The Agricultural Sub-Model (AGSM) optimizes the crop distribution in a district, taking into account the availability of water and land, and the relative values of various crops and costs of inputs. AGSM is a seasonal model, in which different water qualities can be taken into account.
Input data are:
the crops that can be grown in the district;
the water requirement per crop and per season;
the income generated by crop production, computed as crop yield multiplied with the crop value minus the cost of non-water inputs;
constraints on water and land availability.
If AGSM is used with the price of water given, it will compute the optimal cropping pattern taking into account the specified water- and land constraints. AGSM can also be used to derive the agricultural demand curve.
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