Rmiscanmod. BioCro 0.93

Usage

Rmiscanmod(data, RUE = 2.4, LER = 0.01, Tb = 10, k = 0.67, LAIdrd = 0.8, LAIStop = 1.8, RUEdrd = 1.3, RUEStop = 2.5, SMDdrd = -30, SMDStop = -120, FieldC = 45, iWatCont = 45, a = 6682.2, b = -0.33, soildepth = 0.6)

Arguments

data: data.frame or matrix described in details.
RUE: Radiation use efficiency (g/MJ).
LER: Leaf expansion rate LAI/GDD.
Tb: Base Temperature (Celsius).
k: extinction coefficient of light in the canopy.
LAIdrd: Leaf Area Index 'down regulation decline'.
LAIStop: Leaf Area Index 'down regulation decline' threshold .
RUEdrd: Radiation Use Efficieny 'down regulation decline'.
RUEStop: Radiation Use Efficieny 'down regulation decline' threshold.
SMDdrd: Soil Moisture Deficit 'down regulation decline'.
SMDStop: Soil Moisture Deficit 'down regulation decline' threshold.
FieldC: Soil field capacity.
iWatCont: Initial water content.
a: Soil parameter.
b: Soil parameter.
soildepth: Soil depth.

Value

returns a list

Description

Simple model to calculate crop growth and yield based on MISCANMOD (see references).

Details

The data.frame or matrix should contain

column 1: year column 2: month column 3: day column 4: JD column 5: max T (Celsius) column 6: min T (Celsius) column 7: PPFD or solar radiation divided by 2 (MJ/m2) column 8: Potential evaporation column 9: precip (mm)

References

Clifton-Brown, J. C.; Neilson, B.; Lewandowski, I. and Jones, M. B. The modelled productivity of Miscanthus x giganteus (GREEF et DEU) in Ireland. Industrial Crops and Products, 2000, 12, 97-109.

Clifton-brown, J. C.; Stampfl, P. F. and Jones, M. B. Miscanthus biomass production for energy in Europe and its potential contribution to decreasing fossil fuel carbon emissions. Global Change Biology, 2004, 10, 509-518.

Examples

## Need to get an example data set and then run it
## <strong>Not run</strong>: 
# data(WD1979)
# 
# res <- Rmiscanmod(WD1979)
# 
# ## convert to Mg/ha
# 
# Yld <- res$Yield / 100
# 
# xyplot(Yld ~ 1:365 ,
#        xlab='doy',
#        ylab='Dry biomass (Mg/ha)')
# 
# ## although the default value for Field Capacity is 45
# ## a more reasonable value is closer to 27
# 
# 
# ## <strong>End(Not run)</strong>