The use of energy for soil tillage by the implements with active working elements

The use of energy for soil tillage by the implements with active working elements was determined on a loam soil of optimal moisture. From the measurement of pulling force, torque on drive wheels; torque of P.T.O., passage with and without slippage on driving wheels the necessary pulling power, the necessary power on P.T.O., the power necessary for the control of slippage rolling resistance and the slippage were calculated At the work with rotary harrow on the ploughed soil the greater part of engaged power, 63,8% of power is used for driving, 28,5 for pulling and 7,7% for the control of tractor rolling resistance. Rotary tiller on the ploughed soil engages 85,2% of power for diriving and 14,8% for the control of the tractor rolling resistance and drive-wheel slippage while at the use on unploughed soil 71,838 kW power is engaged, however, also a negative draft is observed, 24,8 kW power is returned from rotary tiller to tractor. The use of energy per volume unit of tilled soil (specific work) was from 238 to 276 kJ/m(3).