The sources of nutrient accumulation in beans and bean seeds are the process of photosynthesis, root nutrition during the seed filling period, as well as the reutilization of substances accumulated in the vegetative organs in the previous period. The close dependence of the competition intensity on the number of plants per unit area of sowing is revealed. It was found that although increased nitrogen doses significantly reduce the competitive mutual inhibition of plants, it begins earlier than with a low nitrogen nutrition level. The main factor for which bean plants compete during the emergence-beginning of flowering phase under normal cultivation conditions is the available soil nitrogen. Therefore, the nitrogen fertilizers rational use leads to a more complete phenotypic manifestation of the vegetable beans genetically determined productivity.

In the course of the experiment on the comparative assessment of selenium-containing preparations selephlan and plexomin Se-2000 in the treatment of white muscle disease in young sheep, it was determined that selephlan has a more pronounced effect on the clinical and physiological state and intestinal biocenosis of lambs, their morphological and biochemical blood parameters, as well as the level of antioxidant protection of the body of animals. Under the influence of the preparation, the erythro- and hematopoiesis is activated in lambs, as well as the normalization of biochemical blood homeostasis. The level of enzymatic activity (AST, ALT, ALP, LDH) significantly decreases in 1.36 (p≤0.05); 1.71 (p≤0.001); 1.21 (p≤0.05) and 1.3 (p≤0.01) times, while the concentration of carotene increases in 3.1 times, vitamin E increases in 1.73 times and vitamin A increases by 26.8%. Selephlan helps to reduce the concentration of DC by 21.8%, KD – by 28.7%, MDA – in 1.61 (p <0.05) times.

Cows’ milk productivity determining method of includes: determining the amount of milk during control milking, milk sampling and analyzing its fat and protein content for each milking, they are the same indicators for the day; calculating the conversion coefficients of milk amount and the mass fraction of fat and protein for each milking into daily indicators. Then one control milking is performed per day, and the same indicator is calculated for the same type of feeding, maintenance, and milking based on its indicators multiplied by the Corresponding coefficient. The time intervals between milking being unequal, milk productivity is more accurately determined by a single milk yield after a longer interval between them. For this method, milk cows are taken from the tenth day of lactation and more. The method allows reducing labor costs and working hours of operators and laboratory assistants to daily determine the dairy productivity of cows, as well as to reduce the stress load on animals.

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