* * * only call for winter temperate cereal * * *
subroutine calculates vernalization and photoperiod effects on gdd accumulation in winter temperate cereal varieties. Thermal time accumulation is reduced in 1st period until plant is fully vernalized. During this time of emergence to spikelet formation, photoperiod can also have a drastic effect on plant development.
implicit none integer, intent(in) :: p ! PFT index running overREVISION HISTORY:
Created by Sam Levis from AGROIBIS