Analysis of Moldboard Plowing Performance Parameters Effect on Driving Wheels Slip, Draft and Traction Efficiency

The most effective wayto optimize traction performance of attractor is creation of proper coordination between power, load on driving wheels, forward speed and draft of implements with wheels slip. In this study, the effects of speed and depth of plowing on slip, draft force and traction efficiency of ITM299 tractor were measured. In this regards, drawbar pull, rolling resistance and slip of driving wheels has directly been measured. Field tests were done on clay soil with 14% constant moisture content(based on dry weight), performed in a randomized complete blocks design with factorial effects of two levels of tillage depth (20 and 30 cm) and three levels of forward speed (3, 4.5 and 6 km/h). According to the results of experimental tests, increase in forward speed and tillage depth lead to increase in drawbar pull. However, increase in tillage depth or reduce in forward speedleadto increase in drive wheels slip. Interaction effect of tillage depth and speed on draft and tractor wheels slip was insignificant. The most effective parameter on traction ratio was forward speed. So that the maximum traction ratio (80.82%) occurred with the average tillage depth and maximum speed and withtheslip of 10.5%.