EFFECT OF UPPER-TIER BODY WORKING DEPTH ON THE AGRO-TECHNICAL AND ENERGY PERFORMANCE OF A TWO-TIER DISC PLOUGH
Abstract
This study investigates the influence of the upper-tier body working depth on the agro-technical and energy performance indicators of a two-tier disc plough. The experiments were conducted at operating angles of 40° relative to the direction of movement and 20° relative to the vertical, with a longitudinal spacing of 70 cm between the upper and lower bodies. The research analyzed how variations in the working depth of the upper-tier plough body-from 10 to 20 cm-affect soil pulverization quality, the completeness and depth of crop residue incorporation, field surface roughness, and draft resistance. The results showed that as the upper-tier working depth increased to 15 cm, the quality of soil crumbling improved; however, further deepening caused a slight decline due to the excessive volume of overturned soil clods. The draft resistance increased from 3.31 to 5.13 kN when the working depth rose from 10 to 20 cm at a speed of 6 km/h, and from 3.52 to 5.47 kN at 9 km/h. The best combination of low draft resistance, high soil pulverization, and effective residue incorporation was observed at a depth range of 15–17.5 cm. Empirical models describing these dependencies were derived using the least squares method, achieving coefficients of determination R² above 0.97, confirming the accuracy of the established relationships. The findings suggest that maintaining the upper- tier body working depth within 15–17.5 cm ensures optimal energy efficiency and soil tillage quality for two-tier disc ploughs under similar field conditions.
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References
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