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Considering the fact that farmers act economically, the price level of agricultural products and their resulting income, play important roles products, selection and cropping pattern. Since farmers take into account the previous prices in their decision makings, in this study in order to analyse the effects of product prices and their variations on the cropping patterns in Khorasan
provlce, an overall and aggregate model was prepared by using MOTAD linear programming method. Besides, the effects of expected income changes on cropping patterns were studied through parametric linear programming method. The resuits indicated that the products with low price variations (i.e. wheat) were excluded from cropping pattern, when the expected income was declining. Some products that have high price variations but high yields remain in cropping patterns. So it was suggested that in order to raise the acreage and production of agricultural products, in addition to price policies, due attention must be paid to non price policies which can increase the yield.