Regression analysis of ploughshare parameters for different depth sowing of seeds and fertilizers

Abstract

The study reveals the disadvantages of technical units intended for sowing grain crops. Vectors of modernization of existing and the design of new working bodies of sowing equipment were identified. The arrangement and principle of ploughshare operation for different depth sowing of seeds and fertilizers is described. The results of the planned experiment are presented, the regression equations are obtained describing the process of changing the uniformity of seeds distribution along the length and width of the planted furrow. Based on regression equations, response surfaces, uniformity of seed distribution along the length and width of the planted furrow are built depending on the design parameters of a ploughshare. The experimental studies revealed that the uniformity of seed distribution (85.5 % in length and 76.3 % in width of the planted furrow) is achieved with the following ploughshare parameters: drift angle α=15 degrees; roll angle β=15 degrees; cutout length of a lower edge of a leg L=50 mm. With these design parameters, the proposed ploughshare provides a uniform depth of seeding-down and meets the corresponding agricultural requirements. At the same time, mineral fertilizers are embedded below the horizon of the main crop at 30…40 mm.