# Shebanin V., Atamanyuk I., Gorbenko O., Dotsenko N. Determining the optimal parameters of machines for processing the seed mass of vegetable and melon crops

UDC 631.361.8

Shebanin V.

Atamanyuk I.

Gorbenko O.

Dotsenko N.

The article presents a method of mathematical modeling, which is based on a nonlinear canonical distribution of a random vector, to determine the optimal parameters of machines for the separation of seed mass of vegetable and melons. It is presented a block diagram of the procedure for calculating the parameters of canonical decomposition.The method of mathematical modeling was tested in the study of the technological process of separating melon seeds in the experimental setup. There are described third-order mathematical models for purity and seed loss, that presented the technological process of a melon seed separation based on a nonlinear canonical decomposition of a random vector. Using this method allows to obtain mathematical models of technological processes for an arbitrary number of known input parameters that are used to evaluate seed characteristics, nonlinearity order, and stochastic coupling characteristics. The proposed mathematical model allows to take into account the peculiarities of technological processes of seed separation and, as a result, to achieve the maximum quality of division of seeds of melons. There are the described stages of the mathematical modeling method, which is based on a nonlinear canonical distribution of a random vector, to determine the optimal parameters of machines for the separation of seed mass of vegetable and melons. The method is tested on the basis of the technological process of seed separation using an experimental sample of a cylindrical separator. Statistical experimental data processing allows to obtain third-order mathematical models for purity and seed loss, describing the process of separation of melon seeds on a cylindrical machine. The results of the experimental studies confirmed the high accuracy of the proposed method, which can be used to simulate an arbitrary process with stochastic properties. Refinement of the parameters of the working bodies of machines on the basis of advanced mathematical models will facilitate the development of industrial seed production.

Keywords: vegetable and melon crops, seed mass separation, mathematical method, optimal parameters.

References:

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# V. Shebanin, O. Novikov, M. Karpenko. The applicability of implementation of the irrigation in modern conditions

UDC 631.674:005.52

V. Shebanin

O. Novikov

M.Karpenko

The article substantiates the feasibility of introducing lands irrigation for winter wheat cultivation in agricultural enterprises of Southern Ukraine under the current conditions. As a result of the calculations of capital investments, their payback period and tax revenuesto the budget, it is proved that the organization of modern lands irrigation is a profitable and cost-effective way of mechanized irrigation, and it allows to use more rationally water and land resources in agriculture.
Thus, all the researchers have the same opinion that the yield under the use of irrigated technologies is increased by 2-3 times, even in those regions where natural moisture provides a sufficient level of crop yields, with capital investments from 1400 to 3000 dollars per 1 ha, but the choice of sprinkler or drip irrigation should be based on economic feasibility. The issue of economic efficiency of using modern sprinklers is not fully disclosed by Ukrainian scientists, so it needs further study.
Sprinklers of American production Lindsay Zimmatic were introduced for the first time in 2016 by MNAU in the Southern Ukraine. According to research and practical experience, the applied irrigation system increased irrigation efficiency, promoted productivity growth (winter wheat yield increased in 2019 by 47.58 centners / ha and according to forecasts in 2020 – by 51.52 centners / ha), reduced energy consumption and labor costs. The introduction of sprinkler irrigation has allowed to develop scientifically-grounded technologies of growing modern domestic and foreign varieties and hybrids of grain and technical crops.
Based on the obtained data during 2018-2019 years and the forecast for 2020, it was calculated the economic efficiency of sprinkler irrigation. For three years of  irrigation introduction the additional profit in the amount of 5336,0 thousand UAH from the area of 124 hectares with capital investments about 4610,0 thousand UAH will be received, return on investment in sprinkler irrigation will take 3 years.
During 2018-2020 years due to the introduction of the irrigation system by the university, it will achieve an additional increase in budget revenues by 782.86 thousand UAH and obtain budget efficiency on the level 19.05%.

Keywords: irrigation, economic efficiency, winter wheat, Southern Ukraine, university.

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