According to the research of Nidal: from 15-25 DEG C, disc plough in the earth,traction with increasing longevity plate angle measured and vertical force also increased. However, to reduce the measured lateral force. Prediction of the threeforce changes with speed and angle by using the finite element method, the three-dimensional finite element simulation results and experimental results of basicconsistent.

In the Malay Archipelago, in the Serdang sand, Kheiralla speed and depth for the fourtraction model Jian Hua plough, disc plough and harrow based on. Application of orthogonal regression procedures, from the fuel consumption rate and energy ratioon look, disc harrow is the most energy-efficient, energy-saving effect of rotary turningmachine, disc plough and harrow the same. These results obtained are mountain field experiment.

Godwin has developed a soil mechanical traction power prediction software. The mountain the model to determine the traction force and wheel angular scanning a.Results show that, with the increase of the scanning angle, increase traction. The model was also used in Hua plough and chisel plow. The study was conducted atCranfield University in Britain.

Conducted a survey of Sahu R. K. in India (2006) with 0.3 meters in diameter of thedisc harrow in three different depth (0.05, 0.075 and 0.1 M), four kinds of speed (1.2,2.2, 3.2 and 4.2 km/h), to observe the effect of traction power required, using orthogonal multiple regression method, the equipment required by experimental formula of gravity, and developed the model machine, at the same time, other studies show, traction with the speed and the depth increasing.