LABORATORY TESTS OF COMBINED OPENER FOR SOWING GRAIN SEEDS
The article deals with the results of laboratory studies of the combined double-disc opener which carried out in order to optimize the proposed design, influencing the quality of sowing grain crops. The main indicators characterizing the quality of sowing are the uniformity of the distribution of seeds along the length of the row and the depth of their seeding. These indicators directly affect the yield of the cultivated crop. Based on the selected technique the optimal constructive-regime parameters of the constructed opener were determined, under which the indicator of uniformity is the highest. Carrying out a multifactorial experiment made it possible to find out the optimal values of the kinematic regime (λ), the angle of descent of the seed from the bent part of the ripper (δ) and the width of the heel of the ripper (b), in which the coefficient of variation in the distribution of seeds along the length of the row was the smallest. In the coded and decoded form the expression by means of which the specified indicators were found is presented.