maize.muchow.model {ZeBook}

Maize model, with harvest index and yield from Muchow et al. (1990)

Description

Maize model, with harvest index and yield. from Muchow RC, Sinclair TR, and Bennett JM (1990). Temperature and Solar Radiation Effects on Potential Maize Yield across Locations AGRONOMY JOURNAL, VOL. 82, MARCH-APRIL 1990

Usage

maize.muchow.model(Tbase1 = 8, TTE = 87, TTS = 67, Tbase2 = 0,
  TTRUE = 500, TTM = 1150, TLN = 20, AM = 596, RUE1 = 1.6,
  RUE2 = 1.2, K = 0.4, HImax = 0.5, Population = 7, sdate = 100,
  ldate = 365, weather)

Arguments

Tbase1

: base temperature before silking(degC)

TTE

: Thermal units from sowing to emergence/leaf growth (degC.day)

TTS

: Thermal units from end of leaf growth to silking (degC.day)

Tbase2

: base temperature after silking (degC)

TTRUE

: Thermal units from silking for RUE change (degC.day)

TTM

: Thermal units from silking to physiological maturity (degC.day)

TLN

: total number of leaves initiated (-)

AM

: area of the largest leaf (cm2)

RUE1

: radiation use efficiency (g.MJ-1) from crop emergence until 500 thermal units (base 0 "C) after silking

RUE2

: radiation use efficiency (g.MJ-1) from 500 thermal units (base 0 "C) after silking

K

: radiation extinction coefficient (-)

HImax

: maximum harvest index - genetic potential (-)

Population

: number of plant per square meter (-)

sdate

: sowing date (day)

ldate

: end of simulation (day)

weather

: daily weather dataframe

Value

data.frame with TT1, TT2, STADE, LN, LAI, B, HI, YIELD

See Also

mm.A.fct, mm.LN.fct, mm.FAS.fct, maize.multisy, mm.HI.fct,maize.muchow.graph

Examples

# not run in package test
# res = maize.muchow.model(weather=maize.weather(working.year=2010, working.site=1))
#res$FinalYield