Ag Data Commons: https://data.nal.usda.gov/
USDA data lists by agency: https://www.usda.gov/topics/data
NAL database of databases: https://www.nal.usda.gov/afsic/databases-0
USDA data on data.gov: https://catalog.data.gov/organization/usda-gov
Agriculture & Food on data.cov: https://catalog.data.gov/dataset?groups=agriculture8571#topic=food_navigation
Research datasets: https://www.ars.usda.gov/research/datasets/
AGCROS: https://agcros-usdaars.opendata.arcgis.com/
PLANTS database: https://plants.usda.gov/java/
Web Soil Survey: https://websoilsurvey.nrcs.usda.gov/app/#
Soil Data Access: https://sdmdataaccess.nrcs.usda.gov/
Soil Climate Analysis: https://www.wcc.nrcs.usda.gov/scan/
National Fact Sheets: https://www.rma.usda.gov/Topics/National-Fact-Sheets
Cover Crop infromation: https://www.rma.usda.gov/Topics/Cover-Crops
Actuarial Information: https://webapp.rma.usda.gov/apps/ActuarialInformationBrowser/Default.aspx
Ag Census, Demograpyhics, Crops, etcc. All Data: https://www.nass.usda.gov/Data_and_Statistics/index.php
Commodity Reports: https://www.nass.usda.gov/Publications/
Cropscape: https://nassgeodata.gmu.edu/CropScape/
Annual CDLs: https://www.nass.usda.gov/Research_and_Science/Cropland/Release/index.php
Food and Nutrient Database: https://ndb.nal.usda.gov/ndb/
Thesaurus & Glossary: https://agclass.nal.usda.gov/about.shtml
Long Term Agricultural Research: https://ltar.nal.usda.gov/
Current ag research: https://cris.nifa.usda.gov/search.html
Water data: https://waterdata.usgs.gov/nwis
Earth observations: https://earthdata.nasa.gov/earth-observation-data
Atmospheric composition, water & energy cycles and climate variability: https://disc.gsfc.nasa.gov/
Daily precipitation data: https://www.weather.gov/marfc/DailyPrecipitation
Predicted precipitation data: https://water.weather.gov/precip/download.php
Haug & Ostermann's Crop/Weed Field Image Dataset: https://github.com/cwfid/dataset
ESRI Living Atlas, Geospatial Datasets: https://livingatlas.arcgis.com/en/browse/
UCIrvine's Climate Action Workshop, relevant datasets: https://github.com/strongh/ClimateActionR
Iris: https://archive.ics.uci.edu/ml/datasets/Iris
Urban Land Cover: https://archive.ics.uci.edu/ml/datasets/Urban+Land+Cover
Leaf: https://archive.ics.uci.edu/ml/datasets/Leaf
Crowdsourced Map: https://archive.ics.uci.edu/ml/datasets/Crowdsourced+Mapping
Mushroom: https://archive.ics.uci.edu/ml/datasets/Mushroom
Leaves of 100 plant species: https://archive.ics.uci.edu/ml/datasets/One-hundred+plant+species+leaves+data+set
USDA Plants: https://archive.ics.uci.edu/ml/datasets/Plants
Wheat kernals: https://archive.ics.uci.edu/ml/datasets/seeds
Soybean (large): https://archive.ics.uci.edu/ml/datasets/Soybean+%28Large%29
Soybean (small): https://archive.ics.uci.edu/ml/datasets/Soybean+%28Small%29
Wilt: https://archive.ics.uci.edu/ml/datasets/Wilt
Yeast: https://archive.ics.uci.edu/ml/datasets/Yeast