The APSIM-crop modules (wheat, barley, lupin, canola and field pea)
calculate daily biomass production based on sunlight interception
and radiation use efficiency (RUE). The standard RUE is 1.24 g MJ−1
for wheat and Barley, 1.10 g MJ−1 for field pea, 0.80 g MJ−1 for lupin
and 1.35 g MJ−1 for canola from emergence to the end of grainfilling.
The radiation induced production is modified by temperature,
nitrogen, vapour pressure deficit and soil water supply.