,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_012,potassium,K,Calculation,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_013,potassium,K,Carbon Dioxide,Saturated CO2 Method,0.055555556,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_K_014,potassium,K,Colwell,"Colwell (Bicarbonate) 0.5 M NaCO3, pH 8.5",0.111111111,m/v,16 hrs,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_015,potassium,K,Slurry,Potassium Water 1:5,0.045138889,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_016,potassium,K,Slurry,Deionized Water,0.042361111,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_017,potassium,K,Slurry,Deionized Water,0.055555556,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_018,potassium,K,Diffuse Gradient Thin Films,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_019,potassium,K,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_020,potassium,K,Hydrochloric Acid,HCl (Skeen),,,,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_021,potassium,K,Hydrochloric Acid,HCl (Skeen),,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_022,potassium,K,Ion Exchange Resin,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_023,potassium,K,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_024,potassium,K,Kelowna,"Kelowna, 0.25 N HOAc + 0.015 N NH4F",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_025,potassium,K,"Kelowna 2, Modified","Modified Kelowna 2, 0.25 N HOAc + 0.015 N NH4F + 0.25 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_026,potassium,K,"Kelowna-95, Modified","Modified Kelowna-95, 0.5 N HOAc + 0.015 N NH4F + 1 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_027,potassium,K,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_028,potassium,K,M3 - Field-moist K,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_029,potassium,K,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_K_030,potassium,K,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_031,potassium,K,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_032,potassium,K,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_033,potassium,K,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_K_034,potassium,K,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_035,potassium,K,Nitric Acid,HNO3,,,,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_036,potassium,K,Nitric Acid,HNO3 (Hot),,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_037,potassium,K,Nitric Acid,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",Saturated paste,Saturated Paste,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,https://academic.oup.com/jaoac/article-abstract/68/4/766/5704621?redirectedFrom=fulltext,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Analyte Measurement Method clarified: ICP → ICP-OES; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_K_038,potassium,K,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_039,potassium,K,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_040,potassium,K,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_041,potassium,K,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_042,potassium,K,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_K_043,potassium,K,Sodium Bicarbonate,"Bicarbonate, 0.5 M NaHCO3, pH 8.5",0.055555556,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_044,potassium,K,Sulfuric Acid,0.005 M H2SO4,0.048611111,m/v,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_K_045,potassium,K,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_046,potassium,K,"Truog, Modified","Modified Truog, 0.001 N H2S04 buffered with 3% NH4HS04, pH 3.0",0.111111111,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_047,potassium,K,Slurry,Deionized Water,0.209027778,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_K_048,potassium,K,,,,,,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_049,potassium,K,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_K_050,potassium,K,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_K_051,potassium,K,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_052,potassium,K,Ammonium Lactate,"Ammonium Lactate 0.1 N NH4 lactate + 0.4 N CH3COON, pH 3.7",0.055555556,m/v,4 hrs,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"SIS (Standardizing Commission in Sweden). 1993. Soil Analysis - Extraction and Determination of Phosphorus, Potassium, Calcium, Magnesium and Sodium from Soils with Ammonium Lactate/acetic Acid Solution (the AL‐method) SS 028310 Stockholm, Sweden",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_053,potassium,K,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 12, pp 12.5-12.6.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_054,potassium,K,Bray 1,"Bray P1, 0.03 N NH4F + 0.025 N HCl, pH 2.7",0.046527778,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_055,potassium,K,Bray 2,"Bray P2, 0.03 N NH4F + 0.10 N HCl, pH 1.7",0.048611111,m/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_056,potassium,K,Calcium Acetate Lactate (CAL),"Calcium Acetate Lactate (CAL) solution:  15.4 g calcium lactate, 15.4 g calcium acetate, 17.9 ml acetic acid
+acid, brought to 1 liter with DI water",0.055555556,m/v,90 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Dipl.-Ing. H. Schüller, 1969.  The CAL method, a new method for determining the plant-available phosphate in soil.  Journal of Plant Nutrition and Soil Science.  Volume 123, Issue 1, pages 48-63.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_057,potassium,K,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J. Applicability of 0.01 M CaCl2 as a single extraction solution for",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_058,potassium,K,Calculation,Mehlich 3 to Bray P1 (1:10) Regressed,Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_059,potassium,K,Carbon Dioxide,Saturated CO2 Method,0.055555556,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_060,potassium,K,Colwell,"Colwell (Bicarbonate) 0.5 M NaCO3, pH 8.5",0.111111111,m/v,16 hrs,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 9B1,  pp 162.164",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_061,potassium,K,Slurry,Potassium Water 1:5,0.045138889,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_062,potassium,K,Slurry,Deionized Water,0.042361111,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_063,potassium,K,Slurry,Deionized Water,0.055555556,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_064,potassium,K,Diffuse Gradient Thin Films,Diffuse Gradient Thin Films,Equilibration,,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Mason S, McNeill A, McLaughlin MJ and Zhang H (2010) Prediction of wheat response to an application of phosphorus under field conditions using diffusive gradients in thin-films (DGT) and extraction methods. Plant and Soil 337: 243–258.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_065,potassium,K,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_066,potassium,K,Ion Exchange Resin,Resin - NH4Cl 0.8 mol / L in 0.2 mol / L HCl,Saturated paste,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_067,potassium,K,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_068,potassium,K,Kelowna,"Kelowna, 0.25 N HOAc + 0.015 N NH4F",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AAFC,"Determination of available phosphorus in acid and calcareous soils with the Kelowna multi-element extractant.  Soil Sci. Vol 146, No. 4, 284-291.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_069,potassium,K,"Kelowna 2, Modified","Modified Kelowna 2, 0.25 N HOAc + 0.015 N NH4F + 0.25 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_070,potassium,K,"Kelowna-95, Modified","Modified Kelowna-95, 0.5 N HOAc + 0.015 N NH4F + 1 N NH4Oac",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AAFC,"Simultaneous extraction of available phosphorus and potassium with a new soil test: A modification of Kelowna extraction.  Communications in Soil Science and Plant Analysis, Volume 25, 1994, pp 627-635.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_071,potassium,K,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_072,potassium,K,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_073,potassium,K,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_074,potassium,K,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_075,potassium,K,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_076,potassium,K,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_077,potassium,K,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_078,potassium,K,Sodium Bicarbonate,"Bicarbonate, 0.5 M NaHCO3, pH 8.5",0.055555556,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-4.10",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_079,potassium,K,Sulfuric Acid,0.005 M H2SO4,0.048611111,m/v,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_080,potassium,K,Truog,"Truog, 0.002 N H2S04 buffered with NH4HS04, pH 3.0",0.180555556,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_081,potassium,K,"Truog, Modified","Modified Truog, 0.001 N H2S04 buffered with 3% NH4HS04, pH 3.0",0.111111111,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_082,potassium,K,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_K_083,potassium,K,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_KFF_001,potassium fixation factor,KFF,Mehlich 3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KFF_002,potassium fixation factor,KFF,Mehlich 3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KFF_003,potassium fixation factor,KFF,Mehlich 3,Mehlich 3 (calculated Potassium Fixation Factor),Calculation,Calculation,Calculation,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KINDEX_001,potassium index,KINDEX,Mehlich 3,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_KINDEX_002,potassium index,KINDEX,Mehlich 3 ICP,,,,,"ICP-OES, AAS",CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,#REF!,potassium index,KINDEX,Mehlich 3,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,,,
+SOIL,#REF!,potassium index,KINDEX,Mehlich 3 ICP,,,,,"ICP-OES, AAS",CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_TK_001,"potassium, total",TK,Kjeldahl,18 M H2SO4,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_TK_002,"potassium, total",TK,Kjeldahl,18 M H2SO4,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_TK_003,"potassium, total",TK,Nitric Acid,HNO3,,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric Acid"" → ""HNO3""",
+SOIL,L_MODV2_SOIL_TK_004,"potassium, total",TK,Kjeldahl,18 M H2SO4,,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TK_005,"potassium, total",TK,Kjeldahl,18 M H2SO4,,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TK_006,"potassium, total",TK,Nitric Acid,HNO3,,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_POTOXC_001,potential oxidizable carbon,POTOXC,"Permanganate, Oxidizable Carbon",,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_POTMN_001,potentially mineralizable nitrogen (PMN),POTMN,Permanganate Mineralizable Nitrogen,,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,INVALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_POTMN_001,potentially mineralizable nitrogen (PMN),POTMN,Potassium Chloride,2.0 M KCl,0.142361111,m/v,16 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 7d, pp 134-140",,OFFICIAL,INVALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_POTMN_002,potentially mineralizable nitrogen (PMN),POTMN,Permanganate Mineralizable Nitrogen,,,,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_POTMN_003,potentially mineralizable nitrogen (PMN),POTMN,Potassium Chloride,2.0 M KCl,0.142361111,m/v,16 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 7d, pp 134-140",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_POTMN_004,potentially mineralizable nitrogen (PMN),POTMN,Potassium Chloride,2.0 M KCl,0.142361111,m/v,16 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASPAC,"Rayment, G. and J. Lyons. 2011. Soil Chemical Methods - Australasia, CSIRO, Method 7d, pp 134-140",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_XSL_001,reactive soil carbonates,XSL,Excess lime,1.0 N HCl,,,,Observation,OBSERVED,Description,description,,,USDA,"Soil Science Division Staff. 2017. Soil survey manual. C. Ditzler, K. Scheffe, and H.C. Monger (eds.). USDA Handbook 18. Government Printing Office, Washington, D.C., pg. 199-200.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_SREF_001,reflectance,SREF,Reflectance,Diffuse reflectance spectroscopy,0.048611111,m/v,,Reflectance,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,Soil Health Institute,"Veum, et al., 2015",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_RZM_001,rootzone moisture,RZM,"Drying, Depth & Bulk Density",,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SAND_001,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 2.0 to  > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SAND_002,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Laser Diffraction,0.055555556,m/m,5 min,Diffraction,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 2.0 to  > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SAND_003,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sedimentation / Hydrometer,0.055555556,m/m,5 min,Hydrometer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 2.0 to  > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SAND_004,sand,SAND,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,5 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 2.0 to  > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDC_001,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 1.0 to > 0.5 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDC_002,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 1.0 to > 0.5 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDC_003,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 1.0 to > 0.5 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDC_004,sand - coarse,SANDC,Sodium Hexametaphosphate Solution / Electrical Mixer,"Dispersion / Sieve / Weigh, 500 - 1000 um",0.055555556,m/m,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Uified > 2.0 to < 4.8 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDF_001,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 0.25 to > 0.10 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDF_002,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 0.25 to > 0.10 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDF_003,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA 0.25 to > 0.10 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDF_004,sand - fine,SANDF,Sodium Hexametaphosphate Solution / Electrical Mixer,"Dispersion / Sieve / Weigh, 150 - 250 um",0.055555556,m/m,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Unified > 0.074 to < 0.42 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDM_001,sand - medium,SANDM,Sodium Hexametaphosphate Solution / Electrical Mixer,"Dispersion / Sieve / Weigh, 250 - 500 um",0.055555556,m/m,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Unified > 0.42 ro < 2.0 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDVC_001,sand - very coarse,SANDVC,Sodium Hexametaphosphate Solution / Electrical Mixer,"Dispersion / Sieve / Weigh, 1000 - 2000 um",0.055555556,m/m,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SANDVF_001,sand - very fine,SANDVF,Sodium Hexametaphosphate Solution / Electrical Mixer,"Dispersion / Sieve / Weigh, 50 - 150 um",0.055555556,m/m,120 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ASTM,ASTM D-2487 Classification of Soils for Engineering Purposes (United Soil Classification System),,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SHC_001,saturated hydraulic conductivity,SHC,Head Method,Two-ponding head method in field with Saturo™,Saturation,Saturation,Varies,Volume,MEASURED,cm/hr,cm1hr-1,CentiM-PER-HR,http://qudt.org/vocab/unit/CentiM-PER-HR,Soil Health Institute,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 3.4.3.  Field Methods (Vadose and Saturated Zone Techniques), pages 817-843./ Saturo™ (https://www.metergroup.com/en/meter-environment/products/saturo-infiltrometer-field-saturated-hydraulic-conductivity)",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SATPP_001,saturation paste %,SATPP,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SE_001,selenium,SE,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Aqua Regia (3:1 mixture of hydrochloric "" → ""Aqua Regia (HCl:HNO3, 3:1)"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+SOIL,L_MODV2_SOIL_SE_002,selenium,SE,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SE_003,selenium,SE,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SE_004,selenium,SE,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, ICP-MS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_SE_005,selenium,SE,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_SE_006,selenium,SE,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_SE_007,selenium,SE,Aqua Regia,"Aqua Regia (HCl:HNO3, 3:1)",0.048611111,m/v,20 min,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,ISO,ISO standard 11466 or EPA 3051A,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SE_008,selenium,SE,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SE_009,selenium,SE,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SE_010,selenium,SE,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, ICP-MS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WERA-103,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SE_011,selenium,SE,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SE_012,selenium,SE,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_STCM_001,short-term carbon mineralization,STCM,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_STCM_002,short-term carbon mineralization,STCM,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_STCM_003,short-term carbon mineralization,STCM,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_STCM_004,short-term carbon mineralization,STCM,Incubation,1-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,24 hrs,CO2 Paddle,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Woods End Laboratories,Solvita Gel System; https://solvita.com/co2-burst/,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_STCM_005,short-term carbon mineralization,STCM,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_STCM_006,short-term carbon mineralization,STCM,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_STCM_007,short-term carbon mineralization,STCM,Incubation,3-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,3 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_STCM_008,short-term carbon mineralization,STCM,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_STCM_009,short-term carbon mineralization,STCM,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_STCM_010,short-term carbon mineralization,STCM,Incubation,4-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,4 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_STCM_011,short-term carbon mineralization,STCM,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_STCM_012,short-term carbon mineralization,STCM,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Infrared gas analyzer (IRGA),MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_STCM_013,short-term carbon mineralization,STCM,Incubation,7-day incubation followed by CO2-C evolution and capture at 50% water-filled pore space.,50% water-filled pore space,m/v,7 days,Titration,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,Soil Health Institute,"Zibilske, 1994",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_SI_001,silicon,SI,Acetic Acid,0.5 M Acetic Acid,0.00072338,m/v,"Stand for 20 hr, shake for 50 min",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 12.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SI_002,silicon,SI,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SI_003,silicon,SI,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SI_004,silicon,SI,Potassium Chloride,1.0 N KCl,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_SI_005,silicon,SI,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SI_006,silicon,SI,Sulfuric Acid,0.005 M H2SO4,,m/v,,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SI_007,silicon,SI,Acetic Acid,0.5 M Acetic Acid,0.00072338,m/v,"Stand for 20 hr, shake for 50 min",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 12.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SI_008,silicon,SI,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SI_009,silicon,SI,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SI_010,silicon,SI,Sulfuric Acid,0.005 M H2SO4,,m/v,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SILT_001,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sieve / Weigh,0.055555556,m/m,,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 265-269.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA .02 to > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SILT_002,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Laser Diffraction,0.055555556,m/m,5 min,Diffraction,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 286-288.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA .02 to > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SILT_003,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sedimentation / Hydrometer,0.055555556,m/m,5 min,Hydrometer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 278-283.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA .02 to > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SILT_004,silt,SILT,Sodium Hexametaphosphate Solution / Electrical Mixer,Dispersion / Sedimentation / Pipette / Weigh,0.055555556,m/m,5 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 4 Physical Methods, 5.4.  Gee and Or, 2002.  Chapter 2.4. Particle-Size Analysis, pages 272-278.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA .02 to > 0.05 mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SILTCLAY_001,silt+clay,SILTCLAY,Calculation,Calculation,0.055555556,Calculation,Calculation,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Final audit fixes applied,USDA < 0.05mm; Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AG_001,silver,AG,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_AG_002,silver,AG,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SLAKING_001,slaking,SLAKING,Slurry,,,,120 min,Observation,MEASURED,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_001,sodium,NA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_NA_002,sodium,NA,Ammonium Chloride,NH4Cl,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_003,sodium,NA,Ammonium Chloride,NH4Cl w/ prewash,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_004,sodium,NA,Ammonium Chloride/Barium Chloride,NH4Cl/BaCl2,,,,ICP-OES,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_005,sodium,NA,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NA_006,sodium,NA,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_NA_007,sodium,NA,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_NA_008,sodium,NA,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_NA_009,sodium,NA,H3A-1,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_NA_010,sodium,NA,Lancaster Extraction,,,,,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,,,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_NA_011,sodium,NA,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_NA_012,sodium,NA,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_013,sodium,NA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_014,sodium,NA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_015,sodium,NA,Nitric Acid,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_NA_016,sodium,NA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_NA_017,sodium,NA,Potassium Chloride,1.0 N KCl,,,,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_018,sodium,NA,Resin Extraction - Unibest,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_NA_019,sodium,NA,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_NA_020,sodium,NA,Slurry,Deionized Water,0.042361111,,,ICP-OES,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_021,sodium,NA,Slurry,Deionized Water,0.834027778,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_022,sodium,NA,Slurry,Deionized Water,0.209027778,,,Ion Chromatography,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_023,sodium,NA,Slurry,Deionized Water,0.209027778,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_NA_024,sodium,NA,,,,,,Calculation,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_025,sodium,NA,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_026,sodium,NA,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_027,sodium,NA,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_NA_028,sodium,NA,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_029,sodium,NA,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_030,sodium,NA,H3A-1,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_031,sodium,NA,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_032,sodium,NA,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_033,sodium,NA,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_034,sodium,NA,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NA_035,sodium,NA,Resin Extraction - Unibest,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SAR_001,sodium adsorption ratio,SAR,Ammonium Acetate,Ammonium Acetate,Calculation,Calculation,Calculation,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_SAR_002,sodium adsorption ratio,SAR,Slurry,Deionized Water,0.045138889,m/m,,"ICP-OES, AAS",CALCULATION,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_SAR_003,sodium adsorption ratio,SAR,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,"USDA, WERA-103","US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SOLIDS_001,"solids, total",SOLIDS,,,,,,Calculation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SS_001,soluble salts,SS,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Electrical Conductivity,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SS_002,soluble salts,SS,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Electrical Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SSINDEX_001,soluble salts index,SSINDEX,,,,,,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SR_001,strontium,SR,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SR_002,strontium,SR,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_SR_003,strontium,SR,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SR_004,strontium,SR,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_001,sulfate-sulfur,SO4S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,Turbidimetric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SO4S_002,sulfate-sulfur,SO4S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,Turbidimetric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SO4S_003,sulfate-sulfur,SO4S,Slurry,Deionized Water,0.042361111,m/v,,XRF-IMP,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_SO4S_004,sulfate-sulfur,SO4S,Slurry,Deionized Water,0.042361111,m/v,,Turbidimetric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_005,sulfate-sulfur,SO4S,EPA 300.0,Deionized water - EPA 300.0,0.048611111,m/v,10 min,Ion Chromatography,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,US-EPA,"EPA 300.0  Determination of Inorganic Anions by Ion Chromatography, Revision 2.1, August 1993.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_006,sulfate-sulfur,SO4S,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Ion Chromatography,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_007,sulfate-sulfur,SO4S,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Turbidimetric,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_008,sulfate-sulfur,SO4S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,Turbidimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_009,sulfate-sulfur,SO4S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,Turbidimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SO4S_010,sulfate-sulfur,SO4S,Slurry,Deionized Water,0.042361111,m/v,,XRF-IMP,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_001,sulfur,S,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_002,sulfur,S,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_003,sulfur,S,Ammonium Acetate,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_004,sulfur,S,Calcium Chloride,Calcium Chloride,,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_005,sulfur,S,Calcium Chloride,Calcium Chloride,,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Shirisha, K., K.L. Sahrawat, K.V.S. Murthy, S.P. Wani, P.N. Gajbhiye, and S. Kundu. 2010. Comparative evaluation of ICP-AES and turbidimetric methods for determining extractable sulfur in soils. Jour. Indian Soc. Soil Sci. 58:323-326.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_006,sulfur,S,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_007,sulfur,S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_008,sulfur,S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_009,sulfur,S,Oxygen Combustion,O2,,,,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed for S analyte: ""Combustion"" → ""Oxygen Combustion"" | 2026-04-03: Final audit fixes applied",
+SOIL,L_MODV2_SOIL_S_010,sulfur,S,Slurry,Deionized Water,0.045138889,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_011,sulfur,S,Slurry,Deionized Water,0.042361111,m/v,,ICP-OES,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_012,sulfur,S,Slurry,Deionized Water,0.042361111,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_013,sulfur,S,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_014,sulfur,S,Slurry,Deionized Water,0.045138889,m/v,,XRF-IMP,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_015,sulfur,S,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_S_016,sulfur,S,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050 Digestion (Nitric Acid, Hydroge"" → ""EPA 3050 Digestion (HNO3, H2O2), EPA 601"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_S_017,sulfur,S,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_S_018,sulfur,S,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_S_019,sulfur,S,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_S_020,sulfur,S,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_021,sulfur,S,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_022,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_023,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_024,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_025,sulfur,S,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_026,sulfur,S,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_S_027,sulfur,S,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_S_028,sulfur,S,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_029,sulfur,S,Modified Morgan,Modified Morgan,0.044444444,v/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_030,sulfur,S,Nitric Acid,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_S_031,sulfur,S,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_032,sulfur,S,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_033,sulfur,S,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_034,sulfur,S,Potassium Chloride,0.25 M KCl at 40 C,,m/v,,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,,"Blair, Graeme J., et al. ""Sulfur soil testing."" Plant and soil 155.1 (1993): 383-386.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_S_035,sulfur,S,Potassium Chloride,1.0 N KCl,,m/v,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_S_036,sulfur,S,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,ICP-OES,MEASURED,meq/L,meq1l-1,Needs QUDT Discussion,Needs QUDT Discussion,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_037,sulfur,S,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_038,sulfur,S,Ammonium Acetate,"1.0 N Ammonium Acetate, pH 7.0",0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,"North Central Regional Research Publication No. 221 (Revised 2015), Chapter 7, pp 7.1-7.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_039,sulfur,S,Ammonium Acetate,,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_040,sulfur,S,Calcium Chloride,Calcium Chloride,,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_041,sulfur,S,Calcium Chloride,Calcium Chloride,,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Shirisha, K., K.L. Sahrawat, K.V.S. Murthy, S.P. Wani, P.N. Gajbhiye, and S. Kundu. 2010. Comparative evaluation of ICP-AES and turbidimetric methods for determining extractable sulfur in soils. Jour. Indian Soc. Soil Sci. 58:323-326.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_042,sulfur,S,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_043,sulfur,S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_044,sulfur,S,Calcium Phosphate,Calcium Phosphate,0.00072338,m/v,30 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCERA-13,https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/specialb/sb1001.pdf,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_045,sulfur,S,Slurry,Deionized Water,0.045138889,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_046,sulfur,S,Slurry,Deionized Water,0.042361111,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_047,sulfur,S,Slurry,Deionized Water,0.055555556,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_048,sulfur,S,Slurry,Deionized Water,0.045138889,m/v,,XRF-IMP,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_049,sulfur,S,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_050,sulfur,S,EPA 3050,"EPA 3050 Digestion (HNO3, H2O2), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_S_051,sulfur,S,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_S_052,sulfur,S,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_053,sulfur,S,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_054,sulfur,S,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_055,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,m/v,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_056,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_057,sulfur,S,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,variable,24 hrs,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_058,sulfur,S,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"SERA-6, NCERA-13, NECC-1812","Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_059,sulfur,S,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_060,sulfur,S,Modified Morgan,Modified Morgan,0.044444444,v/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_S_061,sulfur,S,Potassium Chloride,1.0 N KCl,,m/v,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SINDEX_001,sulfur index,SINDEX,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,CALCULATION,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TEXTURE_001,textural classification,TEXTURE,Calculation,Calculation,Calculation,Calculation,Calculation,Gravimetric,CALCULATION,Description,description,,,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TEXTURE_002,textural classification,TEXTURE,Calculation,Calculation,Calculation,Calculation,Calculation,Modeled on micro-pipette PSA,MEASURED,,description,,,,,,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TEXTURE_003,textural classification,TEXTURE,Calculation,Calculation,Calculation,Calculation,Calculation,Calculation,MEASURED,Description,description,,,USDA,"USDA, U.S. Department of Agriculture (Soil Survey Staff, 1975);",,OFFICIAL,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SN_001,tin,SN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SN_002,tin,SN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_SN_003,tin,SN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_SN_004,tin,SN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_SN_005,tin,SN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_SN_006,tin,SN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TITACIDT_001,titratable acidity,TITACIDT,,,,,,Titration,MEASURED,mEq/100g,mEq1hg-1,MilliEQ-PER-HectoGM,http://qudt.org/vocab/unit/MilliEQ-PER-HectoGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TCTN_001,total carbon:total nitrogen,TCTN,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_TOCTN_001,total organic carbon: total nitrogen,TOCTN,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_UNKNOWN_001,unknown,UNKNOWN,,,,,,,MEASURED,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_UREA_001,urea,UREA,Diacetyl Monoxime,"2 M KCl, phenylmercuric acetate (PMA)",0.048611111,,60 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 34.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Final audit fixes applied,
+SOIL,L_MODV2_SOIL_UREA_002,urea,UREA,Diacetyl Monoxime,"2 M KCl, phenylmercuric acetate (PMA)",0.048611111,,60 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SSSA,"Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, 9.2.2, Second Edition, Chapter 34.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_WEN_001,water extractable nitrogen (WEN),WEN,Water / Reciprocating Shaker / Centrifuge,Deionized Water,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_WEN_002,water extractable nitrogen (WEN),WEN,Water / Reciprocating Shaker / Centrifuge,Deionized Water,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_WEOC_001,water extractable organic carbon (WEOC),WEOC,Slurry,Deionized Water,0.048611111,m/v,10 min,TOC Analyzer,MEASURED,g,g,GM,http://qudt.org/vocab/unit/GM,,"Cookson, W. R., Murphy, D. V., and Roper, M. M. (2008). Characterizing the relationships between soil organic matter components and microbial function and composition along a tillage disturbance gradient. Soil Biol. Biochem. 40, 763–777. doi: 10.1016/j.soilbio.2007.10.011",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_TDN_001,water extractable organic nitrogen (WEON),TDN,Slurry,Deionized Water,0.048611111,m/v,10 min,TN Analyzer,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Cookson, W. R., Murphy, D. V., and Roper, M. M. (2008). Characterizing the relationships between soil organic matter components and microbial function and composition along a tillage disturbance gradient. Soil Biol. Biochem. 40, 763–777. doi: 10.1016/j.soilbio.2007.10.011",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass. | 2026-04-03: Fixed broken #REF! formula; v2Code set to L_MODV2_SOIL_TDN_001,
+SOIL,L_MODV2_SOIL_WEON_001,water extractable organic nitrogen (WEON),WEON,Water / Reciprocating Shaker / Centrifuge,Deionized Water,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_WEON_002,water extractable organic nitrogen (WEON),WEON,Slurry,Deionized Water,0.048611111,m/v,10 min,TN Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Cookson, W. R., Murphy, D. V., and Roper, M. M. (2008). Characterizing the relationships between soil organic matter components and microbial function and composition along a tillage disturbance gradient. Soil Biol. Biochem. 40, 763–777. doi: 10.1016/j.soilbio.2007.10.011",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_WEON_003,water extractable organic nitrogen (WEON),WEON,Water / Reciprocating Shaker / Centrifuge,Deionized Water,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_WSCN_001,water soluble C:N ratio,WSCN,Water / Reciprocating Shaker / Centrifuge,Deionized Water,0.055555556,m/m,10 min,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_WSC_001,water soluble carbon,WSC,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_WSC_002,water soluble carbon,WSC,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013. Method S-15.1",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_WSOC_001,water-soluble organic carbon (WSOC),WSOC,Water / Reciprocating Shaker / Centrifuge,Water Extraction,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_WSOC_002,water-soluble organic carbon (WSOC),WSOC,Water / Reciprocating Shaker / Centrifuge,Water Extraction,0.055555556,m/m,10 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Richard L. Haney, Alan. J. Franzluebbers, Virginia. L. Jin, Mari-Vaughn. Johnson, Elizabeth. B. Haney, Mike. J. White, Robert. D. Harmel 2012. Soil Organic C:N vs. Water-Extractable Organic C:N. J Soil Science  2: 269-274.",,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_001,zinc,ZN,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_002,zinc,ZN,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_ZN_003,zinc,ZN,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZN_004,zinc,ZN,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_005,zinc,ZN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3050A/B Digestion (Nitric Acid, Hydr"" → ""EPA 3050A/B Digestion (HNO3, HCl), EPA 6"" | 2026-04-03: Final audit fixes applied",Extraction ratio may vary
+SOIL,L_MODV2_SOIL_ZN_006,zinc,ZN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3051A/B Microwave Digestion (Nitric "" → ""EPA 3051A/B Microwave Digestion (HNO3, H""",
+SOIL,L_MODV2_SOIL_ZN_007,zinc,ZN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,US-EPA,,,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""EPA 3052 MIcrowave Digestion (Nitric Aci"" → ""EPA 3052 Microwave Digestion (HNO3, HF),""",
+SOIL,L_MODV2_SOIL_ZN_008,zinc,ZN,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_009,zinc,ZN,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZN_010,zinc,ZN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_011,zinc,ZN,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_012,zinc,ZN,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_ZN_013,zinc,ZN,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZN_014,zinc,ZN,Mehlich 3,Mehlich 3 to DTPA (Calculation),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_015,zinc,ZN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg | 2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZN_016,zinc,ZN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,v/v,5 min,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass. | 2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZN_017,zinc,ZN,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_018,zinc,ZN,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,SUPERSEDED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+SOIL,L_MODV2_SOIL_ZN_019,zinc,ZN,Nitric Acid,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_ZN_020,zinc,ZN,Plant Root Simulator,Plant Root Simulator - PRS (0.5 M HCl),Saturated paste,in situ probe,60 min acid leaching,ICP-OES,MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_021,zinc,ZN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,180 min,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_022,zinc,ZN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_023,zinc,ZN,Plant Root Simulator,Plant Root Simulator - PRS,Saturated paste,in situ probe,24 hrs,ICP-OES,MEASURED,mg/m2,mg1[m2]-1,MilliGM-PER-M2,http://qudt.org/vocab/unit/MilliGM-PER-M2,Western Ag Innovations,"2013.  Ion Supply Rates Using PRS® Probes, pp. 1149-152 in R. O. Miller, R Gavlak and D Horneck, eds. Soil, Plant and Water Reference Methods for the Western Region.  WREP-125, 4th Edition.",,PROPRIETARY,VALID,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_024,zinc,ZN,Saturated paste,"Soil saturated with DI water, subsequent extraction and retained for analysis",Saturated paste,m/m,4 hrs,"ICP-OES, AAS",MEASURED,mg/L,mg1L-1,MilliGM-PER-L,http://qudt.org/vocab/unit/MilliGM-PER-L,USDA,"US Salinity Staff, 1954. L.A Richards (ed.) Diagnosis and improvement of saline alkali soils. 160 p.  USDA Handb. 60 US Govt. Print Office, Washington DC.",,PROVISIONAL,VALID,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology harmonization — cross-matrix consistency pass.,
+SOIL,L_MODV2_SOIL_ZN_025,zinc,ZN,Calcium Chloride,0.01 M CaCl2,0.048611111,m/v,120 min,ICP-MS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,WEPAL,"Houba, V.J.G.; Novozamsky, I.; Lexmond, T.M.; Van der Lee, J.J., 2008.  Applicability of 0.01 M CaCl2 as a single extraction solution for the assessment of the nutrient status of soils and other diagnostic purposes. Communications in Soil Science and Plant Analysis, Volume 21, 1990 - Issue 19-20.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_026,zinc,ZN,DTPA,"DTPA (0.005 M DTPA, 0.01 M CaCl2 and 0.10 M Triethanolamine adjusted to pH 7.3)",0.043055556,m/v,120 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.10",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_027,zinc,ZN,DTPA-Sorbitol,"DTPA-Sorbitol (0.005 M DTPA, 0.01 M CaCl2  and 0.10 M Triethanolamine and 0.20 M of Sorbitol, adjusted to pH 7.3 and .)",0.043055556,m/v,120 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"WERA-103, SERA 6","Soil, Plant and Water Reference Methods for the Western Region, 4th Edition, 2013, WERA-103. Method S-6.12",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_028,zinc,ZN,EDTA,EDTA (0.04 M EDTA),0.00072338,m/v,120 min,AAS,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NZJAR,"R. G. McLaren , R. S. Swift & B. F. Quin (1984) EDTA-extractable copper, zinc, and manganese in soils of the Canterbury Plains, New Zealand Journal of Agricultural Research",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_029,zinc,ZN,EPA 3050A/B,"EPA 3050A/B Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.052083333,m/v,"Heat to 95C, reflux for 15 minutes, cool, then add 5 mL HNO3 and reflux for 30 minutes. Repeat last step as required.",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,"U.S. EPA. 1996. “Method 3050B: Acid Digestion of Sediments, Sludges, and Soils,” Revision 2. Washington, DC. / EPA Method 3050B (SW-846): Acid Digestion of Sediments, Sludges, and Soils, 1996.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,Extraction ratio may vary
+SOIL,L_MODV2_SOIL_ZN_030,zinc,ZN,EPA 3051A/B,"EPA 3051A/B Microwave Digestion (HNO3, HCl), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_031,zinc,ZN,EPA 3052,"EPA 3052 Microwave Digestion (HNO3, HF), EPA 6010B (ICP-OES)",0.048611111,,,,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,US-EPA,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_032,zinc,ZN,H3A-1,H3A-1 Extractant (H3A-1 0.0024 M citric acid + 0.004 M oxalic acid + 0.004 M malic acid at pH 3.75 ),0.048611111,m/v,10 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,"Haney, R. L., et al. ""Modifications to the new soil extractant H3A-1: A multinutrient extractant."" Communications in soil science and plant analysis 41.12 (2010): 1513-1523.",,PROVISIONAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_033,zinc,ZN,Hydrochloric Acid,0.1 M HCl,0.044444444,m/v,30 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"NCERA-13, NECC-1812","North Central Regional Research Publication No. 221 (Revised 2015), Chapter 9, pp 9.2-9.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_034,zinc,ZN,Ion Exchange Resin,Resin Extraction - Unibest (0.5 M HCl),Saturated paste,in situ capsule,"4 days, 1 hour acid leaching",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,"UniBest, Inc",https://www.unibestinc.com/about,,PROPRIETARY,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_035,zinc,ZN,Lancaster,"Lancaster Extraction (Solution A:0.05 M HCl, Solution B: 1.57 M glacial acetic acid, 0.063 M malonic acid, 0.089 M malic acid, 0.032 M ammonium fluoride, 0.012 M aluminum chloride hexahydrate)",0.045138889,m/v,"Soil+Solution A, sit for 10 minutes. Add Solution B, shake for 10 minutes",ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.4",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_036,zinc,ZN,Mehlich 1,Mehlich 1 (0.05 M HCl + 0.0125 M H2SO4),0.045138889,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_037,zinc,ZN,Mehlich 2,Mehlich 2 (0.2 N CH3COOH + 0.015 N NH4F + 0.2 N NH4Cl + 0.012 N HCl),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NCSU,"Mehlich A. 1978. New extractant for soil test evaluation of phosphorus, potassium, magnesium, calcium, sodium, manganese and zinc. Commun Soil Sci Plant Anal 9(6):477-92.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_038,zinc,ZN,Mehlich 3,Mehlich 3 to DTPA (Calculation),Calculation,Calculation,Calculation,ICP-OES,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_039,zinc,ZN,Mehlich 3,Mehlich 3 (0.2 N CH3COOH + 0.25 N NH4NO3 + 0.013 N HNO3 + 0.015 N NH4F + 0.001 M EDTA),0.048611111,m/v,5 min,"ICP-OES, AAS",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,SERA-6,"Soil Test Methods From the Southeastern United States, SERA-IEG-6, 2014, Chapter 4.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_040,zinc,ZN,Morgan,Morgan (0.72 N NaOAc + 0.52 N CH3COOH),0.045138889,v/v,15 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZN_041,zinc,ZN,Modified Morgan,Modified Morgan (0.62 N NH4OH + 1.25 N CH3COOH),0.048611111,m/v,15 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,NECC-1812,"Recommended Soil Testing Procedures for the Northeastern United States, NECC-1812 Publication No. 493, 3rd Edition, 2011, Chapter 5.",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_ZINDEX_001,zinc index,ZINDEX,Mehlich 3 ICP,,,,,"ICP-OES, AAS",MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+SOIL,L_MODV2_SOIL_ZNCURATIO_001,Zn:Cu ratio,ZNCURATIO,Mehlich 3,,,,,ICP-OES,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,2026-04-02T12:00:00Z,Analyte Measurement Method clarified: ICP → ICP-OES,
+SOIL,L_MODV2_SOIL_ZNCURATIO_002,Zn:Cu ratio,ZNCURATIO,,,,,,Calculation,MEASURED,ratio,ratio,UNITLESS,http://qudt.org/vocab/unit/UNITLESS,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+SOIL,L_MODV2_SOIL_NULL_001,,NULL,,,,,,,MEASURED,,none,UNITLESS,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-13T12:00:00Z,,,
+,,,,,,,,,,,,,,,,,,,,,,,
+,,,,,,,,,,,,,,,,,,,,,,,
+,,,,,,,,,,,,,,,,,,,,,,,
diff --git a/Method Lists/Modus 2/Modus2 Manure 1.1.0.xlsx b/Method Lists/Modus 2/Modus2 Manure 1.1.0.xlsx
new file mode 100644
index 0000000..0fed535
Binary files /dev/null and b/Method Lists/Modus 2/Modus2 Manure 1.1.0.xlsx differ
diff --git a/Method Lists/Modus 2/Modus2 Manure v1.0.1.xlsx b/Method Lists/Modus 2/Modus2 Manure v1.0.1.xlsx
deleted file mode 100644
index ad99964..0000000
Binary files a/Method Lists/Modus 2/Modus2 Manure v1.0.1.xlsx and /dev/null differ
diff --git a/Method Lists/Modus 2/Modus2 Manure.csv b/Method Lists/Modus 2/Modus2 Manure.csv
index 945aaf7..fecc4de 100644
--- a/Method Lists/Modus 2/Modus2 Manure.csv	
+++ b/Method Lists/Modus 2/Modus2 Manure.csv	
@@ -1,133 +1,176 @@
-v2 Code,v1 Code,Matrix,Analyte,Analyte Code,Extraction Name,Extraction Name v2 Code,Extraction reagents/formulation,Extraction Ratio,Extraction Basis,Extraction Time,Analyte Measurement,v2 Analyte Measurement Code,Observation Category,Reporting Unit,Unit Code,Acceptance,Status,Organization,Citation,Row Added Date,Row Changed Date,Change Comment
-L_MODV2_MANURE_5DAYGERM_001,M-5DAYGERM,MANURE,5 day germination,5DAYGERM,,,,,,,,,,None,None,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_7DAYVIGOR_001,M-7DVIGOR,MANURE,7 day vigor,7DAYVIGOR,,,,,,,,,,None,None,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NH3N_001,M-NH4.12.05,MANURE,ammonia-nitrogen,NH3N,Water,WATER,Steam distillation,Varies,As Received,,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NH3N_002,M-NH4.12.07,MANURE,ammonia-nitrogen,NH3N,Water,WATER,Steam distillation,Varies,As Received,,Titration,TITRATION,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NH3N_003,M-NH4.12.02,MANURE,ammonia-nitrogen,NH3N,Water,WATER,Steam distillation,Varies,As Received,,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NH4N_001,,MANURE,ammonium-nitrogen,NH4N,Water,WATER,Reagent grade water,Varies,As Received,20 min,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.1",5-Nov-24,,
-L_MODV2_MANURE_NH4N_002,,MANURE,ammonium-nitrogen,NH4N,Potassium chloride,POTASSIUM_CHLORIDE,Acidified 1.0 M KCl,Varies,As Received,30 min,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",5-Nov-24,,
-L_MODV2_MANURE_NH4N_003,,MANURE,ammonium-nitrogen,NH4N,Sodium hydroxide,SODIUM_HYDROXIDE,10 M NaOH,Varies,As Received,30 min,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",5-Nov-24,,
-L_MODV2_MANURE_NH4N_004,,MANURE,ammonium-nitrogen,NH4N,Sodium hydroxide,SODIUM_HYDROXIDE,10 M NaOH,Varies,As Received,20 min,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.1",5-Nov-24,,
-L_MODV2_MANURE_NH4N_005,,MANURE,ammonium-nitrogen,NH4N,Water,WATER,Acidified 1.0 M KCl,Varies,As Received,30 min,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",5-Nov-24,,
-L_MODV2_MANURE_NH4N_006,M-NH4.13.05,MANURE,ammonium-nitrogen,NH4N,Potassium chloride,POTASSIUM_CHLORIDE,Acidified 1.0 M KCl,Varies,As Received,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",5-Nov-24,,
-L_MODV2_MANURE_AS_001,M-AS.11.05,MANURE,arsenic,AS,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_B_001,M-B.10.05,MANURE,boron,B,Nitric-Perchloric Acid Digestion,NITRIC_PERCHLORIC_ACID,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_B_002,M-B.15.08,MANURE,boron,B,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_B_003,,MANURE,boron,B,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_BD_001,M-BD.00.01,MANURE,bulk density,BD,,,,,,,Gravimetric,GRAVIMETRIC,,g/cm3,g1[cm3]-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_CNRATIO_001,M-C:N.04.06,MANURE,C:N ratio,CNRATIO,Combustion,COMBUSTION,Combustion,N/A,Dry basis,Varies,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-2.1",5-Nov-24,,
-L_MODV2_MANURE_CD_001,M-CD.11.05,MANURE,cadmium,CD,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CA_001,M-CA.10.05,MANURE,calcium,CA,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_CA_002,M-CA.11.05,MANURE,calcium,CA,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CA_003,M-CA.15.08,MANURE,calcium,CA,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CA_004,,MANURE,calcium,CA,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CACO3EQ_001,,MANURE,calcium carbonate equivalent,CACO3EQ,Hydrochloric Acid,HYDROCHLORIC_ACID,0.5 M HCL,Varies,v/m or v/v,Varies,Titration,TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-7.1",5-Nov-24,,
-L_MODV2_MANURE_TC_001,M-TC,MANURE,"carbon, total",TC,Combustion,COMBUSTION,Combustion,N/A,Dry basis,Varies,Combustion Analyzer,COMBUSTION_ANALYZER,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-2.1",5-Nov-24,,
-L_MODV2_MANURE_TC_002,,MANURE,"carbon, total",TC,Combustion,COMBUSTION,Combustion,N/A,As Received,Varies,Thermal Conductivity,THERMAL_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-2.1",5-Nov-24,21-May-25,Aligned reagent with other combustion methods
-L_MODV2_MANURE_TOC_001,M-TOC.05.07,MANURE,"carbon, total organic",TOC,Heat of Dilution,HEAT_OF_DILUTION,,,,,Titration,TITRATION,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_CL_001,M-CL.00.07,MANURE,chloride,CL,Acetic Acid,ACETIC_ACID,2.0% glacial acetic acid,Varies,m/v,30 min,Potentiometric,POTENTIOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.1)",5-Nov-24,,
-L_MODV2_MANURE_CL_002,,MANURE,chloride,CL,Acetic Acid,ACETIC_ACID,2.0% glacial acetic acid,Varies,v/v,30 min,Potentiometric,POTENTIOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",5-Nov-24,,
-L_MODV2_MANURE_CL_003,,MANURE,chloride,CL,Acetic Acid,ACETIC_ACID,2.0% glacial acetic acid,Varies,m/v,30 min,Coulometry,COULOMETRY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.2 (7.1.1)",5-Nov-24,,
-L_MODV2_MANURE_CL_004,,MANURE,chloride,CL,Acetic Acid,ACETIC_ACID,2.0% glacial acetic acid,Varies,v/v,30 min,Coulometry,COULOMETRY,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",5-Nov-24,,
-L_MODV2_MANURE_CL_005,M-CL.13.05,MANURE,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,0.01 M Ca(NO3)2 · 4H2O,Varies,m/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.1)",5-Nov-24,,
-L_MODV2_MANURE_CL_006,,MANURE,chloride,CL,Calcium Nitrate,CALCIUM_NITRATE,0.01 M Ca(NO3)2 · 4H2O,Varies,v/v,30 min,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.2)",5-Nov-24,,
-L_MODV2_MANURE_CR_001,M-CR.11.05,MANURE,chromium,CR,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CR_002,,MANURE,chromium,CR,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CO_001,M-CO.11.05,MANURE,cobalt,CO,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_COLIFORM_FECAL_001,M-FCOL.00.03,MANURE,"coliform, fecal",COLIFORM_FECAL,,,,,,,Microbiological,MICROBIOLOGICAL,,MPN/g,mpn1g-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_COLIFORM_TOTAL_001,M-TCOL.00.03,MANURE,"coliform, total",COLIFORM_TOTAL,,,,,,,Microbiological,MICROBIOLOGICAL,,MPN/g,mpn1g-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_CU_001,M-CU.10.05,MANURE,copper,CU,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_CU_002,M-CU.11.05,MANURE,copper,CU,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CU_003,M-CU.15.08,MANURE,copper,CU,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_CU_004,,MANURE,copper,CU,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_ECOLI_001,M-ECOLI.00.03,MANURE,e.coli,ECOLI,,,,,,,Microbiological,MICROBIOLOGICAL,,cfu/ml,cfu1ml-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_EC_001,M-COND,MANURE,electrical conductivity,EC,,,,,,,,,MEASURED,dS/m,dS1m-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_EC_002,,MANURE,electrical conductivity,EC,Manure to Water Slurry,MANURE_H2O_SLURRY,Water,1:1,As Received,,Potentiometric,POTENTIOMETRIC,MEASURED,dS/m,dS1m-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_EC_003,M-EC.01.04,MANURE,electrical conductivity,EC,Manure to Water Slurry,MANURE_H2O_SLURRY,Water,1:2,As Received,30 min,Potentiometric,POTENTIOMETRIC,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.3)",5-Nov-24,,
-L_MODV2_MANURE_EC_004,,MANURE,electrical conductivity,EC,Manure to Water Slurry,MANURE_H2O_SLURRY,Water,1:5,As Received,30 min,Potentiometric,POTENTIOMETRIC,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.4)",5-Nov-24,,
-L_MODV2_MANURE_EC_005,,MANURE,electrical conductivity,EC,Direct Measurement,DIRECT_MEASUREMENT,N/A,N/A,As Received,N/A,Potentiometric,POTENTIOMETRIC,MEASURED,dS/m,dS1m-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.2)",5-Nov-24,,
-L_MODV2_MANURE_HUMICACID_001,M-HA.00.01,MANURE,humic acid,HUMICACID,,,,,,,Gravimetric,GRAVIMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_FE_001,M-FE.10.05,MANURE,iron,FE,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_FE_002,M-FE.11.05,MANURE,iron,FE,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_FE_003,M-FE.15.08,MANURE,iron,FE,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_FE_004,,MANURE,iron,FE,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_PB_001,M-PB.11.05,MANURE,lead,PB,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MG_001,M-MG.10.05,MANURE,magnesium,MG,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_MG_002,M-MG.11.05,MANURE,magnesium,MG,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MG_003,M-MG.15.08,MANURE,magnesium,MG,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MG_004,,MANURE,magnesium,MG,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MMM_001,M-MMM.00.01,MANURE,man made materials,MMM,,,,,,,Gravimetric,GRAVIMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_MN_001,M-MN.10.05,MANURE,manganese,MN,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_MN_002,M-MN.11.05,MANURE,manganese,MN,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MN_003,M-MN.15.08,MANURE,manganese,MN,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MN_004,,MANURE,manganese,MN,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_MATURITYINDEX_001,M-MI.00.04,MANURE,maturity index,MATURITYINDEX,,,,,,,Solvita,SOLTIVA,,None,None,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_HG_001,M-HG.03.05,MANURE,mercury,HG,Aqua Regia/Potassium Permanganate,AQUA_REGIA_KMNO4,,,,,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_GWC_001,M-MOIST.00.01,MANURE,moisture content,GWC,Oven,OVEN_DRYING,Sample heated to constant weight at 105 C,N/A,As Received,Varies,Gravimetric,GRAVIMETRIC,CALCULATED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",5-Nov-24,,
-L_MODV2_MANURE_MO_001,M-MO.11.05,MANURE,molybdenum,MO,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.3",5-Nov-24,,
-L_MODV2_MANURE_NI_001,M-NI.11.05,MANURE,nickel,NI,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_NO3N_001,M-NO3.06.05,MANURE,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,Varies,As Received,30 min,"Cd or N2H4 reduction, Spectrophotometric",CD_SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",5-Nov-24,,
-L_MODV2_MANURE_NO3N_002,,MANURE,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,2.0 M KCl,Varies,As Received,30 min,"Cd or N2H4 reduction, Spectrophotometric",CD_SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",5-Nov-24,,
-L_MODV2_MANURE_NO3N_003,,MANURE,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,Acidified 1.0 M KCl,Varies,As Received,30 min,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",5-Nov-24,,
-L_MODV2_MANURE_NO3N_004,M-NO3N.06.02,MANURE,nitrate-nitrogen,NO3N,Potassium Chloride,POTASSIUM_CHLORIDE,1.0 M KCl,Varies,As Received,30 min,Ion Selective Electrode,ION_SELECTIVE_ELECTRODE,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NO3N_005,M-NO3N.13.05,MANURE,nitrate-nitrogen,NO3N,Water,WATER,Reagent grade water,Varies,As Received,,"Cd or N2H4 reduction, Spectrophotometric",CD_SPECTROPHOTOMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_TKN_001,M-TKN.07.07,MANURE,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Distillation/Titration ,DISTILLATION_TITRATION,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",5-Nov-24,21-May-25,Clarified TKN vs TN
-L_MODV2_MANURE_TKN_002,,MANURE,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",5-Nov-24,21-May-25,Clarified TKN vs TN
-L_MODV2_MANURE_TKN_003,,MANURE,"nitrogen, total",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",5-Nov-24,21-May-25,Clarified TKN vs TN
-L_MODV2_MANURE_TKN_004,M-TN.04.06,MANURE,"nitrogen, total",TKN,Combustion,COMBUSTION,Oxygen,N/A,As Received,Varies,Thermal Conductivity,THERMAL_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.1",5-Nov-24,21-May-25,Clarified TKN vs TN
-L_MODV2_MANURE_TKN_005,,MANURE,"nitrogen, total",TKN,Water,WATER,30% solid to liquid ratio,Varies,As Received,,Near Infra-red Reflectance,NIR_REFLECTANCE,MEASURED,%,prcnt,EXPERIMENTAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.3",5-Nov-24,21-May-25,Clarified TKN vs TN
-L_MODV2_MANURE_TKN_006,M-TKN.07.07,MANURE,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Distillation/Titration ,DISTILLATION_TITRATION,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",21-May-25,,
-L_MODV2_MANURE_TKN_007,,MANURE,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",21-May-25,,
-L_MODV2_MANURE_TKN_008,,MANURE,"nitrogen, total kjeldahl",TKN,Kjeldahl,KJELDAHL,Sulfuric Acid Digest / Catalyst,Varies,As Received,Varies,Diffusion Conductivity,DIFFUSION_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",21-May-25,,
-L_MODV2_MANURE_TN_001,M-TN.04.06,MANURE,"nitrogen, total",TN,Combustion,COMBUSTION,Combustion,N/A,As Received,Varies,Thermal Conductivity,THERMAL_CONDUCTIVITY,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.1",21-May-25,,
-L_MODV2_MANURE_TN_002,,MANURE,"nitrogen, total",TN,Water,WATER,30% solid to liquid ratio,Varies,As Received,,Near Infra-red Reflectance,NIR_REFLECTANCE,MEASURED,%,prcnt,EXPERIMENTAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.3",21-May-25,,
-L_MODV2_MANURE_NWI_001,M-WINSOLN,MANURE,"nitrogen, water insoluble ",NWI,,,,,,,,,,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_NWS_001,M-WSOLN,MANURE,"nitrogen, water soluble",NWS,,,,,,,,,,mg/kg,mg1kg-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_OM_001,M-OM.08.01,MANURE,organic matter,OM,Loss on Ignition (LOI),LOSS_ON_IGNITION,,,,,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_PH_001,M-PH.01.04,MANURE,pH,PH,Manure to Water Slurry,MANURE_H2O_SLURRY,Water,1:2,As Received,N/A,pH Electrode,PH_ELECTRODE,MEASURED,S.U.,su,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-8.1 (7.3)",5-Nov-24,,
-L_MODV2_MANURE_PH_002,,MANURE,pH,PH,Direct Measurement,DIRECT_MEASUREMENT,N/A,N/A,As Received,N/A,pH Electrode,PH_ELECTRODE,MEASURED,S.U.,su,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-8.1 (7.2)",5-Nov-24,,
-L_MODV2_MANURE_PH_003,,MANURE,pH,PH,Manure to Water Slurry,MANURE_H2O_SLURRY,,1:1,,N/A,pH Electrode,PH_ELECTRODE,MEASURED,S.U.,su,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_PO4_001,M-P2O5.02.05,MANURE,phosphate,PO4,Acetic Acid,ACETIC_ACID,2% Acetic Acid Extraction,,,,ICP-OES,ICP-OES,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_PO4P_001,M-P2O5P.02.05,MANURE,phosphate-phosphorus,PO4P,Acetic Acid,ACETIC_ACID,2% Acetic Acid Extraction,,,,ICP-OES,ICP-OES,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_P_001,M-TP.10.05,MANURE,phosphorus,P,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,AOAC International,AOAC 935.13A ,5-Nov-24,21-May-25,Duplicate due to iIncorrect extraction name
-L_MODV2_MANURE_P_002,,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,21-May-25,"Duplicate, incorrect analyte measurement"
-L_MODV2_MANURE_P_003,,MANURE,phosphorus,P,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_P_004,,MANURE,phosphorus,P,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Combustion,N/A,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.2",5-Nov-24,21-May-25,"Duplicate, incorrect analyte measurement"
-L_MODV2_MANURE_P_005,M-P.15.08,MANURE,phosphorus,P,Nitric Acid,NITRIC_ACID,"Nitric acid, concentrated",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.3",5-Nov-24,21-May-25,Corrected v1 reference
-L_MODV2_MANURE_P_006,,MANURE,phosphorus,P,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,AOAC International,AOAC 935.13A ,5-Nov-24,21-May-25,Incorrect Method name
-L_MODV2_MANURE_P_007,,MANURE,phosphorus,P,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Combustion,N/A,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.3",5-Nov-24,21-May-25,"Duplicate, incorrect analyte measurement"
-L_MODV2_MANURE_P_008,M-TP.11.05,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,21-May-25,"Duplicate, incorrect analyte measurement"
-L_MODV2_MANURE_P_009,,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,21-May-25,,
-L_MODV2_MANURE_P_010,M-TP.10.05,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,21-May-25,,
-L_MODV2_MANURE_P_011,,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",21-May-25,,
-L_MODV2_MANURE_P_012,M-TP.11.05,MANURE,phosphorus,P,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",21-May-25,,
-L_MODV2_MANURE_P_013,,MANURE,phosphorus,P,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Combustion,N/A,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.2",21-May-25,,
-L_MODV2_MANURE_P_014,,MANURE,phosphorus,P,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Combustion,N/A,As Received,Varies,Spectrophotometric,SPECTROPHOTOMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.3",21-May-25,,
-L_MODV2_MANURE_P_WATER_EXTRACTABLE_001,,MANURE,"phosphorus, water extractable ",P_WATER_EXTRACTABLE,Water,WATER,Water,100:1 V:S,v/m,60 min,ICP-OES,ICP-OES,MEASURED,g/kg,g1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-6.1",5-Nov-24,,
-L_MODV2_MANURE_K_001,M-TK.10.06,MANURE,potassium,K,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_K_002,M-K.15.08,MANURE,potassium,K,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_K_003,,MANURE,potassium,K,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_K_004,M-TK.11.05,MANURE,potassium,K,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SOLUBLE_K_001,M-SOLK.02.05,MANURE,"potassium, soluble",SOLUBLE_K,Acetic Acid,ACETIC_ACID,2% Acetic Acid Extraction,,,,Spectrophotometric,SPECTROPHOTOMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SALMONELLA_001,M-SAL.00.03,MANURE,salmonella,SALMONELLA,,,,,,,Microbiological,MICROBIOLOGICAL,,cfu/ml,cfu1ml-1,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SE_001,M-SE.11.05,MANURE,selenium,SE,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_NA_001,M-NA.10.05,MANURE,sodium,NA,Nitric-Perchloric Acid Digestion,MICROWAVE_OPEN_VESSEL,"Nitric acid, perchloric acid",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,AOAC International,AOAC 935.13A ,5-Nov-24,,
-L_MODV2_MANURE_NA_002,M-NA.11.05,MANURE,sodium,NA,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP,ICP,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_NA_003,M-NA.15.08,MANURE,sodium,NA,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_NA_004,,MANURE,sodium,NA,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_SOLIDS_FIXED_001,M-ASH.09.01,MANURE,"solids, fixed",SOLIDS_FIXED,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Total solid residue heated to constant weight at 550 C,N/A,Dry Basis,Varies,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-1.1",5-Nov-24,,
-L_MODV2_MANURE_SOLIDS_001,M-DM.14.01,MANURE,"solids, total",SOLIDS,Oven drying,OVEN,Sample heated to constant weight at 105 C,N/A,As Received,Varies,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",5-Nov-24,,
-L_MODV2_MANURE_SOLIDS_002,M-TS.00.01,MANURE,"solids, total",SOLIDS,Oven drying,OVEN,Sample heated to constant weight at 105 C,N/A,As Received,60 min,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",5-Nov-24,,
-L_MODV2_MANURE_SOLIDS_003,,MANURE,"solids, total",SOLIDS,Oven drying,OVEN,Dry to constant weight at 80 C,N/A,As Received,60 min,Gravimetric,GRAVIMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SOLIDS_004,,MANURE,"solids, total",SOLIDS,Oven drying,OVEN,Dry to constant weight at 70 C,N/A,As Received,60 min,Gravimetric,GRAVIMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SOLID_VOLATILE_001,,MANURE,"solids, volatile ",SOLID_VOLATILE,Muffle Furnace Dry Ashing ,MUFFLE_FURNACE_DRY_ASHING,Total solid residue heated to constant weight at 550 C,N/A,Dry Basis,Varies,Gravimetric,GRAVIMETRIC,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-1.1",5-Nov-24,,
-L_MODV2_MANURE_SO4_001,M-SO4.02.05,MANURE,sulfate,SO4,Acetic Acid,ACETIC_ACID,2% Acetic Acid Extraction,,,,Spectrophotometric,SPECTROPHOTOMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_SO4S_001,M-SO4S.02.05,MANURE,sulfate-sulfur,SO4S,Acetic Acid,ACETIC_ACID,2% Acetic Acid Extraction,,,,Spectrophotometric,SPECTROPHOTOMETRIC,,%,prcnt,EXPERIMENTAL,RETIRED,,,5-Nov-24,,
-L_MODV2_MANURE_S_001,M-S.11.05,MANURE,sulfur,S,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,21-May-25,"Invalid, duplicate"
-L_MODV2_MANURE_S_002,,MANURE,sulfur,S,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_S_003,M-S.15.08,MANURE,sulfur,S,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_S_004,M-ZN.15.08,MANURE,sulfur,S,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,SUPERSEDED,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,21-May-25,Invalid Duplicate
-L_MODV2_MANURE_S_005,M-S.11.05,MANURE,sulfur,S,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,%,prcnt,OFFICIAL,INVALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",21-May-25,,
-L_MODV2_MANURE_ZN_001,M-ZN.11.05,MANURE,zinc,ZN,Microwave Digestion Open Vessel,MICROWAVE_OPEN_VESSEL,"Nitric acid, hydrochloric acid, peroxide",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_ZN_002,M-ZN.10.05,MANURE,zinc,ZN,Microwave Digestion Closed Vessel,MICROWAVE_CLOSED_VESSEL,Nitric acid,Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-1,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",5-Nov-24,,
-L_MODV2_MANURE_ZN_003,M-ZN.15.08,MANURE,zinc,ZN,Nitric Acid,NITRIC_ACID,"Nitric acid, concentrated",Varies,As Received,Varies,ICP-OES,ICP-OES,MEASURED,mg/kg,mg1kg-2,OFFICIAL,VALID,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",21-May-25,,
+Matrix,V2 Code,Analyte,Analyte Code,Common Method Name,Extraction reagents/formulation,Extraction Ratio,Extraction Basis,Extraction Time,Analyte Measurement Method,Observation Category,Reporting Unit,UoM Code,QUDT Code,QUDT URI,Citation Organization,Citation,Citation Link,Acceptance,Status,Row Added Date,Row Changed Date,Change Comment,Notes
+MANURE,L_MODV2_MANURE_5DAYGERM_001,5 day germination,5DAYGERM,,,,,,,,,,,,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_7DAYVIGOR_001,7 day vigor,7DAYVIGOR,,,,,,,,,,,,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NH3N_001,ammonia-nitrogen,NH3N,Water,Steam distillation,Varies,As Received,,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NH3N_002,ammonia-nitrogen,NH3N,Water,Steam distillation,Varies,As Received,,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NH3N_003,ammonia-nitrogen,NH3N,Water,Steam distillation,Varies,As Received,,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NH4N_001,ammonium-nitrogen,NH4N,Water,Deionized Water,Varies,As Received,20 min,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.1",,OFFICIAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,RETIRED: ISE method requires NaOH treatment; NH4N_004 (ISE + NaOH) is the correct entry | 2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NH4N_002,ammonium-nitrogen,NH4N,Potassium chloride,Acidified 1.0 M KCl,Varies,As Received,30 min,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NH4N_003,ammonium-nitrogen,NH4N,Sodium Hydroxide,10 M NaOH,Varies,As Received,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",,OFFICIAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,RETIRED: Titration method not used in practice | 2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NH4N_004,ammonium-nitrogen,NH4N,Sodium Hydroxide,10 M NaOH,Varies,As Received,20 min,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NH4N_005,ammonium-nitrogen,NH4N,Water,Acidified 1.0 M KCl,Varies,As Received,30 min,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",,OFFICIAL,RETIRED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,RETIRED: Titration method not used in practice,
+MANURE,L_MODV2_MANURE_NH4N_006,ammonium-nitrogen,NH4N,Potassium chloride,Acidified 1.0 M KCl,Varies,As Received,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NH4N_007,ammonium-nitrogen,NH4N,Potassium Chloride,1.0 M KCl,Varies,As Received,Varies,Distillation,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,New method added,New method: KCl extraction + steam distillation for NH4-N in manure
+MANURE,L_MODV2_MANURE_AS_001,arsenic,AS,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_AS_002,arsenic,AS,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_BA_001,barium,BA,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,New method added,"New analyte: barium in manure, microwave open vessel"
+MANURE,L_MODV2_MANURE_BA_002,barium,BA,Open Vessel Hot Plate Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,New method added,"New analyte: barium in manure, open vessel hot plate"
+MANURE,L_MODV2_MANURE_B_001,boron,B,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_B_002,boron,B,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_B_003,boron,B,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_B_004,boron,B,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_B_005,boron,B,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_B_006,boron,B,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_BD_001,bulk density,BD,,,,,,Gravimetric,,g/cm3,g1[cm3]-1,GM-PER-CentiM3,http://qudt.org/vocab/unit/GM-PER-CentiM3,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_CNRATIO_001,C:N ratio,CNRATIO,Dry Combustion,O2,,Dry Basis,Varies,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-2.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed: ""Combustion"" → ""Dry Combustion"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+MANURE,L_MODV2_MANURE_CD_001,cadmium,CD,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CD_002,cadmium,CD,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CA_001,calcium,CA,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_CA_002,calcium,CA,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CA_003,calcium,CA,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CA_004,calcium,CA,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_CACO3EQ_001,calcium carbonate equivalent,CACO3EQ,Hydrochloric Acid,0.5 M HCl,Varies,v/m or v/v,Varies,Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-7.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_TC_001,"carbon, total",TC,Dry Combustion,O2,,Dry Basis,Varies,Combustion Analyzer,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-2.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,"Combustion method renamed: ""Combustion"" → ""Dry Combustion"" | 2026-04-03: Terminology harmonization — cross-matrix consistency pass.",
+MANURE,L_MODV2_MANURE_TC_002,"carbon, total",TC,Dry Combustion,O2,,As Received,Varies,Thermal Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-2.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Aligned reagent with other combustion methods; Combustion method renamed: ""Combustion"" → ""Dry Combustion""",
+MANURE,L_MODV2_MANURE_CL_001,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,m/v,30 min,Potentiometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.1)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_002,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,v/v,30 min,Potentiometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_003,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,m/v,30 min,Coulometry,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.2 (7.1.1)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_004,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,v/v,30 min,Coulometry,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_005,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2 · 4H2O,Varies,m/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.1)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_006,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2 · 4H2O,Varies,v/v,30 min,Spectrophotometric,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.2)",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_007,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,m/v,30 min,Potentiometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.1)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_008,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,v/v,30 min,Potentiometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_009,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,m/v,30 min,Coulometry,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.2 (7.1.1)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_010,chloride,CL,Acetic Acid,2.0% glacial acetic acid,Varies,v/v,30 min,Coulometry,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.3 (7.1.2)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_011,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2 · 4H2O,Varies,m/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.1)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CL_012,chloride,CL,Calcium Nitrate,0.01 M Ca(NO3)2 · 4H2O,Varies,v/v,30 min,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-10.1 (7.1.2)",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was mg/kg,
+MANURE,L_MODV2_MANURE_CR_001,chromium,CR,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CR_002,chromium,CR,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_CR_003,chromium,CR,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CR_004,chromium,CR,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_CO_001,cobalt,CO,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CO_002,cobalt,CO,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_COLIFORM_FECAL_001,"coliform, fecal",COLIFORM_FECAL,,,,,,Microbiological,,MPN/g,mpn1g-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_COLIFORM_TOTAL_001,"coliform, total",COLIFORM_TOTAL,,,,,,Microbiological,,MPN/g,mpn1g-1,Needs QUDT Discussion,Needs QUDT Discussion,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_CU_001,copper,CU,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_CU_002,copper,CU,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CU_003,copper,CU,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CU_004,copper,CU,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_CU_005,copper,CU,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_CU_006,copper,CU,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CU_007,copper,CU,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_CU_008,copper,CU,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_ECOLI_001,e.coli,ECOLI,,,,,,Microbiological,,cfu/ml,cfu1ml-1,NUM-PER-MilliL,http://qudt.org/vocab/unit/NUM-PER-MilliL,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_EC_001,electrical conductivity,EC,,,,,,,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_EC_002,electrical conductivity,EC,Manure to Water Slurry,Water,1:01,As Received,,Potentiometric,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_EC_003,electrical conductivity,EC,Manure to Water Slurry,Water,1:02,As Received,30 min,Potentiometric,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.3)",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_EC_004,electrical conductivity,EC,Manure to Water Slurry,Water,1:05,As Received,30 min,Potentiometric,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.4)",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_EC_005,electrical conductivity,EC,Direct Measurement,,,As Received,,Potentiometric,MEASURED,dS/m,dS1m-1,DeciS-PER-M,http://qudt.org/vocab/unit/DeciS-PER-M,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-9.1 (7.2)",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_HUMICACID_001,humic acid,HUMICACID,,,,,,Gravimetric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_FE_001,iron,FE,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_FE_002,iron,FE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_FE_003,iron,FE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_FE_004,iron,FE,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_FE_005,iron,FE,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_FE_006,iron,FE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_FE_007,iron,FE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_FE_008,iron,FE,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_PB_001,lead,PB,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_PB_002,lead,PB,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MG_001,magnesium,MG,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_MG_002,magnesium,MG,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MG_003,magnesium,MG,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MG_004,magnesium,MG,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_MG_005,magnesium,MG,Muffle Furnace Dry Ashing,O2,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,New method added,New method: muffle furnace dry ashing for Mg in manure
+MANURE,L_MODV2_MANURE_MMM_001,man made materials,MMM,,,,,,Gravimetric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_MN_001,manganese,MN,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_MN_002,manganese,MN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MN_003,manganese,MN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MN_004,manganese,MN,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_MN_005,manganese,MN,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_MN_006,manganese,MN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MN_007,manganese,MN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MN_008,manganese,MN,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_MN_009,manganese,MN,Muffle Furnace Dry Ashing,O2,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,New method added,New method: muffle furnace dry ashing for Mn in manure
+MANURE,L_MODV2_MANURE_MATURITYINDEX_001,maturity index,MATURITYINDEX,,,,,,Solvita,,,,,,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_HG_001,mercury,HG,Aqua Regia/Potassium Permanganate,,,,,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_GWC_001,moisture content,GWC,Oven Drying,"105 C, constant weight",,As Received,Varies,Gravimetric,CALCULATION,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Vocabulary normalization — controlled vocab alignment. | 2026-04-03: Oven Drying alignment — method name standardized; temp/condition detail moved to reagent field.,
+MANURE,L_MODV2_MANURE_MO_001,molybdenum,MO,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.3",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_MO_002,molybdenum,MO,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.3",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NI_001,nickel,NI,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NI_002,nickel,NI,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NO3N_001,nitrate-nitrogen,NO3N,Potassium Chloride,1.0 M KCl,Varies,As Received,30 min,"Cd or N2H4 reduction, Spectrophotometric",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NO3N_002,nitrate-nitrogen,NO3N,Potassium Chloride,2.0 M KCl,Varies,As Received,30 min,"Cd or N2H4 reduction, Spectrophotometric",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.3",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NO3N_003,nitrate-nitrogen,NO3N,Potassium Chloride,Acidified 1.0 M KCl,Varies,As Received,30 min,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-4.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_NO3N_004,nitrate-nitrogen,NO3N,Potassium Chloride,1.0 M KCl,Varies,As Received,30 min,ISE,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NO3N_005,nitrate-nitrogen,NO3N,Water,Deionized Water,Varies,As Received,,"Cd or N2H4 reduction, Spectrophotometric",MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_TKN_001,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Distillation/Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Clarified TKN vs TN in method name and code; Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TKN_002,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Clarified TKN vs TN in method name and code; Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TKN_003,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Clarified TKN vs TN in method name and code; Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TKN_004,"nitrogen, total",TKN,Combustion,O2,,As Received,Varies,Thermal Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.1",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Clarified TKN vs TN in method name and code; Reagent abbreviation: ""Oxygen"" → ""O2""",
+MANURE,L_MODV2_MANURE_TKN_005,"nitrogen, total",TKN,Water,30% solid to liquid ratio,Varies,As Received,,Near Infra-red Reflectance,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.3",,EXPERIMENTAL,SUPERSEDED,2024-11-05T12:00:00Z,2025-05-21T12:00:00Z,Clarified TKN vs TN in method name and code,
+MANURE,L_MODV2_MANURE_TKN_006,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Distillation/Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Analyte and code renamed: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte); Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TKN_007,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Analyte and code renamed: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte); Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TKN_008,"nitrogen, total",TKN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,SUPERSEDED,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Analyte and code renamed: ""nitrogen, total kjeldahl"" → ""nitrogen, total"" (Kjeldahl is method, not analyte); Reagent abbreviation: ""Sulfuric Acid Digest / Catalyst"" → ""H2SO4 / Catalyst""",
+MANURE,L_MODV2_MANURE_TN_001,"nitrogen, total",TN,Combustion,Combustion,,As Received,Varies,Thermal Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.1",,OFFICIAL,VALID,2025-05-21T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_TN_002,"nitrogen, total",TN,Water,30% solid to liquid ratio,Varies,As Received,,Near Infra-red Reflectance,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.3",,EXPERIMENTAL,VALID,2025-05-21T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_TN_003,"nitrogen, total",TN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Distillation/Titration,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,CANDIDATE,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,,
+MANURE,L_MODV2_MANURE_TN_004,"nitrogen, total",TN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,CANDIDATE,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,,
+MANURE,L_MODV2_MANURE_TN_005,"nitrogen, total",TN,Kjeldahl,H2SO4 / Catalyst,Varies,As Received,Varies,Diffusion Conductivity,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, M-3.2",,OFFICIAL,CANDIDATE,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,,
+MANURE,L_MODV2_MANURE_TN_006,"nitrogen, total",TN,Hicks Nitrogen TNb,None,1:5,,,Redox and Chemiluminescence,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,American Public Health Assn.,"Total Nitrogen by Redox and Chemiluminescence 4500-N NITROGEN in Standard Methods For the Examination of Water and Wastewater, 24th.",,OFFICIAL,CANDIDATE,2026-04-06T12:00:00Z,,New method added; submitted by NCDA&CS,Pending Agrisemantics code assignment (TN_006); reported unit harmonized from ppm to %
+MANURE,L_MODV2_MANURE_NWI_001,"nitrogen, water insoluble",NWI,,,,,,,,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_NWS_001,"nitrogen, water soluble",NWS,,,,,,,,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_TOC_001,"carbon, total organic",TOC,Heat of Dilution,,,,,Titration,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Terminology and chemical naming standardization pass.,
+MANURE,L_MODV2_MANURE_OM_001,organic matter,OM,Loss on Ignition (LOI),,,,,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_PH_001,pH,PH,Manure to Water Slurry,Water,1:02,As Received,,pH Electrode,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-8.1 (7.3)",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_PH_002,pH,PH,Direct Measurement,,,As Received,,pH Electrode,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-8.1 (7.2)",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_PH_003,pH,PH,Manure to Water Slurry,,1:01,,,pH Electrode,MEASURED,S.U.,su,PH,http://qudt.org/vocab/unit/PH,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_PO4_001,phosphate,PO4,Acetic Acid,2% Acetic Acid Extraction,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_PO4P_001,phosphate-phosphorus,PO4P,Acetic Acid,2% Acetic Acid Extraction,,,,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_P_001,phosphorus,P,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Duplicate due to iIncorrect extraction name; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_P_002,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Duplicate, incorrect analyte measurement; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_P_003,phosphorus,P,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_P_004,phosphorus,P,Muffle Furnace Dry Ashing,Combustion,,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2025-05-21T12:00:00Z,"Duplicate, incorrect analyte measurement",
+MANURE,L_MODV2_MANURE_P_005,phosphorus,P,Nitric Acid,HNO3 (concentrated),Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.3",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Corrected v1 reference; Reagent abbreviation: ""Nitric acid, concentrated"" → ""HNO3 (concentrated)""",
+MANURE,L_MODV2_MANURE_P_006,phosphorus,P,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Incorrect Method name; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_P_007,phosphorus,P,Muffle Furnace Dry Ashing,Combustion,,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.3",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2025-05-21T12:00:00Z,"Duplicate, incorrect analyte measurement",
+MANURE,L_MODV2_MANURE_P_008,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Duplicate, incorrect analyte measurement; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_P_009,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_P_010,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HClO4",Varies,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_P_011,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_P_012,phosphorus,P,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_P_013,phosphorus,P,Muffle Furnace Dry Ashing,Combustion,,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.2",,OFFICIAL,VALID,2025-05-21T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_P_014,phosphorus,P,Muffle Furnace Dry Ashing,Combustion,,As Received,Varies,Spectrophotometric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1c, M-5.3",,OFFICIAL,VALID,2025-05-21T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_P_WATER_EXTRACTABLE_001,"phosphorus, water extractable",P_WATER_EXTRACTABLE,Water,Water,100:1 V:S,v/m,60 min,ICP-OES,MEASURED,g/kg,g1kg-1,GM-PER-KiloGM,http://qudt.org/vocab/unit/GM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-6.1",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,Mass-per-mass/ppm harmonization to percent; was g/kg,
+MANURE,L_MODV2_MANURE_P_WATER_EXTRACTABLE_002,"phosphorus, water extractable",P_WATER_EXTRACTABLE,Water,Water,100:1 V:S,v/m,60 min,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-6.1",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,,Mass-per-mass/ppm harmonization to percent; was g/kg,
+MANURE,L_MODV2_MANURE_K_001,potassium,K,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_K_002,potassium,K,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_K_003,potassium,K,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_K_004,potassium,K,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_SOLUBLE_K_001,"potassium, soluble",SOLUBLE_K,Acetic Acid,2% Acetic Acid Extraction,,,,Spectrophotometric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SALMONELLA_001,salmonella,SALMONELLA,,,,,,Microbiological,,cfu/ml,cfu1ml-1,NUM-PER-MilliL,http://qudt.org/vocab/unit/NUM-PER-MilliL,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SE_001,selenium,SE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_SE_002,selenium,SE,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NA_001,sodium,NA,Nitric-Perchloric Acid Digestion,"HNO3, HClO4",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,AOAC International,AOAC 935.13A,,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Reagent abbreviation: ""Nitric acid, perchloric acid"" → ""HNO3, HClO4""",
+MANURE,L_MODV2_MANURE_NA_002,sodium,NA,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Analyte Measurement Method clarified: ICP → ICP-OES; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NA_003,sodium,NA,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_NA_004,sodium,NA,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_SOLIDS_FIXED_001,"solids, fixed",SOLIDS_FIXED,Muffle Furnace Dry Ashing,Total solid residue heated to constant weight at 550 C,,Dry Basis,Varies,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-1.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SOLIDS_001,"solids, total",SOLIDS,Oven Drying,"105 C, constant weight",,As Received,Varies,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Oven Drying alignment — method name standardized; temp/condition detail moved to reagent field.,
+MANURE,L_MODV2_MANURE_SOLIDS_002,"solids, total",SOLIDS,Oven Drying,105 C,,As Received,60 min,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-1.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-03T12:00:00Z,2026-04-03: Oven Drying alignment — method name standardized; temp/condition detail moved to reagent field.,
+MANURE,L_MODV2_MANURE_SOLIDS_003,"solids, total",SOLIDS,Oven Drying,Dry to constant weight at 80 C,,As Received,60 min,Gravimetric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SOLIDS_004,"solids, total",SOLIDS,Oven Drying,Dry to constant weight at 70 C,,As Received,60 min,Gravimetric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SOLID_VOLATILE_001,"solids, volatile",SOLID_VOLATILE,Muffle Furnace Dry Ashing,Total solid residue heated to constant weight at 550 C,,Dry Basis,Varies,Gravimetric,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-1.1",,OFFICIAL,VALID,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SO4_001,sulfate,SO4,Acetic Acid,2% Acetic Acid Extraction,,,,Spectrophotometric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_SO4S_001,sulfate-sulfur,SO4S,Acetic Acid,2% Acetic Acid Extraction,,,,Spectrophotometric,,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,,,,EXPERIMENTAL,RETIRED,2024-11-05T12:00:00Z,,,
+MANURE,L_MODV2_MANURE_S_001,sulfur,S,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Invalid, duplicate; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_S_002,sulfur,S,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_S_003,sulfur,S,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,VALID,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_S_004,sulfur,S,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Invalid Duplicate; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_S_005,sulfur,S,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,INVALID,2025-05-21T12:00:00Z,2026-04-02T12:00:00Z,"Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_ZN_001,zinc,ZN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_ZN_002,zinc,ZN,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,MilliGM-PER-KiloGM,http://qudt.org/vocab/unit/MilliGM-PER-KiloGM,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,SUPERSEDED,2024-11-05T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_ZN_003,zinc,ZN,Nitric Acid,HNO3 (concentrated),Varies,As Received,Varies,ICP-OES,MEASURED,mg/kg,mg1kg-1,,,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,SUPERSEDED,2025-05-21T12:00:00Z,2026-04-03T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, concentrated"" → ""HNO3 (concentrated)"" | 2026-04-03: Final audit fixes applied",
+MANURE,L_MODV2_MANURE_ZN_004,zinc,ZN,"Microwave-Assisted Acid Digestion, Open Vessel","HNO3, HCl, H2O2",Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Open Vessel"" → ""Microwave-Assisted Acid Digestion, Open Vessel""; Reagent abbreviation: ""Nitric acid, hydrochloric acid, peroxide"" → ""HNO3, HCl, H2O2""",
+MANURE,L_MODV2_MANURE_ZN_005,zinc,ZN,"Microwave-Assisted Acid Digestion, Closed Vessel",HNO3,Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1a, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Method name harmonized: ""Microwave Digestion Closed Vessel"" → ""Microwave-Assisted Acid Digestion, Closed Vessel""; Reagent abbreviation: ""Nitric acid"" → ""HNO3""",
+MANURE,L_MODV2_MANURE_ZN_006,zinc,ZN,Nitric Acid,HNO3 (concentrated),Varies,As Received,Varies,ICP-OES,MEASURED,%,prcnt,PERCENT,http://qudt.org/vocab/unit/PERCENT,MN-DA (Minnesota Department of Agriculture),"Recommended Methods of Manure Analysis, 2nd Edition, Methods M-5.1b, M-5.2",,OFFICIAL,CANDIDATE,2026-04-02T12:00:00Z,2026-04-02T12:00:00Z,"Mass-per-mass/ppm harmonization to percent; was mg/kg; Reagent abbreviation: ""Nitric acid, concentrated"" → ""HNO3 (concentrated)""",
diff --git a/Method Lists/Modus2 Manure Code Supersession.csv b/Method Lists/Modus2 Manure Code Supersession.csv
index 14c983c..e8d9f97 100644
--- a/Method Lists/Modus2 Manure Code Supersession.csv	
+++ b/Method Lists/Modus2 Manure Code Supersession.csv	
@@ -1,93 +1,130 @@
-Modus Manure Code (V1 & V2),V2 Manure Code (Supersedes to)
-L_MODV2_MANURE_P_001,L_MODV2_MANURE_P_009
-L_MODV2_MANURE_P_002,L_MODV2_MANURE_P_011
-L_MODV2_MANURE_P_004,L_MODV2_MANURE_P_013
-L_MODV2_MANURE_P_006,L_MODV2_MANURE_P_009
-L_MODV2_MANURE_P_007,L_MODV2_MANURE_P_013
-L_MODV2_MANURE_P_008,L_MODV2_MANURE_P_011
-L_MODV2_MANURE_S_001,L_MODV2_MANURE_S_005
-L_MODV2_MANURE_S_004,L_MODV2_MANURE_S_005
-L_MODV2_MANURE_TKN_001,L_MODV2_MANURE_TKN_006
-L_MODV2_MANURE_TKN_002,L_MODV2_MANURE_TKN_007
-L_MODV2_MANURE_TKN_003,L_MODV2_MANURE_TKN_008
-L_MODV2_MANURE_TKN_004,L_MODV2_MANURE_TN_001
-L_MODV2_MANURE_TKN_005,L_MODV2_MANURE_TN_002
-M-5DAYGERM,L_MODV2_MANURE_5DAYGERM_001
-M-7DVIGOR,L_MODV2_MANURE_7DAYVIGOR_001
-M-AS.11.05,L_MODV2_MANURE_AS_001
-M-ASH.09.01,L_MODV2_MANURE_SOLIDS_FIXED_001
-M-B.10.05,L_MODV2_MANURE_B_001
-M-B.15.08,L_MODV2_MANURE_B_002
-M-BD.00.01,L_MODV2_MANURE_BD_001
-M-C:N.04.06,L_MODV2_MANURE_CNRATIO_001
-M-CA.10.05,L_MODV2_MANURE_CA_001
-M-CA.11.05,L_MODV2_MANURE_CA_002
-M-CA.15.08,L_MODV2_MANURE_CA_003
-M-CD.11.05,L_MODV2_MANURE_CD_001
-M-CL.00.07,L_MODV2_MANURE_CL_001
-M-CL.13.05,L_MODV2_MANURE_CL_005
-M-CO.11.05,L_MODV2_MANURE_CO_001
-M-COND,L_MODV2_MANURE_EC_001
-M-CR.11.05,L_MODV2_MANURE_CR_001
-M-CU.10.05,L_MODV2_MANURE_CU_001
-M-CU.11.05,L_MODV2_MANURE_CU_002
-M-CU.15.08,L_MODV2_MANURE_CU_003
-M-DM.14.01,L_MODV2_MANURE_SOLIDS_001
-M-EC.01.04,L_MODV2_MANURE_EC_003
-M-ECOLI.00.03,L_MODV2_MANURE_ECOLI_001
-M-FCOL.00.03,L_MODV2_MANURE_COLIFORM_FECAL_001
-M-FE.10.05,L_MODV2_MANURE_FE_001
-M-FE.11.05,L_MODV2_MANURE_FE_002
-M-FE.15.08,L_MODV2_MANURE_FE_003
-M-HA.00.01,L_MODV2_MANURE_HUMICACID_001
-M-HG.03.05,L_MODV2_MANURE_HG_001
-M-K.15.08,L_MODV2_MANURE_K_002
-M-MG.10.05,L_MODV2_MANURE_MG_001
-M-MG.11.05,L_MODV2_MANURE_MG_002
-M-MG.15.08,L_MODV2_MANURE_MG_003
-M-MI.00.04,L_MODV2_MANURE_MATURITYINDEX_001
-M-MMM.00.01,L_MODV2_MANURE_MMM_001
-M-MN.10.05,L_MODV2_MANURE_MN_001
-M-MN.11.05,L_MODV2_MANURE_MN_002
-M-MN.15.08,L_MODV2_MANURE_MN_003
-M-MO.11.05,L_MODV2_MANURE_MO_001
-M-MOIST.00.01,L_MODV2_MANURE_GWC_001
-M-NA.10.05,L_MODV2_MANURE_NA_001
-M-NA.11.05,L_MODV2_MANURE_NA_002
-M-NA.15.08,L_MODV2_MANURE_NA_003
-M-NH4.12.02,L_MODV2_MANURE_NH3N_003
-M-NH4.12.05,L_MODV2_MANURE_NH3N_001
-M-NH4.12.07,L_MODV2_MANURE_NH3N_002
-M-NH4.13.05,L_MODV2_MANURE_NH4N_006
-M-NI.11.05,L_MODV2_MANURE_NI_001
-M-NO3.06.05,L_MODV2_MANURE_NO3N_001
-M-NO3N.06.02,L_MODV2_MANURE_NO3N_004
-M-NO3N.13.05,L_MODV2_MANURE_NO3N_005
-M-OM.08.01,L_MODV2_MANURE_OM_001
-M-P.15.08,L_MODV2_MANURE_P_005
-M-P2O5.02.05,L_MODV2_MANURE_PO4_001
-M-P2O5P.02.05,L_MODV2_MANURE_PO4P_001
-M-PB.11.05,L_MODV2_MANURE_PB_001
-M-PH.01.04,L_MODV2_MANURE_PH_001
-M-S.11.05,L_MODV2_MANURE_S_001
-M-S.15.08,L_MODV2_MANURE_S_002
-M-SAL.00.03,L_MODV2_MANURE_SALMONELLA_001
-M-SE.11.05,L_MODV2_MANURE_SE_001
-M-SO4.02.05,L_MODV2_MANURE_SO4_001
-M-SO4S.02.05,L_MODV2_MANURE_SO4S_001
-M-SOLK.02.05,L_MODV2_MANURE_SOLUBLE_K_001
-M-TC,L_MODV2_MANURE_TC_001
-M-TCOL.00.03,L_MODV2_MANURE_COLIFORM_TOTAL_001
-M-TK.10.06,L_MODV2_MANURE_K_001
-M-TK.11.05,L_MODV2_MANURE_K_004
-M-TKN.07.07,L_MODV2_MANURE_TKN_001
-M-TN.04.06,L_MODV2_MANURE_TKN_004
-M-TOC.05.07,L_MODV2_MANURE_TOC_001
-M-TP.10.05,L_MODV2_MANURE_P_001
-M-TP.11.05,L_MODV2_MANURE_P_008
-M-TS.00.01,L_MODV2_MANURE_SOLIDS_002
-M-WINSOLN,L_MODV2_MANURE_NWI_001
-M-WSOLN,L_MODV2_MANURE_NWS_001
-M-ZN.10.05,L_MODV2_MANURE_ZN_002
-M-ZN.11.05,L_MODV2_MANURE_ZN_001
-M-ZN.15.08,L_MODV2_MANURE_S_004
+Modus Manure Code (V1 & V2),V2 Manure Code (Supersedes to)
+L_MODV2_MANURE_P_001,L_MODV2_MANURE_P_009
+L_MODV2_MANURE_P_002,L_MODV2_MANURE_P_011
+L_MODV2_MANURE_P_004,L_MODV2_MANURE_P_013
+L_MODV2_MANURE_P_006,L_MODV2_MANURE_P_009
+L_MODV2_MANURE_P_007,L_MODV2_MANURE_P_013
+L_MODV2_MANURE_P_008,L_MODV2_MANURE_P_011
+L_MODV2_MANURE_S_001,L_MODV2_MANURE_S_002
+L_MODV2_MANURE_S_004,L_MODV2_MANURE_S_002
+L_MODV2_MANURE_TKN_001,L_MODV2_MANURE_TKN_006
+L_MODV2_MANURE_TKN_002,L_MODV2_MANURE_TKN_007
+L_MODV2_MANURE_TKN_003,L_MODV2_MANURE_TKN_008
+L_MODV2_MANURE_TKN_004,L_MODV2_MANURE_TN_001
+L_MODV2_MANURE_TKN_005,L_MODV2_MANURE_TN_002
+M-5DAYGERM,L_MODV2_MANURE_5DAYGERM_001
+M-7DVIGOR,L_MODV2_MANURE_7DAYVIGOR_001
+M-AS.11.05,L_MODV2_MANURE_AS_001
+M-ASH.09.01,L_MODV2_MANURE_SOLIDS_FIXED_001
+M-B.10.05,L_MODV2_MANURE_B_001
+M-B.15.08,L_MODV2_MANURE_B_002
+M-BD.00.01,L_MODV2_MANURE_BD_001
+M-C:N.04.06,L_MODV2_MANURE_CNRATIO_001
+M-CA.10.05,L_MODV2_MANURE_CA_001
+M-CA.11.05,L_MODV2_MANURE_CA_002
+M-CA.15.08,L_MODV2_MANURE_CA_003
+M-CD.11.05,L_MODV2_MANURE_CD_001
+M-CL.00.07,L_MODV2_MANURE_CL_001
+M-CL.13.05,L_MODV2_MANURE_CL_005
+M-CO.11.05,L_MODV2_MANURE_CO_001
+M-COND,L_MODV2_MANURE_EC_001
+M-CR.11.05,L_MODV2_MANURE_CR_001
+M-CU.10.05,L_MODV2_MANURE_CU_001
+M-CU.11.05,L_MODV2_MANURE_CU_002
+M-CU.15.08,L_MODV2_MANURE_CU_003
+M-DM.14.01,L_MODV2_MANURE_SOLIDS_001
+M-EC.01.04,L_MODV2_MANURE_EC_003
+M-ECOLI.00.03,L_MODV2_MANURE_ECOLI_001
+M-FCOL.00.03,L_MODV2_MANURE_COLIFORM_FECAL_001
+M-FE.10.05,L_MODV2_MANURE_FE_001
+M-FE.11.05,L_MODV2_MANURE_FE_002
+M-FE.15.08,L_MODV2_MANURE_FE_003
+M-HA.00.01,L_MODV2_MANURE_HUMICACID_001
+M-HG.03.05,L_MODV2_MANURE_HG_001
+M-K.15.08,L_MODV2_MANURE_K_002
+M-MG.10.05,L_MODV2_MANURE_MG_001
+M-MG.11.05,L_MODV2_MANURE_MG_002
+M-MG.15.08,L_MODV2_MANURE_MG_003
+M-MI.00.04,L_MODV2_MANURE_MATURITYINDEX_001
+M-MMM.00.01,L_MODV2_MANURE_MMM_001
+M-MN.10.05,L_MODV2_MANURE_MN_001
+M-MN.11.05,L_MODV2_MANURE_MN_002
+M-MN.15.08,L_MODV2_MANURE_MN_003
+M-MO.11.05,L_MODV2_MANURE_MO_001
+M-MOIST.00.01,L_MODV2_MANURE_GWC_001
+M-NA.10.05,L_MODV2_MANURE_NA_001
+M-NA.11.05,L_MODV2_MANURE_NA_002
+M-NA.15.08,L_MODV2_MANURE_NA_003
+M-NH4.12.02,L_MODV2_MANURE_NH3N_003
+M-NH4.12.05,L_MODV2_MANURE_NH3N_001
+M-NH4.12.07,L_MODV2_MANURE_NH3N_002
+M-NH4.13.05,L_MODV2_MANURE_NH4N_006
+M-NI.11.05,L_MODV2_MANURE_NI_001
+M-NO3.06.05,L_MODV2_MANURE_NO3N_001
+M-NO3N.06.02,L_MODV2_MANURE_NO3N_004
+M-NO3N.13.05,L_MODV2_MANURE_NO3N_005
+M-OM.08.01,L_MODV2_MANURE_OM_001
+M-P.15.08,L_MODV2_MANURE_P_005
+M-P2O5.02.05,L_MODV2_MANURE_PO4_001
+M-P2O5P.02.05,L_MODV2_MANURE_PO4P_001
+M-PB.11.05,L_MODV2_MANURE_PB_001
+M-PH.01.04,L_MODV2_MANURE_PH_001
+M-S.11.05,L_MODV2_MANURE_S_001
+M-S.15.08,L_MODV2_MANURE_S_002
+M-SAL.00.03,L_MODV2_MANURE_SALMONELLA_001
+M-SE.11.05,L_MODV2_MANURE_SE_001
+M-SO4.02.05,L_MODV2_MANURE_SO4_001
+M-SO4S.02.05,L_MODV2_MANURE_SO4S_001
+M-SOLK.02.05,L_MODV2_MANURE_SOLUBLE_K_001
+M-TC,L_MODV2_MANURE_TC_001
+M-TCOL.00.03,L_MODV2_MANURE_COLIFORM_TOTAL_001
+M-TK.10.06,L_MODV2_MANURE_K_001
+M-TK.11.05,L_MODV2_MANURE_K_004
+M-TKN.07.07,L_MODV2_MANURE_TKN_001
+M-TN.04.06,L_MODV2_MANURE_TKN_004
+M-TOC.05.07,L_MODV2_MANURE_TOC_001
+M-TP.10.05,L_MODV2_MANURE_P_001
+M-TP.11.05,L_MODV2_MANURE_P_008
+M-TS.00.01,L_MODV2_MANURE_SOLIDS_002
+M-WINSOLN,L_MODV2_MANURE_NWI_001
+M-WSOLN,L_MODV2_MANURE_NWS_001
+M-ZN.10.05,L_MODV2_MANURE_ZN_002
+M-ZN.11.05,L_MODV2_MANURE_ZN_001
+M-ZN.15.08,L_MODV2_MANURE_ZN_003
+L_MODV2_MANURE_AS_001,L_MODV2_MANURE_AS_002
+L_MODV2_MANURE_B_001,L_MODV2_MANURE_B_004
+L_MODV2_MANURE_B_002,L_MODV2_MANURE_B_005
+L_MODV2_MANURE_B_003,L_MODV2_MANURE_B_006
+L_MODV2_MANURE_CD_001,L_MODV2_MANURE_CD_002
+L_MODV2_MANURE_CL_001,L_MODV2_MANURE_CL_008
+L_MODV2_MANURE_CL_002,L_MODV2_MANURE_CL_008
+L_MODV2_MANURE_CL_003,L_MODV2_MANURE_CL_010
+L_MODV2_MANURE_CL_004,L_MODV2_MANURE_CL_010
+L_MODV2_MANURE_CL_005,L_MODV2_MANURE_CL_012
+L_MODV2_MANURE_CL_006,L_MODV2_MANURE_CL_012
+L_MODV2_MANURE_CO_001,L_MODV2_MANURE_CO_002
+L_MODV2_MANURE_CR_001,L_MODV2_MANURE_CR_003
+L_MODV2_MANURE_CR_002,L_MODV2_MANURE_CR_004
+L_MODV2_MANURE_CU_001,L_MODV2_MANURE_CU_005
+L_MODV2_MANURE_CU_002,L_MODV2_MANURE_CU_007
+L_MODV2_MANURE_CU_003,L_MODV2_MANURE_CU_007
+L_MODV2_MANURE_CU_004,L_MODV2_MANURE_CU_008
+L_MODV2_MANURE_FE_001,L_MODV2_MANURE_FE_005
+L_MODV2_MANURE_FE_002,L_MODV2_MANURE_FE_007
+L_MODV2_MANURE_FE_003,L_MODV2_MANURE_FE_007
+L_MODV2_MANURE_FE_004,L_MODV2_MANURE_FE_008
+L_MODV2_MANURE_MN_001,L_MODV2_MANURE_MN_005
+L_MODV2_MANURE_MN_002,L_MODV2_MANURE_MN_007
+L_MODV2_MANURE_MN_003,L_MODV2_MANURE_MN_007
+L_MODV2_MANURE_MN_004,L_MODV2_MANURE_MN_008
+L_MODV2_MANURE_MO_001,L_MODV2_MANURE_MO_002
+L_MODV2_MANURE_NI_001,L_MODV2_MANURE_NI_002
+L_MODV2_MANURE_P_WATER_EXTRACTABLE_001,L_MODV2_MANURE_P_WATER_EXTRACTABLE_002
+L_MODV2_MANURE_PB_001,L_MODV2_MANURE_PB_002
+L_MODV2_MANURE_SE_001,L_MODV2_MANURE_SE_002
+L_MODV2_MANURE_ZN_001,L_MODV2_MANURE_ZN_004
+L_MODV2_MANURE_ZN_002,L_MODV2_MANURE_ZN_005
+L_MODV2_MANURE_ZN_003,L_MODV2_MANURE_ZN_006
+L_MODV2_MANURE_TKN_006,L_MODV2_MANURE_TN_003
+L_MODV2_MANURE_TKN_007,L_MODV2_MANURE_TN_004
+L_MODV2_MANURE_TKN_008,L_MODV2_MANURE_TN_005
diff --git a/Method Lists/Modus2 Manure Code Supersession.xlsx b/Method Lists/Modus2 Manure Code Supersession.xlsx
index 4022b8a..829114d 100644
Binary files a/Method Lists/Modus2 Manure Code Supersession.xlsx and b/Method Lists/Modus2 Manure Code Supersession.xlsx differ
diff --git a/Method Lists/Modus2 Soil Code Supersession.csv b/Method Lists/Modus2 Soil Code Supersession.csv
index 5ea971c..0ed5825 100644
--- a/Method Lists/Modus2 Soil Code Supersession.csv	
+++ b/Method Lists/Modus2 Soil Code Supersession.csv	
@@ -1,613 +1,1032 @@
-Modus Code (V1 & V2),V2 Code (Supersedes to)
-L_MODV2_SOIL_CO2RESP_001,L_MODV2_SOIL_CMP_014
-L_MODV2_SOIL_CO2RESP_002,L_MODV2_SOIL_CMP_015
-L_MODV2_SOIL_CO2RESP_003,L_MODV2_SOIL_CMP_016
-L_MODV2_SOIL_STCM_001,L_MODV2_SOIL_CMP_001
-L_MODV2_SOIL_STCM_002,L_MODV2_SOIL_CMP_002
-L_MODV2_SOIL_STCM_003,L_MODV2_SOIL_CMP_003
-L_MODV2_SOIL_STCM_004,L_MODV2_SOIL_CMP_004
-L_MODV2_SOIL_STCM_005,L_MODV2_SOIL_CMP_005
-L_MODV2_SOIL_STCM_006,L_MODV2_SOIL_CMP_006
-L_MODV2_SOIL_STCM_007,L_MODV2_SOIL_CMP_007
-L_MODV2_SOIL_STCM_008,L_MODV2_SOIL_CMP_008
-L_MODV2_SOIL_STCM_009,L_MODV2_SOIL_CMP_009
-L_MODV2_SOIL_STCM_010,L_MODV2_SOIL_CMP_010
-L_MODV2_SOIL_STCM_011,L_MODV2_SOIL_CMP_011
-L_MODV2_SOIL_STCM_012,L_MODV2_SOIL_CMP_012
-L_MODV2_SOIL_STCM_013,L_MODV2_SOIL_CMP_013
-S-Acidity.19,L_MODV2_SOIL_ACIDT_002
-S-SARJ-SP.00,L_MODV2_SOIL_ASAR_001
-S-AL-BACL2.23,L_MODV2_SOIL_AL_001
-S-AL-OX.23,L_MODV2_SOIL_AL_002
-S-TAL-RAR.23,L_MODV2_SOIL_AL_003
-S-AL-CACL2.23,L_MODV2_SOIL_AL_004
-S-AL.19,L_MODV2_SOIL_AL_005
-S-AL-DTPA-SORB.05,L_MODV2_SOIL_AL_006
-S-AL-H3A.04,L_MODV2_SOIL_AL_010
-S-AL-RES.04,L_MODV2_SOIL_AL_011
-S-AL-M3.05,L_MODV2_SOIL_AL_012
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-S-TKN.18,L_MODV2_SOIL_TKN_004
-S-TN.01.05,L_MODV2_SOIL_TKN_005
-S-TN.09,L_MODV2_SOIL_TKN_006
-S-TN.18,L_MODV2_SOIL_TKN_007
-S-TKN.19,L_MODV2_SOIL_TN_001
-S-TN.16,L_MODV2_SOIL_TN_002
-S-TN-W.01,L_MODV2_SOIL_TN_003
-S-TN-RES.01,L_MODV2_SOIL_TN_004
-S-TIN.19,L_MODV2_SOIL_TIN_001
-S-XX.00,L_MODV2_SOIL_NULL_001
-S-TOC.16,L_MODV2_SOIL_OC_001
-S-OC-WB.01,L_MODV2_SOIL_OC_002
-S-OC-WB.12,L_MODV2_SOIL_OC_004
-S-TOC-W1:10.16,L_MODV2_SOIL_OC_005
-S-TOC.12.09,L_MODV2_SOIL_TOC_001
-S-OM.19,L_MODV2_SOIL_OM_001
-S-SOM-Color.19,L_MODV2_SOIL_OM_002
-S-OM-DUMAS.16,L_MODV2_SOIL_OM_003
-S-SOM-LOI.15,L_MODV2_SOIL_OM_004
-S-SOM-WB.01.09,L_MODV2_SOIL_OM_005
-S-SOM-WB.12.09,L_MODV2_SOIL_OM_006
-S-ON.19,L_MODV2_SOIL_ON_001
-S-OTHER.19,L_MODV2_SOIL_OTHER_001
-S-P:Cu-M3.19,L_MODV2_SOIL_PCURATIO_001
-S-P:Cu.19,L_MODV2_SOIL_PCURATIO_002
-S-P:Mn-M3.19,L_MODV2_SOIL_PMNRATIO_001
-S-P:Mn.19,L_MODV2_SOIL_PMNRATIO_002
-S-P:S-M3.19,L_MODV2_SOIL_PSRATIO_001
-S-P:S.19,L_MODV2_SOIL_PSRATIO_002
-S-P:Zn-M3.19,L_MODV2_SOIL_PZNRATIO_001
-S-P:Zn.19,L_MODV2_SOIL_PZNRATIO_002
-S-AC-KMNO4.01,L_MODV2_SOIL_MNO4OXC_001
-S-PH-1:1.02.08,L_MODV2_SOIL_PH_002
-S-PH-1:2.02.08,L_MODV2_SOIL_PH_003
-S-PH-1:1.02.07,L_MODV2_SOIL_PH_005
-S-PH-1:2.02.07,L_MODV2_SOIL_PH_006
-S-PH-1:2.5.02.07,L_MODV2_SOIL_PH_007
-S-pH-1:5H2O.02,L_MODV2_SOIL_PH_008
-S-PH-1:1KCL.02,L_MODV2_SOIL_PH_010
-S-PH-1:5.02.08,L_MODV2_SOIL_PH_011
-S-pH-1:5KCL.02,L_MODV2_SOIL_PH_012
-S-PH-SP.02,L_MODV2_SOIL_PH_013
-S-P-AA-NH4AC.04,L_MODV2_SOIL_P_001
-S-P-AR.23,L_MODV2_SOIL_P_003
-S-P-B1-1:10.01.03,L_MODV2_SOIL_P_004
-S-P-B1-1:7.01.03,L_MODV2_SOIL_P_005
-S-P-B2-1:10.01.03,L_MODV2_SOIL_P_006
-S-P-B2-1:7.01.03,L_MODV2_SOIL_P_007
-S-P-BK.23,L_MODV2_SOIL_P_008
-S-P-LACTATE.01,L_MODV2_SOIL_P_009
-S-P-CACL2.01,L_MODV2_SOIL_P_010
-S-P-M3BRAYP1.19,L_MODV2_SOIL_P_011
-S-P-CALD.01.03,L_MODV2_SOIL_P_013
-S-P-W1:1.01,L_MODV2_SOIL_P_014
-S-P-W1:5.01.03,L_MODV2_SOIL_P_015
-S-P-W10:1.04,L_MODV2_SOIL_P_016
-S-P-W20:1.04,L_MODV2_SOIL_P_017
-S-P-DGT.01,L_MODV2_SOIL_P_018
-S-P-EPA3050.04,L_MODV2_SOIL_P_019
-S-P-H3A1.01.04,L_MODV2_SOIL_P_020
-S-P-RES.01,L_MODV2_SOIL_P_021
-S-P-RES.04,L_MODV2_SOIL_P_022
-S-P-KEL.01.03,L_MODV2_SOIL_P_023
-S-P-MKEL.01.03,L_MODV2_SOIL_P_024
-S-P-LANC.04,L_MODV2_SOIL_P_025
-S-P-M1.04,L_MODV2_SOIL_P_026
-S-P-M2.04,L_MODV2_SOIL_P_029
-S-P-M3.01.03,L_MODV2_SOIL_P_032
-S-P-M3.04,L_MODV2_SOIL_P_033
-S-P-MOR.01.03,L_MODV2_SOIL_P_035
-S-P-MMOR.01.03,L_MODV2_SOIL_P_036
-S-P-NA.04,L_MODV2_SOIL_P_038
-S-P-PRS.04,L_MODV2_SOIL_P_039
-S-P-SP.04,L_MODV2_SOIL_P_044
-S-P-BIC.01.03,L_MODV2_SOIL_P_045
-S-P-H2SO4.01,L_MODV2_SOIL_P_046
-S-P-TRG.01.03,L_MODV2_SOIL_P_047
-S-PBI.19,L_MODV2_SOIL_PBUFINDEX_001
-S-PBI-BIC.19,L_MODV2_SOIL_PBUFINDEX_002
-S-PBI-COL.19,L_MODV2_SOIL_PBUFINDEX_003
-S-PBI-CACL2.01,L_MODV2_SOIL_PBUFINDEX_004
-S-PERI.19,L_MODV2_SOIL_PERINDEX_001
-S-PFF-M3.04,L_MODV2_SOIL_PFF_001
-S-P-INDX,L_MODV2_SOIL_PINDEX_001
-S-P-INDX.19,L_MODV2_SOIL_PINDEX_002
-S-P-NCINDX,L_MODV2_SOIL_PINDEX_003
-S-PR-M3.23,L_MODV2_SOIL_PRATIO_001
-S-PRI-KCL.01,L_MODV2_SOIL_PRI_001
-S-PSI.M3.19,L_MODV2_SOIL_PSINDEX_001
-S-PSI.M3O.19,L_MODV2_SOIL_PSINDEX_002
-S-TP-H2SO4.01,L_MODV2_SOIL_TP_001
-S-TP-NA.04,L_MODV2_SOIL_TP_002
-S-K-PWAA.23,L_MODV2_SOIL_K_001
-S-K-AA.23,L_MODV2_SOIL_K_002
-S-K-NH4CL.23,L_MODV2_SOIL_K_004
-S-K-PNA4CL.23,L_MODV2_SOIL_K_005
-S-K-BACL2.23,L_MODV2_SOIL_K_006
-S-K-B1-1:10.05,L_MODV2_SOIL_K_007
-S-K-COL.05,L_MODV2_SOIL_K_014
-S-K-W1:1.05,L_MODV2_SOIL_K_016
-S-K-W20:1.04,L_MODV2_SOIL_K_017
-S-K-H3A1.01.04,L_MODV2_SOIL_K_019
-S-K-HCL.05,L_MODV2_SOIL_K_020
-S-K-HCL.23,L_MODV2_SOIL_K_021
-S-K-RES.04,L_MODV2_SOIL_K_023
-S-K-KEL.06,L_MODV2_SOIL_K_024
-S-K-MKEL.06,L_MODV2_SOIL_K_026
-S-K-LANC.04,L_MODV2_SOIL_K_027
-S-K-M3.20,L_MODV2_SOIL_K_028
-S-K-M1.05,L_MODV2_SOIL_K_029
-S-K-M2.05,L_MODV2_SOIL_K_030
-S-K-M3.05,L_MODV2_SOIL_K_031
-S-K-MOR.05,L_MODV2_SOIL_K_033
-S-K-MMOR.05,L_MODV2_SOIL_K_034
-S-K-HNO3.07,L_MODV2_SOIL_K_035
-S-K-HNO3.23,L_MODV2_SOIL_K_036
-S-K-NA.04,L_MODV2_SOIL_K_037
-S-K-PRS.04,L_MODV2_SOIL_K_038
-S-K-SP.05,L_MODV2_SOIL_K_042
-S-K-BIC.06,L_MODV2_SOIL_K_043
-S-K-TRG.06,L_MODV2_SOIL_K_045
-S-K-W5:1.04,L_MODV2_SOIL_K_047
-S-K.19,L_MODV2_SOIL_K_048
-S-K-EPA3050.04,L_MODV2_SOIL_K_050
-S-KFF-M3.04,L_MODV2_SOIL_KFF_001
-S-K-INDX.19,L_MODV2_SOIL_PINDEX_001
-S-K-NCINDX,L_MODV2_SOIL_PINDEX_002
-S-TKP.01,L_MODV2_SOIL_TK_002
-S-PMN.01.0,L_MODV2_SOIL_POTMN_001
-S-POXC.01.0,L_MODV2_SOIL_POTOXC_001
-S-RZM.00,L_MODV2_SOIL_RZM_001
-S-SAND-SV.19,L_MODV2_SOIL_SAND_001
-S-SAND.22,L_MODV2_SOIL_SAND_002
-S-SAND-SED.10,L_MODV2_SOIL_SAND_003
-S-SAND-SED.11,L_MODV2_SOIL_SAND_004
-S-SANDC.BAL.19,L_MODV2_SOIL_SANDC_001
-S-SANDC.HYDRO.19,L_MODV2_SOIL_SANDC_002
-S-SANDC-SV.19,L_MODV2_SOIL_SANDC_003
-S-SANDF.DAL.19,L_MODV2_SOIL_SANDF_001
-S-SANDF-HYDRO.19,L_MODV2_SOIL_SANDF_002
-S-SANDF-SV.19,L_MODV2_SOIL_SANDF_003
-S-SP%.19,L_MODV2_SOIL_SATPP_001
-S-SE-AR.07,L_MODV2_SOIL_SE_001
-S-SE-EPA3050.04,L_MODV2_SOIL_SE_003
-S-SI-AA.04,L_MODV2_SOIL_SI_001
-S-SI-CACL2.01,L_MODV2_SOIL_SI_003
-S-SI-KCL.04,L_MODV2_SOIL_SI_004
-S-SI-SP.04,L_MODV2_SOIL_SI_005
-S-SI-H2SO4.01,L_MODV2_SOIL_SI_006
-S-SILT-SV.19,L_MODV2_SOIL_SILT_001
-S-SILT.22,L_MODV2_SOIL_SILT_002
-S-SILT-SED.10,L_MODV2_SOIL_SILT_003
-S-SILT-SED.11,L_MODV2_SOIL_SILT_004
-S-SI+C-SV,L_MODV2_SOIL_SILTCLAY_001
-S-AG-EPA3050.04,L_MODV2_SOIL_AG_001
-S-Slaking.24,L_MODV2_SOIL_SLAKING_001
-S-NA-NH4AC.05,L_MODV2_SOIL_NA_001
-S-NA-NH4CL.23,L_MODV2_SOIL_NA_002
-S-NA-PNA4CL.23,L_MODV2_SOIL_NA_003
-S-NA-BACL2.23,L_MODV2_SOIL_NA_004
-S-NA-EPA3050.04,L_MODV2_SOIL_NA_006
-S-NA-EPA6010B.00,L_MODV2_SOIL_NA_008
-S-NA-H3A1.01.04,L_MODV2_SOIL_NA_009
-S-NA-LANC.04,L_MODV2_SOIL_NA_010
-S-NA-M1.05,L_MODV2_SOIL_NA_011
-S-NA-M2.05,L_MODV2_SOIL_NA_012
-S-NA-M3.05,L_MODV2_SOIL_NA_013
-S-NA-NA.04,L_MODV2_SOIL_NA_015
-S-NA-PRS.04,L_MODV2_SOIL_NA_016
-S-NA-KCL-01.05,L_MODV2_SOIL_NA_017
-S-NA-RES.04,L_MODV2_SOIL_NA_018
-S-NA-SP.05,L_MODV2_SOIL_NA_019
-S-NA-W:1:1.05,L_MODV2_SOIL_NA_020
-S-NA-W20:1.04,L_MODV2_SOIL_NA_021
-S-NA-W5:1.12,L_MODV2_SOIL_NA_022
-S-NA-W5:1.23,L_MODV2_SOIL_NA_023
-S-NA.19,L_MODV2_SOIL_NA_024
-S-SAR-AA.19,L_MODV2_SOIL_SAR_001
-S-SAR-W5:1.19,L_MODV2_SOIL_SAR_002
-S-SAR-SP.00,L_MODV2_SOIL_SAR_003
-S-SOLIDS.19,L_MODV2_SOIL_SOLIDS_001
-S-SS.19,L_MODV2_SOIL_SS_001
-S-SS-NCINDX.19,L_MODV2_SOIL_SSINDEX_001
-S-SR-EPA3050.04,L_MODV2_SOIL_SR_001
-S-SO4-1:5.13,L_MODV2_SOIL_SO4S_001
-S-S-W5:1.04,L_MODV2_SOIL_SO4S_003
-S-SO4-W1:1.13,L_MODV2_SOIL_SO4S_004
-S-SO4-EPA300.04,L_MODV2_SOIL_SO4S_005
-S-SO4-SP.08,L_MODV2_SOIL_SO4S_006
-S-SO4-SP.13,L_MODV2_SOIL_SO4S_007
-S-S-NH4AC.04,L_MODV2_SOIL_S_001
-S-S-NH4AC.05,L_MODV2_SOIL_S_002
-S-S-NH4AC.23,L_MODV2_SOIL_S_003
-S-S-CACL.05,L_MODV2_SOIL_S_004
-S-SO4-CaCl.04.08,L_MODV2_SOIL_S_005
-S-SO4-1:5.05,L_MODV2_SOIL_S_007
-S-S.16,L_MODV2_SOIL_S_009
-S-SO4-1:5H2O.23,L_MODV2_SOIL_S_010
-S-SO4-W1:1.04,L_MODV2_SOIL_S_011
-S-S-W1:1.04,L_MODV2_SOIL_S_012
-S-S-W20:1.04,L_MODV2_SOIL_S_013
-S-S-DTPA-SORB.05,L_MODV2_SOIL_S_015
-S-S-EPA6010B.00,L_MODV2_SOIL_S_016
-S-S-EPA3050.04,L_MODV2_SOIL_S_017
-S-S-H3A.04,L_MODV2_SOIL_S_020
-S-SO4-RES.04,L_MODV2_SOIL_S_022
-S-S-RES.04,L_MODV2_SOIL_S_024
-S-S-LANC.04,L_MODV2_SOIL_S_025
-S-S-M3.05,L_MODV2_SOIL_S_026
-S-S-MMOR.05,L_MODV2_SOIL_S_028
-S-S-NA.04,L_MODV2_SOIL_S_030
-S-SO4-PRS.04,L_MODV2_SOIL_S_031
-S-S-0.25MKCL.23,L_MODV2_SOIL_S_034
-S-S-KCL.05,L_MODV2_SOIL_S_035
-S-SO4-SP.04,L_MODV2_SOIL_S_036
-S-S-NCINDX,L_MODV2_SOIL_SINDEX_001
-S-TEXTURE.19,L_MODV2_SOIL_TEXTURE_001
-S-TEXTURE.01,L_MODV2_SOIL_TEXTURE_002
-S-TEXTURE.22,L_MODV2_SOIL_TEXTURE_003
-S-SN-EPA3050.04,L_MODV2_SOIL_SN_001
-S-H-MEAS.12,L_MODV2_SOIL_TITACIDT_001
-S-TC:TN.19,L_MODV2_SOIL_TCTN_001
-S-TOC:TN.19,L_MODV2_SOIL_TOCTN_001
-S-UNKNOWN.00,L_MODV2_SOIL_UNKNOWN_001
-S-UREA-NH4.01,L_MODV2_SOIL_UREA_001
-S-ZN-DTPA.05,L_MODV2_SOIL_ZN_002
-S-ZN-DTPA-SORB.05,L_MODV2_SOIL_ZN_003
-S-ZN-EDTA.05,L_MODV2_SOIL_ZN_004
-S-ZN-EPA3050.04,L_MODV2_SOIL_ZN_005
-S-ZN-H3A1.01.04,L_MODV2_SOIL_ZN_008
-S-ZN-HCL.05,L_MODV2_SOIL_ZN_009
-S-ZN-RES.04,L_MODV2_SOIL_ZN_010
-S-ZN-LANC.04,L_MODV2_SOIL_ZN_011
-S-ZN-M1.05,L_MODV2_SOIL_ZN_012
-S-ZN-M2.05,L_MODV2_SOIL_ZN_013
-S-ZN-M3DTPA.19,L_MODV2_SOIL_ZN_014
-S-ZN-M3.05,L_MODV2_SOIL_ZN_015
-S-ZN-NA.04,L_MODV2_SOIL_ZN_019
-S-ZN-PRS.04,L_MODV2_SOIL_ZN_020
-S-ZN-SP.04,L_MODV2_SOIL_ZN_024
-S-ZN-NCINDX,L_MODV2_SOIL_ZINDEX_001
-S-Zn:Cu-M3.19,L_MODV2_SOIL_ZNCURATIO_001
-S-Zn:Cu.19,L_MODV2_SOIL_ZNCURATIO_002
-S-AL-KCL.05,L_MODV2_SOIL_AL_018
-S-NH4N-KCL.01,L_MODV2_SOIL_NH4N_005
-S-CACO3-1NHCL.24,L_MODV2_SOIL_CO3QUAL_001
-S-CEC-BA.05,L_MODV2_SOIL_CEC_005
-S-CL-W.01,L_MODV2_SOIL_CL_005
-S-MG-AA.23,L_MODV2_SOIL_MG_002
-S-MOIST-GRAVAR.15,L_MODV2_SOIL_GWC_15BAR_001
-S-ASH-LOI.15,L_MODV2_SOIL_OM_004
-S-P-COL.01,L_MODV2_SOIL_P_013
-S-P-W1:1.01.03,L_MODV2_SOIL_P_014
-S-P-BIC.04,L_MODV2_SOIL_P_045
-S-K-NH4AC.05,L_MODV2_SOIL_K_002
-S-K-W20:1.04,L_MODV2_SOIL_K_017
-S-K-M3.21,L_MODV2_SOIL_K_028
-S-K-M3.06,L_MODV2_SOIL_K_031
-S-NA-AA.23,L_MODV2_SOIL_NA_001
-L_MODV2_SOIL_TKN_001,L_MODV2_SOIL_TKN_008
-L_MODV2_SOIL_TKN_002,L_MODV2_SOIL_TKN_009
-L_MODV2_SOIL_TKN_003,L_MODV2_SOIL_TKN_010
-L_MODV2_SOIL_TKN_004,L_MODV2_SOIL_TKN_011
-L_MODV2_SOIL_TKN_005,L_MODV2_SOIL_TKN_012
-L_MODV2_SOIL_TKN_006,L_MODV2_SOIL_TKN_013
-L_MODV2_SOIL_TKN_007,L_MODV2_SOIL_TKN_014
+Modus Code (V1 & V2),V2 Code (Supersedes to)
+S-Acidity.19,L_MODV2_SOIL_ACIDT_002
+S-AG-EPA3050.04,L_MODV2_SOIL_AG_001
+S-AL-BACL2.23,L_MODV2_SOIL_AL_001
+S-AL-OX.23,L_MODV2_SOIL_AL_002
+S-TAL-RAR.23,L_MODV2_SOIL_AL_003
+S-AL-CACL2.23,L_MODV2_SOIL_AL_004
+S-AL.19,L_MODV2_SOIL_AL_005
+S-AL-DTPA-SORB.05,L_MODV2_SOIL_AL_006
+S-AL-H3A.04,L_MODV2_SOIL_AL_010
+S-AL-RES.04,L_MODV2_SOIL_AL_011
+S-AL-M3.05,L_MODV2_SOIL_AL_012
+S-AL-NA.04,L_MODV2_SOIL_AL_014
+S-AL-1KCL.23,L_MODV2_SOIL_AL_018
+S-AL-KCL.05,L_MODV2_SOIL_AL_018
+S-Al-KCL.12,L_MODV2_SOIL_AL_020
+S-AL-SP.04,L_MODV2_SOIL_AL_022
+S-AN-12.00,L_MODV2_SOIL_AMINON_001
+S-AS-AR.07,L_MODV2_SOIL_AS_001
+S-AS-EPA6010B.00,L_MODV2_SOIL_AS_002
+S-AS-EPA3050.04,L_MODV2_SOIL_AS_003
+S-SARJ-SP.00,L_MODV2_SOIL_ASAR_001
+S-B-CACL2.23,L_MODV2_SOIL_B_001
+S-B-HW.01.10,L_MODV2_SOIL_B_003
+S-B-HW.05,L_MODV2_SOIL_B_004
+S-B-W1:1.04,L_MODV2_SOIL_B_005
+S-B-W1:2.01,L_MODV2_SOIL_B_006
+S-B-W1:5.01,L_MODV2_SOIL_B_007
+S-B-W1:5.23,L_MODV2_SOIL_B_008
+S-B-W20:1.04,L_MODV2_SOIL_B_009
+S-B-SP.04,L_MODV2_SOIL_B_010
+S-B-DTPA-SORB.05,L_MODV2_SOIL_B_011
+S-B-EPA3050.04,L_MODV2_SOIL_B_012
+S-B-RES.04,L_MODV2_SOIL_B_015
+S-B-M1.04,L_MODV2_SOIL_B_016
+S-B-M3.04,L_MODV2_SOIL_B_017
+S-B-NA.04,L_MODV2_SOIL_B_019
+S-BA-EPA3050.04,L_MODV2_SOIL_BA_001
+S-BD-Clod.00,L_MODV2_SOIL_BD_001
+S-BD-Coarse.15,L_MODV2_SOIL_BD_002
+S-BD-Core.00,L_MODV2_SOIL_BD_003
+S-BD-Fine.15,L_MODV2_SOIL_BD_004
+S-BD-Scoop.00,L_MODV2_SOIL_BD_005
+S-BD.19,L_MODV2_SOIL_BD_006
+S-BPH-AEB.02,L_MODV2_SOIL_BPH_001
+S-BPH-MAEB.02,L_MODV2_SOIL_BPH_002
+S-BPH.19,L_MODV2_SOIL_BPH_003
+S-BPH-MEB.02,L_MODV2_SOIL_BPH_004
+S-BPH-SIK1.02,L_MODV2_SOIL_BPH_007
+S-BPH-SIK2.02,L_MODV2_SOIL_BPH_008
+S-BPH-SMPB.02,L_MODV2_SOIL_BPH_009
+S-BPH-WB.02,L_MODV2_SOIL_BPH_010
+S-BPH-MWB.02,L_MODV2_SOIL_BPH_011
+S-BS.19,L_MODV2_SOIL_BS_001
+S-C-W-04,L_MODV2_SOIL_C_001
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+L_MODV2_SOIL_CA_011,L_MODV2_SOIL_CA_037
+L_MODV2_SOIL_CA_012,L_MODV2_SOIL_CA_038
+L_MODV2_SOIL_CA_013,L_MODV2_SOIL_CA_039
+L_MODV2_SOIL_CA_014,L_MODV2_SOIL_CA_040
+L_MODV2_SOIL_CA_015,L_MODV2_SOIL_CA_041
+L_MODV2_SOIL_CA_016,L_MODV2_SOIL_CA_042
+L_MODV2_SOIL_CA_017,L_MODV2_SOIL_CA_043
+L_MODV2_SOIL_CA_018,L_MODV2_SOIL_CA_044
+L_MODV2_SOIL_CA_019,L_MODV2_SOIL_CA_045
+L_MODV2_SOIL_CA_020,L_MODV2_SOIL_CA_046
+L_MODV2_SOIL_CA_021,L_MODV2_SOIL_CA_047
+L_MODV2_SOIL_CA_023,L_MODV2_SOIL_CA_048
+L_MODV2_SOIL_CA_024,L_MODV2_SOIL_CA_049
+L_MODV2_SOIL_CA_027,L_MODV2_SOIL_CA_050
+L_MODV2_SOIL_CA_030,L_MODV2_SOIL_CA_051
+L_MODV2_SOIL_CA_032,L_MODV2_SOIL_CA_052
+L_MODV2_SOIL_C_001,L_MODV2_SOIL_C_002
+L_MODV2_SOIL_CMP_001,L_MODV2_SOIL_CMP_018
+L_MODV2_SOIL_CMP_002,L_MODV2_SOIL_CMP_019
+L_MODV2_SOIL_CMP_003,L_MODV2_SOIL_CMP_020
+L_MODV2_SOIL_CMP_004,L_MODV2_SOIL_CMP_021
+L_MODV2_SOIL_CMP_005,L_MODV2_SOIL_CMP_022
+L_MODV2_SOIL_CMP_006,L_MODV2_SOIL_CMP_023
+L_MODV2_SOIL_CMP_007,L_MODV2_SOIL_CMP_024
+L_MODV2_SOIL_CMP_008,L_MODV2_SOIL_CMP_025
+L_MODV2_SOIL_CMP_009,L_MODV2_SOIL_CMP_026
+L_MODV2_SOIL_CMP_010,L_MODV2_SOIL_CMP_027
+L_MODV2_SOIL_CMP_011,L_MODV2_SOIL_CMP_028
+L_MODV2_SOIL_CMP_012,L_MODV2_SOIL_CMP_029
+L_MODV2_SOIL_CMP_013,L_MODV2_SOIL_CMP_030
+L_MODV2_SOIL_CMP_014,L_MODV2_SOIL_CMP_031
+L_MODV2_SOIL_CMP_015,L_MODV2_SOIL_CMP_032
+L_MODV2_SOIL_CMP_016,L_MODV2_SOIL_CMP_033
+L_MODV2_SOIL_CMP_017,L_MODV2_SOIL_CMP_034
+L_MODV2_SOIL_CEC_001,L_MODV2_SOIL_CEC_012
+L_MODV2_SOIL_CEC_002,L_MODV2_SOIL_CEC_013
+L_MODV2_SOIL_CEC_003,L_MODV2_SOIL_CEC_014
+L_MODV2_SOIL_CEC_004,L_MODV2_SOIL_CEC_015
+L_MODV2_SOIL_CL_005,L_MODV2_SOIL_CL_021
+L_MODV2_SOIL_CR_001,L_MODV2_SOIL_CR_007
+L_MODV2_SOIL_CR_002,L_MODV2_SOIL_CR_008
+L_MODV2_SOIL_CR_003,L_MODV2_SOIL_CR_009
+L_MODV2_SOIL_CR_004,L_MODV2_SOIL_CR_010
+L_MODV2_SOIL_CR_006,L_MODV2_SOIL_CR_011
+L_MODV2_SOIL_CO_001,L_MODV2_SOIL_CO_010
+L_MODV2_SOIL_CO_002,L_MODV2_SOIL_CO_011
+L_MODV2_SOIL_CO_005,L_MODV2_SOIL_CO_012
+L_MODV2_SOIL_CO_007,L_MODV2_SOIL_CO_013
+L_MODV2_SOIL_CO_008,L_MODV2_SOIL_CO_014
+L_MODV2_SOIL_CO_009,L_MODV2_SOIL_CO_015
+L_MODV2_SOIL_CU_001,L_MODV2_SOIL_CU_024
+L_MODV2_SOIL_CU_002,L_MODV2_SOIL_CU_025
+L_MODV2_SOIL_CU_003,L_MODV2_SOIL_CU_026
+L_MODV2_SOIL_CU_004,L_MODV2_SOIL_CU_027
+L_MODV2_SOIL_CU_005,L_MODV2_SOIL_CU_028
+L_MODV2_SOIL_CU_006,L_MODV2_SOIL_CU_029
+L_MODV2_SOIL_CU_007,L_MODV2_SOIL_CU_030
+L_MODV2_SOIL_CU_009,L_MODV2_SOIL_CU_031
+L_MODV2_SOIL_CU_010,L_MODV2_SOIL_CU_032
+L_MODV2_SOIL_CU_011,L_MODV2_SOIL_CU_033
+L_MODV2_SOIL_CU_012,L_MODV2_SOIL_CU_034
+L_MODV2_SOIL_CU_013,L_MODV2_SOIL_CU_035
+L_MODV2_SOIL_CU_014,L_MODV2_SOIL_CU_036
+L_MODV2_SOIL_CU_016,L_MODV2_SOIL_CU_037
+L_MODV2_SOIL_CU_017,L_MODV2_SOIL_CU_038
+L_MODV2_SOIL_CU_022,L_MODV2_SOIL_CU_039
+L_MODV2_SOIL_CU_023,L_MODV2_SOIL_CU_040
+L_MODV2_SOIL_DON_001,L_MODV2_SOIL_DON_002
+L_MODV2_SOIL_FE_001,L_MODV2_SOIL_FE_023
+L_MODV2_SOIL_FE_002,L_MODV2_SOIL_FE_024
+L_MODV2_SOIL_FE_003,L_MODV2_SOIL_FE_025
+L_MODV2_SOIL_FE_004,L_MODV2_SOIL_FE_026
+L_MODV2_SOIL_FE_005,L_MODV2_SOIL_FE_027
+L_MODV2_SOIL_FE_007,L_MODV2_SOIL_FE_028
+L_MODV2_SOIL_FE_008,L_MODV2_SOIL_FE_029
+L_MODV2_SOIL_FE_009,L_MODV2_SOIL_FE_030
+L_MODV2_SOIL_FE_010,L_MODV2_SOIL_FE_031
+L_MODV2_SOIL_FE_011,L_MODV2_SOIL_FE_032
+L_MODV2_SOIL_FE_012,L_MODV2_SOIL_FE_033
+L_MODV2_SOIL_FE_013,L_MODV2_SOIL_FE_034
+L_MODV2_SOIL_FE_014,L_MODV2_SOIL_FE_035
+L_MODV2_SOIL_FE_015,L_MODV2_SOIL_FE_036
+L_MODV2_SOIL_FE_022,L_MODV2_SOIL_FE_037
+L_MODV2_SOIL_PB_001,L_MODV2_SOIL_PB_010
+L_MODV2_SOIL_PB_002,L_MODV2_SOIL_PB_011
+L_MODV2_SOIL_PB_003,L_MODV2_SOIL_PB_012
+L_MODV2_SOIL_PB_004,L_MODV2_SOIL_PB_013
+L_MODV2_SOIL_PB_005,L_MODV2_SOIL_PB_014
+L_MODV2_SOIL_PB_009,L_MODV2_SOIL_PB_015
+L_MODV2_SOIL_LI_001,L_MODV2_SOIL_LI_002
+L_MODV2_SOIL_MG_002,L_MODV2_SOIL_MG_032
+L_MODV2_SOIL_MG_006,L_MODV2_SOIL_MG_033
+L_MODV2_SOIL_MG_007,L_MODV2_SOIL_MG_034
+L_MODV2_SOIL_MG_009,L_MODV2_SOIL_MG_035
+L_MODV2_SOIL_MG_010,L_MODV2_SOIL_MG_036
+L_MODV2_SOIL_MG_011,L_MODV2_SOIL_MG_037
+L_MODV2_SOIL_MG_012,L_MODV2_SOIL_MG_038
+L_MODV2_SOIL_MG_013,L_MODV2_SOIL_MG_039
+L_MODV2_SOIL_MG_014,L_MODV2_SOIL_MG_040
+L_MODV2_SOIL_MG_015,L_MODV2_SOIL_MG_041
+L_MODV2_SOIL_MG_016,L_MODV2_SOIL_MG_042
+L_MODV2_SOIL_MG_017,L_MODV2_SOIL_MG_043
+L_MODV2_SOIL_MG_018,L_MODV2_SOIL_MG_044
+L_MODV2_SOIL_MG_019,L_MODV2_SOIL_MG_045
+L_MODV2_SOIL_MG_020,L_MODV2_SOIL_MG_046
+L_MODV2_SOIL_MG_022,L_MODV2_SOIL_MG_047
+L_MODV2_SOIL_MG_023,L_MODV2_SOIL_MG_048
+L_MODV2_SOIL_MG_024,L_MODV2_SOIL_MG_049
+L_MODV2_SOIL_MG_028,L_MODV2_SOIL_MG_050
+L_MODV2_SOIL_MG_029,L_MODV2_SOIL_MG_051
+L_MODV2_SOIL_MG_031,L_MODV2_SOIL_MG_052
+L_MODV2_SOIL_MN_001,L_MODV2_SOIL_MN_025
+L_MODV2_SOIL_MN_002,L_MODV2_SOIL_MN_026
+L_MODV2_SOIL_MN_003,L_MODV2_SOIL_MN_027
+L_MODV2_SOIL_MN_004,L_MODV2_SOIL_MN_028
+L_MODV2_SOIL_MN_005,L_MODV2_SOIL_MN_029
+L_MODV2_SOIL_MN_006,L_MODV2_SOIL_MN_030
+L_MODV2_SOIL_MN_007,L_MODV2_SOIL_MN_031
+L_MODV2_SOIL_MN_008,L_MODV2_SOIL_MN_032
+L_MODV2_SOIL_MN_009,L_MODV2_SOIL_MN_033
+L_MODV2_SOIL_MN_010,L_MODV2_SOIL_MN_034
+L_MODV2_SOIL_MN_011,L_MODV2_SOIL_MN_035
+L_MODV2_SOIL_MN_012,L_MODV2_SOIL_MN_036
+L_MODV2_SOIL_MN_013,L_MODV2_SOIL_MN_037
+L_MODV2_SOIL_MN_015,L_MODV2_SOIL_MN_038
+L_MODV2_SOIL_MN_016,L_MODV2_SOIL_MN_039
+L_MODV2_SOIL_MN_017,L_MODV2_SOIL_MN_040
+L_MODV2_SOIL_MN_019,L_MODV2_SOIL_MN_041
+L_MODV2_SOIL_MN_023,L_MODV2_SOIL_MN_042
+L_MODV2_SOIL_HG_001,L_MODV2_SOIL_HG_004
+L_MODV2_SOIL_HG_002,L_MODV2_SOIL_HG_005
+L_MODV2_SOIL_HG_003,L_MODV2_SOIL_HG_006
+L_MODV2_SOIL_MO_001,L_MODV2_SOIL_MO_023
+L_MODV2_SOIL_MO_002,L_MODV2_SOIL_MO_024
+L_MODV2_SOIL_MO_003,L_MODV2_SOIL_MO_025
+L_MODV2_SOIL_MO_004,L_MODV2_SOIL_MO_026
+L_MODV2_SOIL_MO_005,L_MODV2_SOIL_MO_027
+L_MODV2_SOIL_MO_006,L_MODV2_SOIL_MO_028
+L_MODV2_SOIL_MO_007,L_MODV2_SOIL_MO_029
+L_MODV2_SOIL_MO_008,L_MODV2_SOIL_MO_030
+L_MODV2_SOIL_MO_009,L_MODV2_SOIL_MO_031
+L_MODV2_SOIL_MO_010,L_MODV2_SOIL_MO_032
+L_MODV2_SOIL_MO_011,L_MODV2_SOIL_MO_033
+L_MODV2_SOIL_MO_012,L_MODV2_SOIL_MO_034
+L_MODV2_SOIL_MO_014,L_MODV2_SOIL_MO_035
+L_MODV2_SOIL_MO_020,L_MODV2_SOIL_MO_036
+L_MODV2_SOIL_NI_002,L_MODV2_SOIL_NI_006
+L_MODV2_SOIL_NI_003,L_MODV2_SOIL_NI_007
+L_MODV2_SOIL_NI_004,L_MODV2_SOIL_NI_008
+L_MODV2_SOIL_NI_005,L_MODV2_SOIL_NI_009
+L_MODV2_SOIL_NO3N_001,L_MODV2_SOIL_NO3N_023
+L_MODV2_SOIL_NO3N_002,L_MODV2_SOIL_NO3N_024
+L_MODV2_SOIL_NO3N_003,L_MODV2_SOIL_NO3N_025
+L_MODV2_SOIL_NO3N_004,L_MODV2_SOIL_NO3N_026
+L_MODV2_SOIL_NO3N_008,L_MODV2_SOIL_NO3N_027
+L_MODV2_SOIL_NO3N_009,L_MODV2_SOIL_NO3N_028
+L_MODV2_SOIL_NO3N_010,L_MODV2_SOIL_NO3N_029
+L_MODV2_SOIL_NO3N_011,L_MODV2_SOIL_NO3N_030
+L_MODV2_SOIL_NO3N_012,L_MODV2_SOIL_NO3N_031
+L_MODV2_SOIL_NO3N_013,L_MODV2_SOIL_NO3N_032
+L_MODV2_SOIL_NO3N_014,L_MODV2_SOIL_NO3N_033
+L_MODV2_SOIL_NO3N_015,L_MODV2_SOIL_NO3N_034
+L_MODV2_SOIL_NO3N_016,L_MODV2_SOIL_NO3N_035
+L_MODV2_SOIL_NO3N_017,L_MODV2_SOIL_NO3N_036
+L_MODV2_SOIL_NO3N_021,L_MODV2_SOIL_NO3N_037
+L_MODV2_SOIL_NO2N_001,L_MODV2_SOIL_NO2N_002
+L_MODV2_SOIL_NMR_001,L_MODV2_SOIL_NMR_002
+L_MODV2_SOIL_TN_004,L_MODV2_SOIL_TN_005
+L_MODV2_SOIL_POM_001,L_MODV2_SOIL_POM_002
+L_MODV2_SOIL_MNO4OXC_001,L_MODV2_SOIL_MNO4OXC_003
+L_MODV2_SOIL_MNO4OXC_002,L_MODV2_SOIL_MNO4OXC_004
+L_MODV2_SOIL_PH_001,L_MODV2_SOIL_PH_014
+L_MODV2_SOIL_PO4_001,L_MODV2_SOIL_PO4_002
+L_MODV2_SOIL_PLFA_001,L_MODV2_SOIL_PLFA_002
+L_MODV2_SOIL_PMONOEST_001,L_MODV2_SOIL_PMONOEST_002
+L_MODV2_SOIL_P_001,L_MODV2_SOIL_P_050
+L_MODV2_SOIL_P_002,L_MODV2_SOIL_P_051
+L_MODV2_SOIL_P_003,L_MODV2_SOIL_P_052
+L_MODV2_SOIL_P_004,L_MODV2_SOIL_P_053
+L_MODV2_SOIL_P_005,L_MODV2_SOIL_P_054
+L_MODV2_SOIL_P_006,L_MODV2_SOIL_P_055
+L_MODV2_SOIL_P_009,L_MODV2_SOIL_P_056
+L_MODV2_SOIL_P_010,L_MODV2_SOIL_P_057
+L_MODV2_SOIL_P_011,L_MODV2_SOIL_P_058
+L_MODV2_SOIL_P_012,L_MODV2_SOIL_P_059
+L_MODV2_SOIL_P_013,L_MODV2_SOIL_P_060
+L_MODV2_SOIL_P_014,L_MODV2_SOIL_P_061
+L_MODV2_SOIL_P_015,L_MODV2_SOIL_P_062
+L_MODV2_SOIL_P_016,L_MODV2_SOIL_P_063
+L_MODV2_SOIL_P_017,L_MODV2_SOIL_P_064
+L_MODV2_SOIL_P_018,L_MODV2_SOIL_P_065
+L_MODV2_SOIL_P_019,L_MODV2_SOIL_P_066
+L_MODV2_SOIL_P_020,L_MODV2_SOIL_P_067
+L_MODV2_SOIL_P_021,L_MODV2_SOIL_P_068
+L_MODV2_SOIL_P_022,L_MODV2_SOIL_P_069
+L_MODV2_SOIL_P_023,L_MODV2_SOIL_P_070
+L_MODV2_SOIL_P_024,L_MODV2_SOIL_P_071
+L_MODV2_SOIL_P_025,L_MODV2_SOIL_P_072
+L_MODV2_SOIL_P_026,L_MODV2_SOIL_P_073
+L_MODV2_SOIL_P_027,L_MODV2_SOIL_P_074
+L_MODV2_SOIL_P_028,L_MODV2_SOIL_P_075
+L_MODV2_SOIL_P_029,L_MODV2_SOIL_P_076
+L_MODV2_SOIL_P_032,L_MODV2_SOIL_P_077
+L_MODV2_SOIL_P_033,L_MODV2_SOIL_P_078
+L_MODV2_SOIL_P_034,L_MODV2_SOIL_P_079
+L_MODV2_SOIL_P_035,L_MODV2_SOIL_P_080
+L_MODV2_SOIL_P_036,L_MODV2_SOIL_P_081
+L_MODV2_SOIL_P_037,L_MODV2_SOIL_P_082
+L_MODV2_SOIL_P_039,L_MODV2_SOIL_P_083
+L_MODV2_SOIL_P_045,L_MODV2_SOIL_P_084
+L_MODV2_SOIL_P_046,L_MODV2_SOIL_P_085
+L_MODV2_SOIL_P_047,L_MODV2_SOIL_P_086
+L_MODV2_SOIL_P_048,L_MODV2_SOIL_P_087
+L_MODV2_SOIL_PBUFINDEX_001,L_MODV2_SOIL_PBUFINDEX_005
+L_MODV2_SOIL_PBUFINDEX_002,L_MODV2_SOIL_PBUFINDEX_006
+L_MODV2_SOIL_PBUFINDEX_003,L_MODV2_SOIL_PBUFINDEX_007
+L_MODV2_SOIL_PBUFINDEX_004,L_MODV2_SOIL_PBUFINDEX_008
+L_MODV2_SOIL_PERINDEX_001,L_MODV2_SOIL_PERINDEX_002
+L_MODV2_SOIL_PFF_001,L_MODV2_SOIL_PFF_002
+L_MODV2_SOIL_PINDEX_003,L_MODV2_SOIL_PINDEX_006
+L_MODV2_SOIL_PINDEX_004,L_MODV2_SOIL_PINDEX_007
+L_MODV2_SOIL_PINDEX_005,L_MODV2_SOIL_PINDEX_008
+L_MODV2_SOIL_PRI_001,L_MODV2_SOIL_PRI_002
+L_MODV2_SOIL_PSINDEX_001,L_MODV2_SOIL_PSINDEX_003
+L_MODV2_SOIL_PSINDEX_002,L_MODV2_SOIL_PSINDEX_004
+L_MODV2_SOIL_TP_001,L_MODV2_SOIL_TP_003
+L_MODV2_SOIL_TP_002,L_MODV2_SOIL_TP_004
+L_MODV2_SOIL_K_002,L_MODV2_SOIL_K_051
+L_MODV2_SOIL_K_003,L_MODV2_SOIL_K_052
+L_MODV2_SOIL_K_007,L_MODV2_SOIL_K_053
+L_MODV2_SOIL_K_008,L_MODV2_SOIL_K_054
+L_MODV2_SOIL_K_009,L_MODV2_SOIL_K_055
+L_MODV2_SOIL_K_010,L_MODV2_SOIL_K_056
+L_MODV2_SOIL_K_011,L_MODV2_SOIL_K_057
+L_MODV2_SOIL_K_012,L_MODV2_SOIL_K_058
+L_MODV2_SOIL_K_013,L_MODV2_SOIL_K_059
+L_MODV2_SOIL_K_014,L_MODV2_SOIL_K_060
+L_MODV2_SOIL_K_015,L_MODV2_SOIL_K_061
+L_MODV2_SOIL_K_016,L_MODV2_SOIL_K_062
+L_MODV2_SOIL_K_017,L_MODV2_SOIL_K_063
+L_MODV2_SOIL_K_018,L_MODV2_SOIL_K_064
+L_MODV2_SOIL_K_019,L_MODV2_SOIL_K_065
+L_MODV2_SOIL_K_022,L_MODV2_SOIL_K_066
+L_MODV2_SOIL_K_023,L_MODV2_SOIL_K_067
+L_MODV2_SOIL_K_024,L_MODV2_SOIL_K_068
+L_MODV2_SOIL_K_025,L_MODV2_SOIL_K_069
+L_MODV2_SOIL_K_026,L_MODV2_SOIL_K_070
+L_MODV2_SOIL_K_027,L_MODV2_SOIL_K_071
+L_MODV2_SOIL_K_029,L_MODV2_SOIL_K_072
+L_MODV2_SOIL_K_030,L_MODV2_SOIL_K_073
+L_MODV2_SOIL_K_031,L_MODV2_SOIL_K_074
+L_MODV2_SOIL_K_033,L_MODV2_SOIL_K_075
+L_MODV2_SOIL_K_034,L_MODV2_SOIL_K_076
+L_MODV2_SOIL_K_038,L_MODV2_SOIL_K_077
+L_MODV2_SOIL_K_043,L_MODV2_SOIL_K_078
+L_MODV2_SOIL_K_044,L_MODV2_SOIL_K_079
+L_MODV2_SOIL_K_045,L_MODV2_SOIL_K_080
+L_MODV2_SOIL_K_046,L_MODV2_SOIL_K_081
+L_MODV2_SOIL_K_049,L_MODV2_SOIL_K_082
+L_MODV2_SOIL_K_050,L_MODV2_SOIL_K_083
+L_MODV2_SOIL_TK_001,L_MODV2_SOIL_TK_004
+L_MODV2_SOIL_TK_002,L_MODV2_SOIL_TK_005
+L_MODV2_SOIL_TK_003,L_MODV2_SOIL_TK_006
+L_MODV2_SOIL_POTMN_003,L_MODV2_SOIL_POTMN_004
+L_MODV2_SOIL_SE_001,L_MODV2_SOIL_SE_007
+L_MODV2_SOIL_SE_002,L_MODV2_SOIL_SE_008
+L_MODV2_SOIL_SE_003,L_MODV2_SOIL_SE_009
+L_MODV2_SOIL_SE_004,L_MODV2_SOIL_SE_010
+L_MODV2_SOIL_SE_005,L_MODV2_SOIL_SE_011
+L_MODV2_SOIL_SE_006,L_MODV2_SOIL_SE_012
+L_MODV2_SOIL_SI_001,L_MODV2_SOIL_SI_007
+L_MODV2_SOIL_SI_002,L_MODV2_SOIL_SI_008
+L_MODV2_SOIL_SI_003,L_MODV2_SOIL_SI_009
+L_MODV2_SOIL_SI_006,L_MODV2_SOIL_SI_010
+L_MODV2_SOIL_AG_001,L_MODV2_SOIL_AG_002
+L_MODV2_SOIL_NA_001,L_MODV2_SOIL_NA_025
+L_MODV2_SOIL_NA_005,L_MODV2_SOIL_NA_026
+L_MODV2_SOIL_NA_006,L_MODV2_SOIL_NA_027
+L_MODV2_SOIL_NA_007,L_MODV2_SOIL_NA_028
+L_MODV2_SOIL_NA_008,L_MODV2_SOIL_NA_029
+L_MODV2_SOIL_NA_009,L_MODV2_SOIL_NA_030
+L_MODV2_SOIL_NA_011,L_MODV2_SOIL_NA_031
+L_MODV2_SOIL_NA_012,L_MODV2_SOIL_NA_032
+L_MODV2_SOIL_NA_013,L_MODV2_SOIL_NA_033
+L_MODV2_SOIL_NA_016,L_MODV2_SOIL_NA_034
+L_MODV2_SOIL_NA_018,L_MODV2_SOIL_NA_035
+L_MODV2_SOIL_SS_001,L_MODV2_SOIL_SS_002
+L_MODV2_SOIL_SR_001,L_MODV2_SOIL_SR_003
+L_MODV2_SOIL_SR_002,L_MODV2_SOIL_SR_004
+L_MODV2_SOIL_SO4S_001,L_MODV2_SOIL_SO4S_008
+L_MODV2_SOIL_SO4S_002,L_MODV2_SOIL_SO4S_009
+L_MODV2_SOIL_SO4S_003,L_MODV2_SOIL_SO4S_010
+L_MODV2_SOIL_S_001,L_MODV2_SOIL_S_037
+L_MODV2_SOIL_S_002,L_MODV2_SOIL_S_038
+L_MODV2_SOIL_S_003,L_MODV2_SOIL_S_039
+L_MODV2_SOIL_S_004,L_MODV2_SOIL_S_040
+L_MODV2_SOIL_S_005,L_MODV2_SOIL_S_041
+L_MODV2_SOIL_S_006,L_MODV2_SOIL_S_042
+L_MODV2_SOIL_S_007,L_MODV2_SOIL_S_043
+L_MODV2_SOIL_S_008,L_MODV2_SOIL_S_044
+L_MODV2_SOIL_S_010,L_MODV2_SOIL_S_045
+L_MODV2_SOIL_S_012,L_MODV2_SOIL_S_046
+L_MODV2_SOIL_S_013,L_MODV2_SOIL_S_047
+L_MODV2_SOIL_S_014,L_MODV2_SOIL_S_048
+L_MODV2_SOIL_S_015,L_MODV2_SOIL_S_049
+L_MODV2_SOIL_S_016,L_MODV2_SOIL_S_050
+L_MODV2_SOIL_S_017,L_MODV2_SOIL_S_051
+L_MODV2_SOIL_S_018,L_MODV2_SOIL_S_052
+L_MODV2_SOIL_S_019,L_MODV2_SOIL_S_053
+L_MODV2_SOIL_S_021,L_MODV2_SOIL_S_054
+L_MODV2_SOIL_S_022,L_MODV2_SOIL_S_055
+L_MODV2_SOIL_S_023,L_MODV2_SOIL_S_056
+L_MODV2_SOIL_S_024,L_MODV2_SOIL_S_057
+L_MODV2_SOIL_S_026,L_MODV2_SOIL_S_058
+L_MODV2_SOIL_S_028,L_MODV2_SOIL_S_059
+L_MODV2_SOIL_S_029,L_MODV2_SOIL_S_060
+L_MODV2_SOIL_S_035,L_MODV2_SOIL_S_061
+L_MODV2_SOIL_SN_001,L_MODV2_SOIL_SN_004
+L_MODV2_SOIL_SN_002,L_MODV2_SOIL_SN_005
+L_MODV2_SOIL_SN_003,L_MODV2_SOIL_SN_006
+L_MODV2_SOIL_UREA_001,L_MODV2_SOIL_UREA_002
+L_MODV2_SOIL_WEN_001,L_MODV2_SOIL_WEN_002
+L_MODV2_SOIL_TDN_001,L_MODV2_SOIL_WEON_002
+L_MODV2_SOIL_WEON_001,L_MODV2_SOIL_WEON_003
+L_MODV2_SOIL_WSC_001,L_MODV2_SOIL_WSC_002
+L_MODV2_SOIL_WSOC_001,L_MODV2_SOIL_WSOC_002
+L_MODV2_SOIL_ZN_001,L_MODV2_SOIL_ZN_025
+L_MODV2_SOIL_ZN_002,L_MODV2_SOIL_ZN_026
+L_MODV2_SOIL_ZN_003,L_MODV2_SOIL_ZN_027
+L_MODV2_SOIL_ZN_004,L_MODV2_SOIL_ZN_028
+L_MODV2_SOIL_ZN_005,L_MODV2_SOIL_ZN_029
+L_MODV2_SOIL_ZN_006,L_MODV2_SOIL_ZN_030
+L_MODV2_SOIL_ZN_007,L_MODV2_SOIL_ZN_031
+L_MODV2_SOIL_ZN_008,L_MODV2_SOIL_ZN_032
+L_MODV2_SOIL_ZN_009,L_MODV2_SOIL_ZN_033
+L_MODV2_SOIL_ZN_010,L_MODV2_SOIL_ZN_034
+L_MODV2_SOIL_ZN_011,L_MODV2_SOIL_ZN_035
+L_MODV2_SOIL_ZN_012,L_MODV2_SOIL_ZN_036
+L_MODV2_SOIL_ZN_013,L_MODV2_SOIL_ZN_037
+L_MODV2_SOIL_ZN_014,L_MODV2_SOIL_ZN_038
+L_MODV2_SOIL_ZN_015,L_MODV2_SOIL_ZN_039
+L_MODV2_SOIL_ZN_017,L_MODV2_SOIL_ZN_040
+L_MODV2_SOIL_ZN_018,L_MODV2_SOIL_ZN_041
+,
+,
+,
+,
+,
+,
+,
+L_MODV2_SOIL_TIN_001,L_MODV2_SOIL_TIN_002
diff --git a/Method Lists/Modus2 Soil Code Supersession.xlsx b/Method Lists/Modus2 Soil Code Supersession.xlsx
index 3b6f60b..ac53a83 100644
Binary files a/Method Lists/Modus2 Soil Code Supersession.xlsx and b/Method Lists/Modus2 Soil Code Supersession.xlsx differ