Abstract
To mechanize the spreading of photodegradable polyethylene films on cotton crops, a device has been developed for spreading narrow (300 mm wide) film strips on cotton crops, consisting of a reel with film, a film-spreading drum with a film-pressing roller and spherical disks for sealing the edges of the film. In order to maintain the operational performance of the seeding unit, the rational diameter of the film reel is D_1n=0.4 m, at which the reel is changed simultaneously with the filling of seeds and fertilizers. The paper presents the results of the study of the optimal arrangement of the working bodies of the device covering the photodegradable film on the planted rows and the research of the operating modes. For this, a multifactorial experiment was carried out using the method of mathematical planning. The following optimal rounded values of the factors were determined: the angle of attack of the disk is 13º, the depth of its course is 0.04 m, the distance between the edges of the disk and the film - 0.02 - 0.03 m and unit speed - 1.25 - 1.39 m / s.