The currently used operations of preparing the soil for sowing account for a significant share of the energy and labor spent on all field work in agriculture. Studies of scientists from different countries have established that from the point of view of agricultural technology, it is permissible to combine basic and pre-sowing tillage: preparation of the seedbed and fertilization, loosening, rolling and other operations of preparing the soil for sowing. Therefore, the correct choice of the technological scheme for the placement of working bodies and operating modes of the unit in conditions of moisture deficiency and erosion hazard is an urgent task. The paper presents the results of a study of an experimental combined tillage machine concerning the effect of speed on the change in the unevenness of traction resistance.