ANALYSIS OF SOIL DISPLACEMENT DEGREE BY DISC WORKING BODIES IN TILLAGE OPERATIONS.

Efficient soil tillage requires optimization of the geometrical and operational parameters of disc working bodies to ensure adequate soil displacement while minimizing energy consumption. This study investigates the influence of disc diameter, attack angle, inclination angle, and operating speed on the degree of soil displacement. A theoretical model describing soil lateral displacement is developed and validated experimentally under medium loam soil conditions. The results demonstrate that soil displacement is directly proportional to disc diameter and attack angle but increases draft resistance nonlinearly [1–3]. The optimal parameter combination (disc diameter 560–660 mm, attack angle 18°–22°, inclination angle 18°–20°, speed 7–8 km·h⁻¹) provides a 10–12% improvement in energy efficiency while maintaining agronomic requirements. The proposed analytical model shows strong agreement with experimental data (error ≤ 12%), confirming its applicability for engineering design and optimization of disc tillage implements.