Scientific Journal of KubSAU

In the provided article, the economic justification of the use of the line of recirculation at the head meliorative pump stations is considered. The purpose of economic calculation is to compare the work of one unit in various operational options. According to the results of the calculations, the main conclusions are drawn

In this article the scheme of landing of early tomatoes and cucumbers in the climatic conditions of the Rostov region is described; we have also calculated the dose of fertilizers for jet system of mixture at a fertigation irrigation. The conclusion is drawn with a possibility of cultivation crop rotation of tomatoes and cucumbers in not heated greenhouses with application of fertilizers

The analysis of the developed types of local system of an irrigation is presented in this article with simultaneous input of nutrients. On the basis of an experimental material it is noted that development of the technological process is necessary for the solution of this problem, allowing to provide sufficient input of nutrients, at cultivation of vegetable and fruit crops. Installation for mixture of fertilizers and water according to the patent 2448450 is considered

The testing of jet pumps, installed on the recirculation line of circulation axial pumps are dealt with in this article. A number of experiments with nozzles of different diameter and installation sites have been conducted to increase the suction head of circulation pumps. The main conclusions have been done after testing