Abstract
Spraying with herbicides allows you to successfully control weeds. When processing perennial plantations of fruit and berry crops, a certain problem is bypassing the tree trunk. To ensure the quality of soil cultivation in the near-stem areas, a sprayer design with a rotary device was developed. The novelty of this design is confirmed by the patent of the Russian Federation. In the theoretical aspect, a study was made of the uniformity of surface treatment of near-stem zones. As a result, the dependence of the treatment area of the near-stem zones on the diameter of the boles, the distance between them and the angle of rotation of the sprayer's working body was obtained. The uniformity criterion was the maximum area of processing and the minimum area of double processing of the zone near the bole. The optimal initial installation angle of the working body was 58°…60°.
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