On the white mustard testes on soddy-weakly podzolic soil is revealed a complex of pests belonging to the orders Coleoptera, Hymenoptera, Lepidoptera, Homoptera, and five types of fungal diseases. Spraying of 5% Sumi-alpha insecticide with a consumption rate of 0,2 l/ha reduces the number of pests on flea beetles, bedbugs, aphids, blossom veevers, cabbage whites and moths on the 25th day after applying by 90,5-99,3%.

The effect of fertilizers on physiological processes intensity and spruce growth in a 120 year-old blueberry spruce forest of the IVth quality grade has been studied. The study describes the change in the root respiration intensity, photosynthesis, transpiration, concentration of photosynthetic pigments, moisture content of spruce needles and their biometric parameters under the influence of mineral fertilizers (urea, double superphosphate and potassium chloride).

The study is carried out in LLC «Evrodon», October (c) district of Rostov region. It has been found that males at the age of 140 days are larger 1.80 times more than females, 147 days - 1.62, and 154 days - 1.58. Breast weight of males is 5.42 kg, that is 2.19 kg more than in females. Chemical meat composition has been showed that the dry matter in the meat of 147- day- old males is by 0.86% higher compared with 140 -day-old ones; the dry matter in the meat of 154- day-old males is by 0.33% higher compared to 147- day-old ones. The index in females is 0.5% and 0.6% respectively.

The article presents the results of studies on the urea content and the mass fraction of protein in the milk of cows with a tethered and loose method of maintenance, taking into account the technology of milking cows, depending on the season. The optimum content of urea, protein in cow’s milk is established in summer period, the greatest one is revealed in winter period with all milking methods and maintenance technologies