Layered application of mineral fertilizers with the coulter ripper of a combined unit

Abstract

The applied methods of fertilizing cotton in Uzbekistan have a number of significant disadvantages. They do not provide available nutrients to the plant’s root system. With the distribution of fertilizers in the zone of root development in layers in the required ratio, the coefficient of their use and the yield of cotton increases. (Purpose of the study) To substantiate the design parameters of a subsoiler’s distribution pipeline for three-tier fertilization. (Materials and methods) The design of a developed pipeline distributor for three-tiered fertilization is presented. The subsoiler is equipped with a fertilizer distribution pipe, which consists of a cylindrical and inclined funnel-shaped part, a high-flow channel and a lower fertilizer distributor. In the conductive channel, two branch pipes with reflective plates are installed, which cut the moving fertilizers and direct them to the appropriate soil horizon. (Results and discussion) We investigated the movement of mineral fertilizer granules along the fertilizer channel, on the basis of which the length of the pipes of the upper and middle tiers was determined.Experiments were carried out to study the influence of the length of the protruding part of the baffle plates of the branch pipe and the angle of inclination of the pipeline-distributor funnel on the distribution of fertilizers and on the unevenness of the flow of fertilizers into the upper, middle and lower tiers. The parameters of the loading funnel of the vertical pipeline, branch pipes and movable plates of the upper and middle tiers, in addition to the fertilizer diffuser of the lower tier, were substantiated.We theoretically and experimentallysubstantiated the parameters of the nozzles of the upper and lower tiers. With optimal lengths of the branch pipe and baffle plates, a given fertilizer placement depth is provided in three tiers with the required amount of fertilizer. The influence of the parameters of the distribution pipeline on the uniformity of fertilizer distribution in the upper, middle and lower tiers was established. The rational parameters of the lower fertilizer spreader were substantiated, which ensures uniform distribution of fertilizers over the working width of the working body.