Start | Index | Overview • PREV | UP | Consult reference for description of algorithms.
This module calculates only the water balance part. For biomass producution there is the complementary module GecrosCrop. 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 | cBHC | Initial value for microbial biomass in the soil and humified organic matter in the soil (BIO + HUM) | DOUBLE | g/m2 | - | - | 3500.0 |
| constant | cBIOR | Decomposition rate constant for microbial biomass in the soil (BIO) | DOUBLE | a-1 | - | - | 0.66 |
| constant | cCLAY | Percentage of clay in the soil | DOUBLE | % | - | - | 23.4 |
| constant | cDPMI | Initial value of decomposable plant material (DPM) | DOUBLE | g/m2 | - | - | 0.0 |
| constant | cDPMR0 | Standard value for decomposition rate constant (DPMR) for decomposable plant material (DPM) | DOUBLE | a-1 | - | - | 10.0 |
| constant | cDRPM | Ratio decomposable plant material/resistant plant material (DPM/RPM) of added plant material | DOUBLE | 1 | - | - | 1.44 |
| constant | cFBIOC | Fraction of initial value for for micobial biomass in the soil (BIOI) in initial total soil organic carbon (TOC) | DOUBLE | 1 | - | - | 0.03 |
| constant | cHUMR | Decomposition rate constant for humified organic matter in the soil (HUM) | DOUBLE | a-1 | - | - | 0.02 |
| constant | cMULTF | Multiplication factor for initial soil water status | DOUBLE | 1 | - | - | 1.0 |
| constant | cNAI | Initial ammonium-N in the soil | DOUBLE | g/m2 | - | - | 0.0 |
| constant | cNNI | Initial nitrate-N in the soil | DOUBLE | g/m2 | - | - | 0.0 |
| constant | cNSWI | Switch variable for N supply for crop: false=user defined (NINPA, NINPN); true=simulated | BOOLEAN | 1 | - | - | false |
| constant | cRA | Residual ammonium-N in the soil | DOUBLE | g/m2 | - | - | 1.0 |
| constant | cRN | Residual nitrate-N in the soil | DOUBLE | g/m2 | - | - | 1.0 |
| constant | cRPMR0 | Standard value for decompostion rate constant (RPMR) for resistant plant material (RPM) | DOUBLE | a-1 | - | - | 0.3 |
| constant | cSD1 | Thickness of upper evaporative soil layer | DOUBLE | cm | - | - | 5.0 |
| constant | cTCP | Time Constant | DOUBLE | d | - | - | 1.0 |
| constant | cTCT | Time constant for soil temperature dynamics | DOUBLE | d | - | - | 4.0 |
| constant | cTOC | Total organic C in the soil | DOUBLE | g/m2 | - | - | 7193.0 |
| constant | cTSOILI | Initial soil temperature | DOUBLE | °C | - | - | 0.0 |
| constant | cWCFC | Soil water content in field capacity | DOUBLE | m3/m3 | - | - | 0.25 |
| constant | cWCMAX | Soil water content at maximum water holding capacity | DOUBLE | m3/m3 | - | - | 0.35 |
| constant | cWCMIN | Minimum soil water content | DOUBLE | m3/m3 | - | - | 0.05 |
| constant | cWSWI | Switch variable for water supply for crop: false=user defined (WINPUT); true=simulated | BOOLEAN | 1 | - | - | false |
| input | iActualSoilEvaporation | Actual soil evaporation (AESOIL) | DOUBLE | mm/d | - | - | 0.0 |
| input | iActualTranspiration | Actual canopy transpiration (ATCAN) | DOUBLE | mm/d | - | - | 0.0 |
| input | iDoHarvest | Trigger for harvesting | BOOLEAN | 1 | - | - | false |
| input | iDoSow | Trigger for sowing | BOOLEAN | 1 | - | - | false |
| input | iFERNA | Ammonium-N application rate | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iFERNN | Nitrate-N application rate | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iIRRI | Rate of water added by irrigation | DOUBLE | mm/d | - | - | 0.0 |
| input | iLITC | Litter carbon entering the soil | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iLITN | Litter nitrogen entering the soil | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iNINPA | User-defined ammonium-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iNINPN | User-defined nitrate-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iNUPTA | Ammonium-N uptake by the crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iNUPTN | Nitrate-N uptake by the crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| input | iRAIN | Precipitation | DOUBLE | mm | - | - | 0.0 |
| input | iRD | Rooting depth to the soil | DOUBLE | cm | - | - | 0.0 |
| input | iRRD | Rate of change in rooting depth of the soil | DOUBLE | cm/d | - | - | 0.0 |
| input | iTAVSS | Daily average temperature at the soil surface | DOUBLE | °C | - | - | 0.0 |
| input | iWINPUT | User-defined water supply to crop | DOUBLE | mm/d | - | - | 0.0 |
| state | sBIO | Microbial biomass in the soil | DOUBLE | g/m2 | - | - | 0.0 |
| state | sDPM | Decomposable plant material | DOUBLE | g/m2 | - | - | 0.0 |
| state | sDPN | Organic N in DPM | DOUBLE | g/m2 | - | - | 0.0 |
| state | sHUM | Humified organic matter in soil | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNALL | Ammonium-N in the lower soil layer | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNAUL | Ammonium-N in the upper soil layer | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNNLL | Nitrate-N in the lower soil layer | DOUBLE | g/m2 | - | - | 0.0 |
| state | sNNUL | Nitrate-N in the upper soil layer | DOUBLE | g/m2 | - | - | 0.0 |
| state | sRPM | Resistant plant material (difficult to decompose) | DOUBLE | g/m2 | - | - | 0.0 |
| state | sRPN | Organic N in resistant plant material (RPM) | DOUBLE | g/m2 | - | - | 0.0 |
| state | sSFERNA | NH4-N fertilizer susceptible to volatilization | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTNLEA | Total nitrate-N leached to groundwater | DOUBLE | g/m2 | - | - | 0.0 |
| state | sTSOIL | Soil temperature | DOUBLE | °C | - | - | 0.0 |
| state | sWLL | Water content in the lower soil layer | DOUBLE | mm | - | - | 0.0 |
| state | sWUL | Water content of the upper soil layer | DOUBLE | mm | - | - | 0.0 |
| out | DWSUP | Daily water supply for evapotranspiration | DOUBLE | mm/d | - | - | 0.0 |
| out | NMINER | Mineral N in the soil | DOUBLE | g/m2 | - | - | 0.0 |
| out | NSUPA | Ammonium-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| out | NSUPN | Nitrate-N supply to crop | DOUBLE | g/(m2 d) | - | - | 0.0 |
| out | WCUL | Water content of the upper soil layer | DOUBLE | http://www.wurvoc.org/vocabularies/om-1.8/cubic_metre_per_cubic_metre | - | - | 0.0 |