Start | Index | Overview • PREV | UP | NEXT Consult reference for description of algorithms.
This module calculates only the crop part. For soil water there is the complementary module GecrosSoilWater. There is also a module Gecros, where crop and soil water part are calculated simultaneusly.
Reference: Yin, X. and van Laar, H.H. (2005): Crop Systems Dynamics. An ecophysiological simulation model for genotype-by-environment interactions. Wageningen Academic Publishers, Wageningen, The Netherlands.
| Content Type | Name | Description | Data Type | Unit | Min Value | Max Value | Default Value |
|---|---|---|---|---|---|---|---|
| constant | cAnthesisDS | Development stage of anthesis | DOUBLE | 1 | - | - | 1.0 |
| constant | cBLD | Leaf angle (from horizontal) | DOUBLE | ° | - | - | 50.0 |
| constant | cC3C4 | Crop type (true for C3, false for C4 crops) | BOOLEAN | 1 | - | - | false |
| constant | cCB | Factor for initial N concentration of seed fill | DOUBLE | 1 | - | - | 0.75 |
| constant | cCCFIX | C cost of symbiotic N fixation | DOUBLE | g/g | - | - | 6.0 |
| constant | cCDMHT | Stem dry weight per unit of plant height | DOUBLE | g m-2 m-1 | - | - | 345.0 |
| constant | cCFV | C fraction in the vegetative organs | DOUBLE | g/g | - | - | 0.473 |
| constant | cCO2A | Ambient CO2 concentration | DOUBLE | micromol mol-1 | - | - | 350.0 |
| constant | cCOEFR | Factor for change in radiation | DOUBLE | 1 | - | - | 1.0 |
| constant | cCOEFT | Increment of temperature | DOUBLE | °C | - | - | 0.0 |
| constant | cCOEFV | Factor for change in vapour pressure | DOUBLE | 1 | - | - | 1.0 |
| constant | cCOSLD | Amplitude of sine of solar height | DOUBLE | 1 | - | - | 0.0 |
| constant | cCX | Factor for final N concentration of seed fill | DOUBLE | 1 | - | - | 1.0 |
| constant | cCropAvailWaterInitial | - | DOUBLE | - | - | 15.0 | |
| constant | cDAYL | Astronomic daylength | DOUBLE | h | - | - | 0.0 |
| constant | cDDLP | Photoperiodic daylength | DOUBLE | h | - | - | 0.0 |
| constant | cDETER | Crop type (true determinate crops, false for indeterminate crops) | BOOLEAN | 1 | - | - | false |
| constant | cDSINBE | Daily total of effective solar height | DOUBLE | s/d | - | - | 0.0 |
| constant | cEAJMAX | Energy of activation for maximum rate of electron transport through photosystem II (JMAX) | DOUBLE | J/mol | - | - | 48041.88 |
| constant | cEG | Efficiency of germination | DOUBLE | g/g | - | - | 0.35 |
| constant | cEPSP | development stage for end of photoperiod-sensitive phase | DOUBLE | 1 | - | - | 0.7 |
| constant | cESDI | development stage for end of seed-number determining period for indeterminate crops | DOUBLE | 1 | - | - | 1.35 |
| constant | cFCRSH | Initial fraction of C in the shoot | DOUBLE | g/g | - | - | 0.5 |
| constant | cFFAT | Fraction of fat in the storage organs | DOUBLE | g/g | - | - | 0.02 |
| constant | cFLIG | Fraction of lignin in the storage organs | DOUBLE | g/g | - | - | 0.06 |
| constant | cFMIN | Fraction of minerals in the storage organs | DOUBLE | g/g | - | - | 0.03 |
| constant | cFNRSH | Initial fraction of N in the shoot | DOUBLE | g/g | - | - | 0.63 |
| constant | cFOAC | Fraction of organic acids in the storage organs | DOUBLE | g/g | - | - | 0.04 |
| constant | cHTMX | Maximum plant height | DOUBLE | m | - | - | 0.7054 |
| constant | cLEGUME | Crop type (true for leguminous crops, false for non-leguminous crops) | BOOLEAN | 1 | - | - | false |
| constant | cLNCI | Initial N concentration in living leaves (LNC) (or actual N concentration in living shoot (HNC)) | DOUBLE | g/g | - | - | 0.055 |
| constant | cLODGE | Lodging (true for cases with lodging, false for cases without lodging) | BOOLEAN | 1 | - | - | false |
| constant | cLWIDTH | Leaf width | DOUBLE | m | - | - | 0.025 |
| constant | cMTDR | Minimum thermal days for reproductive (seed fill) phase | DOUBLE | d | - | - | 23.0889 |
| constant | cMTDV | Minimum thermal days for vegetative growth phase | DOUBLE | d | - | - | 34.7627 |
| constant | cMaturityDS | Development stage of maturity | DOUBLE | 1 | - | - | 2.0 |
| constant | cMilkripenessDS | Development stage of milk ripeness | DOUBLE | 1 | - | - | 1.3 |
| constant | cNPL | Plant density per m2 | DOUBLE | 1 | - | - | 60.0 |
| constant | cNSWI | Switch variable for N supply for crop: false=user defined (NINPA, NINPN); true=simulated | BOOLEAN | 1 | - | - | false |
| constant | cNUPTX | maximum crop N uptake | DOUBLE | g/(m2 d) | - | - | 0.65 |
| constant | cPMEH | fraction of sigmoid curve inflexion in entire plant height growth period | DOUBLE | 1 | - | - | 0.8 |
| constant | cPMES | fraction of sigmoid curve inflexion in entire seed growth period | DOUBLE | 1 | - | - | 0.5 |
| constant | cPNLS | Fraction of dead leaf N incorporated into soil litter N | DOUBLE | 1 | - | - | 1.0 |
| constant | cPNPRE | Proportion of seed N that comes from non-structural N in vegetative organs accumulated before end of seed-number detemrining period | DOUBLE | 1 | - | - | 0.7 |
| constant | cPSEN | Photoperiod sensitivity of phenological development | DOUBLE | h-1 | - | - | 0.0 |
| constant | cRDMX | Maximum rooting depth | DOUBLE | cm | - | - | 100.0 |
| constant | cRNCMIN | Minimum N concentration in the roots | DOUBLE | g/g | - | - | 0.005 |
| constant | cRSS | Soil resistance for water vapour transfer, equivalent to leaf stomatal resistance | DOUBLE | second-time_per_metre | - | - | 100.0 |
| constant | cSC | Solar constant | DOUBLE | J/(m2 s) | - | - | 0.0 |
| constant | cSD1 | Thickness of upper evaporative soil layer | DOUBLE | cm | - | - | 5.0 |
| constant | cSEEDNC | Standard seed (storage organ) N concentration | DOUBLE | g/g | - | - | 0.04625 |
| constant | cSEEDW | Single seed weight | DOUBLE | g | - | - | 0.2148 |
| constant | cSINLD | Seasonal offset of sine of solar height | DOUBLE | 1 | - | - | 0.0 |
| constant | cSLA0 | Specific leaf area constant | DOUBLE | m2/g | - | - | 0.0333 |
| constant | cSLNMIN | Minimum or base specific leaf N concentration (SLN) for photosynthesis | DOUBLE | g/m2 | - | - | 0.5 |
| constant | cSLP | Crop type (true for short-day crops, false for long-day crops) | BOOLEAN | 1 | - | - | false |
| constant | cSPSP | development stage for start of photoperiod-sensitive phase | DOUBLE | 1 | - | - | 0.2 |
| constant | cSTEMNC | Nitrogen concentration in the stem | DOUBLE | g/g | - | - | 0.015 |
| constant | cTBD | Base temperature for phenology | DOUBLE | °C | - | - | 0.0 |
| constant | cTCD | Ceiling temperature for phenology | DOUBLE | °C | - | - | 36.0 |
| constant | cTCP | Time constant | DOUBLE | d | - | - | 1.0 |
| constant | cTHETA | convexity for light response of electron transport (J2) in photosynthesis | DOUBLE | 1 | - | - | 0.7 |
| constant | cTM | Development stage when transition from CB to CX is fastest | DOUBLE | 1 | - | - | 1.5 |
| constant | cTOD | Optimum temperature for phenology | DOUBLE | °C | - | - | 27.6 |
| constant | cTSEN | curvature for temperature response | DOUBLE | 1 | - | - | 0.409 |
| constant | cWRB | critical root weight density | DOUBLE | g m-2 cm-1 | - | - | 0.25 |
| constant | cWSWI | Switch variable for water supply for crop: false=user defined (WINPUT); true=simulated | BOOLEAN | 1 | - | - | false |
| constant | cXJN | slope of linear relationship between maximum rate of electron transport through photosystem II (JMAX) and leaf N | DOUBLE | micromole s-1 g-1 | - | - | 124.0 |
| constant | cXVN | slope of linear relationship between maximum rate of Rubisco-limited carboxylation (VCMX) and leaf N | DOUBLE | micromole s-1 g-1 | - | - | 62.0 |
| constant | cYGV | Growth efficiency for vegetative organs (i.e roots, stems, leaves) | DOUBLE | g/g | - | - | 0.8 |
| input | iDWSUP | Daily water supply for evapotranspiration | DOUBLE | mm/d | - | - | 0.0 |
| input | iDoHarvest | Trigger for harvesting | BOOLEAN | 1 | - | - | false |
| input | iDoSow | Trigger for sowing | BOOLEAN | 1 | - | - | false |
| input | iNSUPA | Ammonium-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iNSUPN | Nitrate-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iRDD | Daily global radiation | DOUBLE | J/(m2 d) | - | - | 0.0 |
| input | iTMMN | Daily minimum temperature | DOUBLE | °C | - | - | 0.0 |
| input | iTMMX | Daily maximum temperature | DOUBLE | °C | - | - | 0.0 |
| input | iVP | Air vapour pressure | DOUBLE | kPa | - | - | 0.0 |
| input | iWCUL | Water content of the upper soil layer | DOUBLE | http://www.wurvoc.org/vocabularies/om-1.8/cubic_metre_per_cubic_metre | - | - | 0.0 |
| input | iWN | Wind speed | DOUBLE | m/s | - | - | 0.0 |
| state | sCLV | Amount of C in the living leaves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCLVD | Amount of C in dead leaves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCLVDS | Amount of C in dead leaves that have become litter in the soil | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCRTD | Amount of C in dead roots | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCRVR | Amount of C in root reserves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCRVS | Amount of C in stem reserves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCSO | Amount of carbon in storage organs | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCSRT | Amount of carbon in structural roots | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCSST | Amount of carbon in structural stems | DOUBLE | g/m2 | - | - | 0.0 |
| state | sCTDU | Cumulative thermal-day unit | DOUBLE | d | - | - | 0.0 |
| state | sDCDSR | Shortfall of C demand for seed fill in previous time steps | DOUBLE | g/m2 | - | - | 0.0 |
| state | sDCDTP | C demand for structural stem growth at the previous time step | DOUBLE | g/(m2 d) | - | - | 0.0 |
| state | sDCDTR | Shortfall of C demand for structural stems in previous time steps | DOUBLE | g/m2 | - | - | 0.0 |
| state | sDS | Development stage | DOUBLE | 1 | - | - | 0.0 |
| state | sHT | Plant height | DOUBLE | m | - | - | 0.0 |
| state | sLAIC | Carbon-determined LAI | DOUBLE | m2/m2 | - | - | 0.0 |
| state | sLITNT | Total litter N entering the soil (LITN) during crop growth | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNDEMP | Crop N demand (NDEM) of the previous time step | DOUBLE | g/(m2 d) | - | - | 0.0 |
| state | sNFIXR | Reserve pool of symbiotically fixed nitrogen | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNFIXT | Total symbiotically fixed nitrogen during growth | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNLV | Nitrogen in living leaves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNLVD | Nitrogen in dead leaves | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNREOE | Estimated vegetative-organ N remobilizable for seed growth (NRES) accumulated till the end of seed-number determining period | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNREOF | Estimated vegetative-organ N remobilizable for seed growth (NRES) accumulated till the moment at which seed fill starts | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNRT | Nitrogen in living roots | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNRTD | Nitrogen in dead roots | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNSO | Nitrogen in storage organs | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNST | Nitrogen content in stems (including structural stem and reserves) | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNSUPP | N supply to crop (NSUP) for the previous time step | DOUBLE | g/(m2 d) | - | - | 0.0 |
| state | sRD | Rooting depth to the soil | DOUBLE | cm | - | - | 0.0 |
| state | sRMUL | Total of respiratory costs of nitrate-N uptake (RMUN) + respiratory costs of ammonium-N uptake (RMUA) + respiratory costs of ash (minerals) uptake (RMUS) + respiration due to phloem loading of C assimilates to roots (RMLD) | DOUBLE | g/(m2 d) | - | - | 0.0 |
| state | sSLNB | specific leaf N constant (SLN) in bottom leaves of canopy | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTDAPAR | Total PAR absorbed by the canopy during growth | DOUBLE | J/m2 | - | - | 0.0 |
| state | sTNLV | Total leaf N (including N in senesced leaves) | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTNUPT | Total crop N uptake during growth | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTPCAN | Cumulative canopy photosynthesis over growth period | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTRESP | Total crop respiratory cost during growth | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTSOIL | Soil temperature | DOUBLE | °C | - | - | 0.0 |
| state | sTTCAN | Cumulative canopy transpiration | DOUBLE | mm | - | - | 0.0 |
| rate | rDeadLeaves | Rate of dead leaves | DOUBLE | g/(m2 d) | -200.0 | 200.0 | 0.0 |
| rate | rDeadStems | Rate of dead stems | DOUBLE | g/(m2 d) | -200.0 | 200.0 | 0.0 |
| AESOIL | Actual soil evaporation | DOUBLE | mm/d | null | |||
| APCAN | Actual gross canopy photosynthesis | DOUBLE | g/(m2 d) | null | |||
| APCANN | Actual standing canopy CO2 assimilation (APCANS) with small plant-N increment | DOUBLE | g/(m2 d) | null | |||
| APCANS | Actual standing-canopy CO2 assimilation | DOUBLE | g/(m2 d) | null | |||
| ATCAN | Actual canopy transpiration | DOUBLE | mm/d | null | |||
| AboveGroundBiomass | Above ground biomass | DOUBLE | g/m2 | null | |||
| AnthesisDOY | DOY of Anthesis | INT | 1 | null | |||
| AnthesisDate | Date of Anthesis | DATE | 1 | null | |||
| CCHK | Difference between C added to the crop since initialization and net total of integrated C fluxes, relative to C in the crop accumulated since start of simulation (CCHKIN) | DOUBLE | % | null | |||
| DAPAR | Daily photosynthetically active radiation (PAR) absorbed by crop canopy | DOUBLE | J/(m2 d) | null | |||
| DIFS | Daytime average soil-air temperature difference | DOUBLE | °C | null | |||
| DIFSH | Daytime average shaded leaf-air temperature difference | DOUBLE | °C | null | |||
| DIFSU | Daytime average sunlit leaf-air temperature difference | DOUBLE | °C | null | |||
| EmergenceDOY | DOY of Emergence | INT | 1 | null | |||
| EmergenceDate | Date of Emergence | DATE | 1 | null | |||
| GrowingPeriod | Counter that is incremented on harvest - can be used for crop rotation | INT | 1 | null | |||
| HI | Harvest index | DOUBLE | g/g | null | |||
| IsAnthesis | true if Anthesis occurs | BOOLEAN | 1 | null | |||
| IsEmergence | true if Emergence occurs | BOOLEAN | 1 | null | |||
| IsMaturity | true if maturity occurs | BOOLEAN | 1 | null | |||
| IsMilkripeness | true if milkripeness occurs | BOOLEAN | 1 | null | |||
| IsPhenologyEvent | true if sowing/emergence/anthesis/maturity occurs | BOOLEAN | 1 | null | |||
| IsSowing | true if Sowing occurs | BOOLEAN | 1 | null | |||
| LAI | Leaf area index | DOUBLE | m2/m2 | null | |||
| LAIN | N-Leaf area index | DOUBLE | m2/m2 | null | |||
| LITC | Litter carbon entering the soil | DOUBLE | g/(m2 d) | null | |||
| LITN | Litter nitrogen entering the soil | DOUBLE | g/(m2 d) | null | |||
| MaturityDOY | DOY of Maturity | INT | 1 | null | |||
| MaturityDate | Date of Maturity | DATE | 1 | null | |||
| MilkripenessDOY | DOY of Maturity | INT | 1 | null | |||
| MilkripenessDate | Date of milk ripeness | DATE | 1 | null | |||
| NCHK | Difference between N added to the crop since initialization and total of integrated N fluxes, relative to total crop N uptake during growth (TNUPT) | DOUBLE | % | null | |||
| NDEM | Crop N demand (NDEM) of the previous time step | DOUBLE | g/(m2 d) | null | |||
| NUPTA | Ammonium-N uptake by the crop | DOUBLE | g/(m2 d) | null | |||
| NUPTN | Nitrate-N uptake by the crop | DOUBLE | g/(m2 d) | null | |||
| PESOIL | Potential soil evaporation | DOUBLE | mm/s | null | |||
| PPCAN | Potential canopy CO2 assimilation | DOUBLE | g/(m2 d) | null | |||
| PSO | Protein content in storage organs | DOUBLE | g/m2 | null | |||
| PTCAN | Potential daily canopy transpiration | DOUBLE | mm/d | null | |||
| PotentialEvapoTranspiration | Potential evapotranspiration | DOUBLE | mm/d | null | |||
| RRD | Rate of change in rooting depth of the soil | DOUBLE | cm/d | null | |||
| RWRT | rate of change in dry weight of living roots | DOUBLE | g/(m2 d) | null | |||
| SLA | Specific leaf area | DOUBLE | m2/g | null | |||
| SLN | N-Leaf area index | DOUBLE | m2/m2 | null | |||
| SLNT | N-Leaf area index | DOUBLE | m2/m2 | null | |||
| SowingDOY | DOY of Sowing | INT | 1 | null | |||
| SowingDate | Date of Sowing | DATE | 1 | null | |||
| TAVSS | Daily average temperature at the soil surface | DOUBLE | °C | null | |||
| WLV | Dry weight of living leaves | DOUBLE | g/m2 | null | |||
| WLVD | Dry weight of dead leaves | DOUBLE | g/m2 | null | |||
| WRT | Dry weight of living roots | DOUBLE | g/m2 | null | |||
| WRTD | Dry weight of dead roots | DOUBLE | g/m2 | null | |||
| WSH | Dry weight of living shoot (above-ground) organs | DOUBLE | g/m2 | null | |||
| WSHH | Dry weight of shoot organs (excluding shedded leaves) | DOUBLE | g/m2 | null | |||
| WSO | Dry weight of storage organs | DOUBLE | g/m2 | null | |||
| WST | Dry weight of stems | DOUBLE | g/m2 | null | |||
| WTOT | Dry weight of total living organs | DOUBLE | g/m2 | null |