Update cassava model (MANIHOT)

[lpmorenoc]

Main changes:

• Adding an hourly VPD effect for photosynthesis and transpiration (based on the daily Priestley-Taylor, MEPHO = V).
• Verify/modify N subroutines to allow different N concentration in the leaves and stems based on cohort age, allow remobilization of N from senescing leaves or due to the reduction of N when the cohort ages (lignified stems or older leaves).
• Add percentage of dry matter in the storage roots (modified by plant age, temperature and remobilization of assimilates).
• Add cassava coefficients in RESCH047.SDA.
• Modifications in the crop parameter files:
  • Cultivar: Add B34ND (time from 3rd to 4th branching)
  • Ecotype: Add PHSV (sensitivity to VPD), PHTV (VPD threshold), RDGS (Root depth growth rate), RLWR (Root length/weight ratio), WFSU (water factor leaf senescence), RSUSE (reserves remobilization fraction), HMPC (standard dry matter content)
  • Species:
    • Remove: CHT%, CLA%, CO2CC, CO2EX, LLIFX, LLOSA, NFSU, PARFC, RATM, RCROP, RS%O, RSEN%, RSFRS, RWULF, WFEU, WFPL, WFPU, WFSU.
    • Move to ecotype: PGERM, PHSV, PHTV, RLWR, RDGS, WFSU.
    • New: LN%SC, PDTV, PDSV, dry matter coefficients (DMAG,DMIC, DMRD, TRDMC), LWLOS
• Modify specific leaf area based on temperature.
• Canopy height with reasonable values.
• Bug fixed: model was not running when simulation and planting dates were different years.
• Modify parameter values for fibrous root growth.