Tillage machines are called upon to cultivate the soil in a way that provides the best opportunity for the development of the cultivated crop (Mitkov, 2023). Another important calling is to preserve soil fertility and create equal conditions for germination and emergence of seeds from agricultural crops. Last but not least, of course, the economic aspect of the operation must meet the minimum for such a reduction in production costs and an increase in income from the cultivated crop. When cultivating the soil, we exert mechanical influence on the working bodies of agricultural machinery in order to achieve a certain structure under the agrotechnical conditions for growing a given crop for a certain time, on a certain volume of soil. The goals of soil cultivation are higher crop yields, but also preserving soil fertility. Agronomically valuable soil is 1-25 mm in size, aggregates with sizes smaller than 1 mm lead to soil fragmentation (Genkova, Dallev, 2024). After processing with agricultural machinery, the tasks are many, but one of the essential and important factors is the size of the soil aggregates. These, of course, are directly related to the type of soil, the mechanical physical composition and the content of physical clay. In this study, we consider soil fractions with a size of less than 1 mm, which lead to soil erosion. The experiments were conducted with a new model of soil tillage implement, on a soil background plowing.
Ключови думи: tillage, agronomically valuable soil, aggregate size, new model of working body