A non matched tractor power with the implement causes many disadvantages, which affect operation performance. To operate tractors more efficiently with agricultural implement; it is good to accomplish more work with less time and fuel. The drawbar power needed for operating chisel and moldboard plows was determined through the theoretical and experimental studies. The experimental study was carried out in Meet El Deeba Rice Mechanization Center, Kafr El-Sheikh Governorate, the soil is classified as a clay soil. The predicted power obtained for operating the moldboard plow which resulted from the theoretical analysis was very close to that obtained experimentally, and both agreed with that calculated from fuel consumption and equations published in ASABE, 2006 for chisel plow. Predicted drawbar power for operating the chisel plow was approximately 26% more than the drawbar power which is obtained from the experimental work at plowing speed of 3.2 km.h^-1. Increasing speed to 6.91 km.h^-1 increased prediction power by only 3.63% compared with the experimentally results. Otherwise the prediction drawbar power for operating the moldboard plow was approximately 1.91% more than that obtained from the experimental at plowing speed of 3.2 km.h^-1. Increasing speed to 5.83 km.h^-1 decreased prediction power by 11.38%. The theoretical specific power (W.cm^-2) increased by 115.77% as the theoretical plowing speed increased from 3.2 to 6.91 km.h^-1 in case of using chisel plow. And increased by 81.54% as the plowing speed increased from 3.2 to 5.83 km.h^-1 in case of using the moldboard plow.