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An object-oriented program in Visual C++ that calculates implement draft requirement and predicts the performance of tractor-implement system was developed to use in farm machinery management and educational and research purposes. The simulation program finds the optimum field speed that matches the pull provided by a tractor with an implement draft requirement and presents the performance parameters of the tractor-implement system. The program has been tested with databases containing information of a number of tractors and implements and has proven to be very user-friendly and efficient to meet the requirement.