Effect of constructive and operating parameters of anchor plowshare on the formation of drill furrow

Abstract

Theoretical bases of soil movement were developed whereby a drill furrow was formed by an anchor plowshare with an acute angle of soil penetration with spaced structural elements. When the seeding working tool penetrates the soil at the depth of 0.06-0.08 m and the radius of its tine 0.2 m, the speed of movement of soil particles by the tine increases almost linearly on average by 11%, with the coefficient of soil friction against steel being from 0.3 up to 0.6 and the speed of the sowing unit movement - from 1 to 3 m/s. At the same time the speed of soil movement by the tine point and the tine of the seeding working tool exceeds the speed of the sowing unit by 1.6-1.8 times depending on the values of the coefficient of soil friction against steel. The height of the real soil tillage by the tine of the seeding working tool given the same speed range of the sowing unit increases by almost 4 times. The dependency was revealed between the value of the soil layer shift by the seeding working tool from the sowing zone into the inter-row space and the sowing unit speed. When the speed increases from 1 to 3 m/s, the shift increases by 15-32%. The maximum soil movement is observed with the angle of inclination of the side edge of the seeding working tool by 75°. Absolute values of soil movement were within the range of 0.35-0.45 m, which is sufficient to move the required amount of soil into the inter- row space when doing furrow sowing.