The article presents the results of experimental studies on the working organs of a disc cultivator under laboratory conditions. In the research, the method of mathematical experiment planning was used to determine the optimal parameters of the machine. As a result of the conducted research, regression equations were obtained that allow determining the degree of soil crumbling, the surface area of the cultivated layer, the height of the resulting irregularities, as well as the specific draft resistance of the device. Based on these equations, graphs showing the relationships between parameters were constructed.