Creating a Crop¶
Every crop has a predefined set of parameters that need to be included. See the table below for information on these parameters. For the blank template to make a crop, see Crop Template.
Crop Parameters¶
WOFOST Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
CVL |
Conversion factor for assimilates to leaves |
SCr |
|
CVO |
Conversion factor for assimilates to storage organs |
SCr |
|
CVR |
Conversion factor for assimilates to roots |
SCr |
|
CVS |
Conversion factor for assimilates to stems |
SCr |
Assimilation Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
AMAXTB |
Max leaf CO2 assimilation rate as a function of DVS |
TCr |
kg ha-1 hr-1 |
EFFTB |
Light use efficiency of single leaf as a function of daily mean temperature |
TCr |
kg ha-1 hr-1 /(J m-2 s-1)| |
KDIFTB |
Extinction coefficient for diffuse visible as function of DVS |
TCr |
|
TMPFTB |
Reduction factor of AMAX as function of daily mean temperature |
TCr |
|
TNPFTB |
Reduction factor of AMAX as function of daily minimum temperature |
TCr |
|
CO2AMAXTB |
|
TCr |
|
CO2EFFTB |
Correction factor for EFF given atmospheric CO2 concentration |
TCr |
|
CO2 |
Atmospheric CO2 concentration |
SCr |
ppm |
Evapotranspiration Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
CFET |
Correction factor for potential transpiration rate |
S |
|
DEPNR |
|
S |
|
KDIFTB |
|
T |
|
IOX |
Switch oxygen stress on (1) or off (0) |
S |
|
IAIRDU |
Switch airducts on (1) or off (0) |
S |
|
CRAIRC |
Critical air content for root aeration |
S |
|
SM0 |
Soil porosity |
S |
|
SMW |
Volumetric soil moisture content at wilting point |
S |
|
SMFCF |
Volumetric soil moisture content at field capacity |
S |
|
CO2 |
Atmospheric CO2 concentration |
S |
ppm |
CO2TRATB |
Reduction factor for TRAMX as function of atmospheric CO2 concentration |
T |
Leaf Dynamics Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
RGRLAI |
Maximum relative increase in LAI |
SCr |
ha ha-1 d-1 |
SPAN |
Life span of leaves growing at 35°C |
SCr |
d |
TBASE |
Lower threshold temp for ageing of leaves |
SCr |
C |
PERDL |
Max relative death rate of leaves due to water stress |
SCr |
|
TDWI |
Initial total crop dry weight |
SCr |
kg ha-1 |
KDIFTB |
Extinction coefficient for diffuse visible light as function of DVS |
TCr |
|
SLATB |
Specific leaf area as a function of DVS |
TCr |
ha kg-1 |
RDRNS |
Max relative death rate of leaves due to nutrient NPK stress |
TCr |
|
NLAI |
|
TCr |
|
NSLA |
Coefficient for the effect of nutrient NPK stress on SLA reduction |
TCr |
NPK Dynamics Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
NMAXLV_TB |
Maximum N concentration in leaves as function of dvs |
kg N kg-1 dry biomass |
|
PMAXLV_TB |
Maximum P concentration in leaves as function of dvs |
kg P kg-1 dry biomass |
|
KMAXLV_TB |
Maximum K concentration in leaves as function of dvs |
kg K kg-1 dry biomass |
|
NMAXRT_FR |
|
||
PMAXRT_FR |
Maximum P concentration in roots as fraction of maximum P concentration in leaves |
||
KMAXRT_FR |
Maximum K concentration in roots as fraction of maximum K concentration in leaves |
||
NMAXST_FR |
Maximum N concentration in stems as fraction of maximum N concentration in leaves |
||
PMAXST_FR |
Maximum P concentration in stems as fraction of maximum P concentration in leaves |
||
KMAXST_FR |
Maximum K concentration in stems as fraction of maximum K concentration in leaves |
||
NRESIDLV |
Residual N fraction in leaves |
kg N kg-1 dry biomass |
|
PRESIDLV |
Residual P fraction in leaves |
kg P kg-1 dry biomass |
|
KRESIDLV |
Residual K fraction in leaves |
kg K kg-1 dry biomass |
|
NRESIDRT |
Residual N fraction in roots |
kg N kg-1 dry biomass |
|
PRESIDRT |
Residual P fraction in roots |
kg P kg-1 dry biomass |
|
KRESIDRT |
Residual K fraction in roots |
kg K kg-1 dry biomass |
|
NRESIDST |
Residual N fraction in stems |
kg N kg-1 dry biomass |
|
PRESIDST |
Residual P fraction in stems |
kg P kg-1 dry biomass |
|
KRESIDST |
Residual K fraction in stems |
kg K kg-1 dry biomass |
Partitioning Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
FRTB |
Partitioning to roots as a function of development stage |
TCr |
|
FSTB |
Partitioning to stems as a function of development stage |
TCr |
|
FLTB |
Partitioning to leaves as a function of development stage |
TCr |
|
FOTB |
|
TCr |
|
NPART |
Coefficient for the effect of N stress on leaf biomass allocation |
SCr |
|
NTHRESH |
Threshold above which surface nitrogen induces stress |
TCr |
kg ha-1 |
PTHRESH |
Threshold above which surface phosphorous induces stress |
TCr |
kg ha-1 |
KTHRESH |
Threshold above which surface potassium induces stress |
TCr |
kg ha-1 |
Vernalization Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
VERNSAT |
Saturated vernalisation requirements |
SCr |
days |
VERNBASE |
Base vernalisation requirements |
SCr |
days |
VERNRTB |
|
TCr |
|
VERNDVS |
Critical development stage after which the effect of vernalisation is halted |
SCr |
Phenology Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
DTBEM |
Consecutive days required above temperature for germination |
SCr |
day |
TSUMEM |
Temperature sum from sowing to emergence |
SCr |
C day |
TBASEM |
Base temperature for emergence |
SCr |
C |
TEFFMX |
Maximum effective temperature for emergence |
SCr |
C |
TSUM1 |
Temperature sum from emergence to anthesis |
SCr |
C day |
TSUM2 |
Temperature sum from anthesis to maturity |
SCr |
C day |
TSUM3 |
Temperature sum from maturity to death |
SCr |
C day |
IDSL |
Switch for phenological development options |
SCr |
|
DLO |
Optimal daylength for phenological development |
SCr |
hr |
DLC |
Critical daylength for phenological development |
SCr |
hr |
DVSI |
Initial development stage at emergence |
SCr |
|
DVSM |
Mature development stage, usually 2.0 |
SCr |
|
DVSEND |
Final development stage |
SCr |
|
DTSMTB |
Daily increase in temperature sum as a function of daily mean temperature |
TCr |
C |
DORM |
Dormancy threshold after which the plant enters dormancy |
SCr |
day |
DORMCD |
The number of days a plant will stay dormant |
SCr |
day |
AGEI |
The initial age of the crop in years |
SCr |
year |
Respiration Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
Q10 |
Relative increase in maintenance respiration rate with each 10 degrees increase in temperature |
SCr |
|
RMR |
Relative maintenance respiration rate for roots |
SCr |
kg CH2O kg-1 d-1 |
RMS |
Relative maintenance respiration rate for stems |
SCr |
kg CH2O kg-1 d-1 |
RML |
Relative maintenance respiration rate for leaves |
SCr |
kg CH2O kg-1 d-1 |
RMO |
Relative maintenance respiration rate for storage organs |
SCr |
kg CH2O kg-1 d-1 |
Root Dynamics Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
RDI |
Initial rooting depth |
SCr |
cm |
RRI |
Daily increase in rooting depth |
SCr |
cm day-1 |
RDMCR |
Maximum rooting depth of the crop |
SCR |
cm |
RDMSOL |
Maximum rooting depth of the soil |
SSo |
cm |
TDWI |
Initial total crop dry weight |
SCr |
kg ha-1 |
IAIRDU |
Presence of air ducts in the root (1) or not (0) |
SCr |
|
RDRRTB |
|
TCr |
|
RDRROS |
Relative death rate of roots as a function of oxygen stress TCr |
||
RDRRNPK |
Relative rate of root death due to NPK excess |
SCr |
|
Stem Dynamics Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
TDWI |
Initial total crop dry weight |
SCr |
kg ha-1 |
RDRSTB |
Relative death rate of stems as a function of development stage |
TCr |
|
SSATB |
Specific Stem Area as a function of development stage |
TCr |
ha kg-1 |
Storage Organ Dynamics Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
TDWI |
Initial total crop dry weight |
SCr |
kg ha-1 |
RDRSOB |
Relative Death rate of storage organs as a function of development stage |
Scr |
kg ha-1 |
SPA |
Specific Pod Area |
SCr |
ha kg-1 |
RDRSOB |
Relative Death rate of storage organs as a function of frost kill |
Scr |
kg ha-1 |
NPK Demand Uptake Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
NMAXLV_TB |
Maximum N concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
PMAXLV_TB |
Maximum P concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
KMAXLV_TB |
Maximum K concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
NMAXRT_FR |
|
||
PMAXRT_FR |
Maximum P concentration in roots as fraction of maximum P concentration in leaves |
||
KMAXRT_FR |
Maximum K concentration in roots as fraction of maximum K concentration in leaves |
||
NMAXST_FR |
Maximum N concentration in stems as fraction of maximum N concentration in leaves |
||
PMAXST_FR |
Maximum P concentration in stems as fraction of maximum P concentration in leaves |
||
KMAXST_FR |
Maximum K concentration in stems as fraction of maximum K concentration in leaves |
||
NMAXSO |
Maximum N concentration in storage organs |
kg N kg-1 dry biomass |
|
PMAXSO |
Maximum P concentration in storage organs |
kg N kg-1 dry biomass |
|
KMAXSO |
Maximum K concentration in storage organs |
kg N kg-1 dry biomass |
|
NCRIT_FR |
Critical N concentration as fraction of maximum N concentration for vegetative plant organs (leaves + stems) |
||
PCRIT_FR |
Critical P concentration as fraction of maximum P concentration for vegetative plant organs (leaves + stems) |
||
KCRIT_FR |
Critical K concentration as fraction of maximum K concentration for vegetative plant organs (leaves + stems) |
||
TCNT |
Time coefficient for N translation to storage organs |
days |
|
TCPT |
Time coefficient for P translation to storage organs |
days |
|
TCKT |
Time coefficient for K translation to storage organs |
days |
|
NFIX_FR |
Fraction of crop nitrogen uptake by biological fixation |
kg N kg-1 dry biomass |
|
RNUPTAKEMAX |
Maximum rate of N uptake |
kg N ha-1 d-1 |
|
RPUPTAKEMAX |
Maximum rate of P uptake |
kg N ha-1 d-1 |
|
RKUPTAKEMAX |
Maximum rate of K uptake |
kg N ha-1 d-1 |
NPK Stress Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
NMAXLV_TB |
Maximum N concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
PMAXLV_TB |
Maximum P concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
KMAXLV_TB |
Maximum K concentration in leaves as function of DVS |
kg N kg-1 dry biomass |
|
NMAXRT_FR |
|
||
PMAXRT_FR |
Maximum P concentration in roots as fraction of maximum P concentration in leaves |
||
KMAXRT_FR |
Maximum K concentration in roots as fraction of maximum K concentration in leaves |
||
NMAXST_FR |
Maximum N concentration in stems as fraction of maximum N concentration in leaves |
||
PMAXST_FR |
Maximum P concentration in stems as fraction of maximum P concentration in leaves |
||
KMAXST_FR |
Maximum K concentration in stems as fraction of maximum K concentration in leaves |
||
NCRIT_FR |
Critical N concentration as fraction of maximum N concentration for vegetative plant organs (leaves + stems) |
||
PCRIT_FR |
Critical P concentration as fraction of maximum P concentration for vegetative plant organs (leaves + stems) |
||
KCRIT_FR |
Critical K concentration as fraction of maximum K concentration for vegetative plant organs (leaves + stems) |
||
NRESIDLV |
Residual N fraction in leaves |
kg N kg-1 dry biomass |
|
PRESIDLV |
Residual P fraction in leaves |
kg P kg-1 dry biomass |
|
KRESIDLV |
Residual K fraction in leaves |
kg K kg-1 dry biomass |
|
NRESIDST |
Residual N fraction in stems |
kg N kg-1 dry biomass |
|
PRESIDST |
Residual P fraction in stems |
kg P kg-1 dry biomass |
|
KRESIDST |
Residual K fraction in stems |
kg K kg-1 dry biomass |
|
NLUE_NPK |
Coefficient for the reduction of RUE due to nutrient (N-P-K) stress |
NPK Translocation Parameters¶
Name |
Description |
Type |
Unit |
|---|---|---|---|
NRESIDLV |
Residual N fraction in leaves |
kg N kg-1 dry biomass |
|
PRESIDLV |
Residual P fraction in leaves |
kg P kg-1 dry biomass |
|
KRESIDLV |
Residual K fraction in leaves |
kg K kg-1 dry biomass |
|
NRESIDST |
Residual N fraction in stems |
kg N kg-1 dry biomass |
|
PRESIDST |
Residual P fraction in stems |
kg P kg-1 dry biomass |
|
KRESIDST |
Residual K fraction in stems |
kg K kg-1 dry biomass |
|
NPK_TRANSLRT_FR |
NPK translocation from roots as a fraction of resp. total NPK amounts translocated from leaves and stems |
Crop Template¶
Download the crop template YAML file here: crop_template.yaml