The aim of the research is to substantiate the main parameters of the machine working elements for preparing the soil for sowing on the ridges and their mutual location. The authors have developed a machine that performs all technological operations to prepare the soil for sowing potatoes on the ridges in one pass in the field. The machine performs surface loosening of the soil, strip deep loosening of the soil, formation of ridges, loosening of the surface layer of the ridge top, compaction, and giving them a trapezoidal shape in one pass. The design of the developed machine for the realization of technology of preparing the soil for potatoes sowing is resulted. The basic principles and methods of classical mechanics, mathematical analysis, and statistics were used in this study. Theoretical studies established the following parameters of the working bodies of the machine: the working width of the bodies 200 mm, length of the blade wing 515-545 mm, angle of slope of the ploughshare left to its base 60, length and height of the guide knife respectively 150 mm and 80 mm, the longitudinal distance between the bodies within 350-400 mm, width and length of the drill bit 80 mm and 115 mm respectively, the working width of the lancet leg 150 mm.

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The technologies used to prepare the soil for sowing potatoes on ridges, consisting of numerous soil preparation operations, lead to loss of moisture, prolonging the sowing period and increasing operating costs. The aim of the research is to develop a machine for processing and preparing the soil for sowing potatoes on ridges. The authors have developed a technology for preparing fields for sowing potatoes on ridges and a machine for its implementation. The basic principles and methods of classical mechanics, mathematical analysis and statistics were used in this study. On the basis of multifactorial experiments, the following parameters are justified: the angle of inclination of the ploughshare blade in the range of 6-70, the height and length of the guiding knife in the range of 94-110 mm and 107.2-136 mm, respectively. The main parameters of the working bodies of the machine and its technical characteristics are given. The results of the tests have established that the proposed machine for preparing the soil for sowing on the ridges reliably performs the specified technological process and its performance indicators fully meet the requirements. The use of the machine provides a reduction in operating costs for processing 1 hectare of area in comparison with the technical means used by 33.8 %.