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Resource transfer activities are also specified and include seasonal labor, machinery, credit, fertilizer and forage and for traditional farms, household consumption.
The constraints are specified to capture the regional seasonality of irrigated land, water, labor, and machinery use. Also-included, are com.modity balance equations, and zero balance constraints reflecting livestock feed activities. A set of convexity constraints also appear and correspond to the demand functions for wheat, feed grains, legumes, various irrigated crops, mutton, beef and various fruits. The most recent addition to the model has been the incorporation of Cobb-Douglas production functions for four different varieties of wheat.
Other sectors of-the economy are included exogenously in terms of the capital, credit, construction materials and other resources that they have historically supplied to the agricultural sector.
The points of view of others concerning the use of these techniques in a policy-decision making environment are presented below. III. THE PERSPECTIVE OF OTHERS ON THE ADOPTION OF ASA METHODS
The literature suggests that over the last five years some attention has been given to the problem of using ASA frameworks as an operational tool in the planning process. In an earlier paper by Atkin and Rossmiller
(1), they pointed out that sector analysis and system simulation is a "... very useful tool in the decision makers toolbox...t' but concluded that it is not a panacea to any of the policy decision makers problem.
In his 1974 paper "General Systems Stimulation Models for Sector* Analysis", Glenn Johnson (8) reflected his concern for the problem of using analytical