Justification of technologies of minimum (surface) tillage

With the modern development of agricultural production, introduction resource-saving technologies, technologies based on intelligent systems, there is a need to introduce system machines for implementation surface tillage (mini-till, no-till). The main factor largely determining choice an machine, its working bodies, and processing technology are agrophysical properties soil. research was experiments determine hardness after various types treatment soils with different granulometric composition. carried out one year (autumn 2021, spring 2022, autumn 2022), total 12 fields were examined, sample about 300 measurements. As result, mathematical dependences obtained change in depth at soil speed machine-tractor unit when performing technological operation cultivation 10 cm. Theoretical studies effect resistivity cultivator according formulas Kirtbay Yu.K. (1982) Iofinov S.A. (1985). When experimental data operating speeds, using Matlab program, more precise that dependence hardness. Calculations formation optimal aggregates tractors toothed chain harrows, performed considering theoretical speeds revealed harrow width m Belarus 2022 + BZC-12 unit, 18 24 – tractor K-744R1.