Abstract: An attempt was made to establish a model for simulating the biomassproduction in rice community,emphasis being placed on the methodologyof modelling.The model consists of a main program and ten subroutines written inFORTRAN.The physiological processes of rice considered in the modelare CO₂ assimilation,dry matter distribution among plant parts,leafexpansion,tiller formation and floral initiation.The values of importantvariables of rice stand(leaf area index,shoot number,and dry weightsof plant parts)are ca...