Factors affecting quality of tillage with disc harrow
2021
Zubko, V., Sumy National Agrarian Univ. (Ukraine) | Sokolik, S., Sumy National Agrarian Univ. (Ukraine) | Khvorost, T., National Univ. of Life and Environmental Sciences of Ukraine, Kiev (Ukraine) | Melnyk, V., National Univ. of Life and Environmental Sciences of Ukraine, Kiev (Ukraine)
Disc tillage allows to solve important agronomic tasks: destruction of weeds, pests and pathogens of plants; preservation and increase of moisture reserves in the soil; activation of microorganisms; incorporation the plant residues and mineral fertilizers into soil; providing the necessary conditions for high-quality subsequent tillage operations. The aim of this study was to determine the impact on the quality of tillage with disc harrows of such parameters as the machine speed, set depth of tillage, direction of movement of the harrow relative to the furrow. During the field experiments, such indicators of tillage quality as deviation of the tillage depth, field surface alignment, furrow bottom profile, percentage of plant residue incorporation were studied. The tillage quality was investigated in dependence on the working speed (2.5; 3.1; 3.6; 4.2 m∙sE−1), set depth of tillage (7, 10 and 14 cm), direction of movement (along and at an angle to the furrow line). The analysis of the obtained data made it possible to determine the parameters of the speed of the tillage aggregate, the depth of cultivation and the direction of movement in the field, which allow to perform disc tillage in compliance with agricultural requirements. The values of deviations in the depth of cultivation satisfied the agricultural requirements in both directions of movement of the unit, except for cultivation to a depth of 14 cm. The values of the furrow bottom profile were better when moving at an angle of 35º to the furrow line. For all tillage depths, the highest percentage of plant residues incorporation (46.4%, 59.3%, 65.7%) was observed at speed 3.6 m•sE−1.
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