A computer programme was developed to select the proper power level based on farm size, cropping patterns, cultural practices, crop yield, purchase price of machine and value of crop. The programme was designed in order to minimize the total costs. The basic management data for the selection of farm power were collected from farmers, dealers and different sources. The computations were carried out with a computer programme written in the BASIC. For 200ha land area, the power level for land preparation and farmstead operations in multicrop system was 205kW and it was 319kW for rice cultivation in all season (monocrop). The numbers of large tractors, small tractors and power tillers were determined based on the rated power of 5OkW, 30kW and 9kW, respectively. It was found that the optimum level of power varied with the size of the farmland and cropping patterns.
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