Zayets M. Explaining the characteristics of coulters in seeding machines

The paper is devoted to researching the technological process of seeding the grain crops using the coulter for undersoil spreading seeding. The process of seed distribution with the usage of combined distributors with curvilinear element has been studied. The speed of seed outgoing from the distributor which influences on the range of throw and seed equitability at the field surface have been determined. The coulter distributor for undersoil spreading seeding has been developed and studied. The influence of combined distributor characteristics on the range and equitability of grain crops seeds distribution has been experimentally substantiated. The speed of seed at the distributor's surface depending on the diameter of the element circle has been defined. And as the result, the seed's range of throw and the coefficient of distance variation between seeds, which characterize the distribution equitability have been defined. Keywords: process of seed distribution, spreading method, seed crops, coulter, combined distributor, distribution equitability, coefficient of variation, technological characteristics.