The use of a large-scale LP agricultural model for supporting the policy design process is presented. The model determines the agricultural crop and livestock specialization in a detailed, disaggregated form, i.e. distributed over subregions, properties, sail qualities, technologies, etc. and basic financial and material flaws, all in given natural conditions, e.g. sail qualities, and available resources, e.g. manpower, machinery, capital, etc. The policy is meant in terms of imposed price structure and resource distribution. The use of information obtainable from both primal and dual solution is shown. The results of implementation for a region in Poland are presented