Justification of a technological scheme of technical means for application of liquid mineral fertilizers into the soil

The article presents the results of justification of a technological scheme of technical means for the application of liquid mineral fertilizers (LMF) into the soil during the cultivation of agricultural crops. It was found that the formation of the structure of this technical means is based on the construction of its functional-structural model which is based on the definition of the composition of functions and functional model of the future product, the search for variants of technical solutions for functions, the construction of the structural model of the developed technical means, and at the final stage on the evaluation and selection of the variants of working bodies (technical solutions) and promising technological schemes of the future technical means. Due to the identification of cause-and-effect relations between specific technological operations to be performed by the technical means, as well as technological and technical solutions, the composition of its functions has been determined, including transportation of the LMF stock, ensuring the specified application rate, distribution of the LMF on the working bodies and in the application strip. The structural scheme of the technical means for in-soil application of the LMF at the level of graph models of the "tree" type with representation of contours and specific interrelationships between the elements of the structure is substantiated. The prospec tive variant of the technological scheme is reproduced by complex indicators using numerical values of weight coefficients (significance) of quality indicators of technological processes performance. This variant includes a frame-mounted LMF tank, filtering devices, shut-off and metering equipment (pump, pressure regulator, pressure gauge), distributing rod, connected by hydro-communications with the device for creation of the LMF gas-liquid mixture and a multiflow liquid divider, which largely prevents clogging of atomizer openings.

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