The article present the data on application of a rational method of irrigation for soils with different agro-meliorative characteristics. For soils of light granulometric composition with outflow of groundwater it is necessary to apply non-flushing irrigation regimes, which save water and do not involve salts from soils in the drainage runoff. For soils of heavy mechanical composition with weak drainage and close accumulation of salt accumulations in the dry-steppe zone, a washing irrigation regime is necessary with the use of engineering drainage.

The efficiency of pure and binary crops of alfalfa with maize for green fodder in a two-factor experiment was studied at three rates of seed sowing in Municipal Unitary Enterprise Talovskiy of the Tarumovsky District of the Republic Dagestan. Soil meadow-chestnut, heavy loam not sufficiently provided with nitrogen and phosphorus, it is sufficient with potassium. When growing alfalfa in binary crops with maize for green feed only two cuts out of nine in two years showed a significant decrease in the yield of alfalfa by 1,2-1,8 tons/hе, in other cases its productivity does not decrease compared to pure crops. In spring sowing the optimum norm for sowing alfalfa seeds is 7,5 million pcs/hе and does not depend on the method of growing it. A further decrease to 5 million pieces / hе leads to a loss of 10,6-11,4% of the crop.

By the study of morphological characters in the three-leaf alfalfa (Trifolium s.l., Fabaceae) species in Azerbaijan flora the main of biomorphological evolution of the species have been determined. For this purpose from three-leaf alfalfa the group of flower, flower structure seed and fruit, also some characters from leaf were studied. According to the author results by morphological evolution it could be clear that between 50 species of three-leaf alfalfa found in Azerbaijan all of them are not belonged only one genius of Trifolium L. s.l. it is possible that they are belonging to independent several genius like Trifolium L. s.str., Amoria Presl, Chrysaspis Desv (also genus of Calycomorphum Presl, Galearia Presl).

The article presents the results of the scientific and economic experiment on the use in diets of cows with various body weight of the vitamin-mineral mixture. As a result of feeding 200 g of vitamin-mineral supplement to dairy cows at different body weight, it was established that the yield of milk of cows received supplement at 480 kg body weight was higher by 7,9%, and with a body weight of 500 kg at the same dose of supplement was only 3,7%. The effectiveness of the use of exchange energy in dairy cows at a body weight of 480 kg and 500 kg in the experimental groups was practically the same (33,5-33,6). The energy expenditure on the main physiological functions of cows with a live weight of 500 kg in both experimental and control groups was higher in comparison with animals with a body weight 480 kg by 3,1%.

Selective advantages of epizootic strains of bacteria circulating in livestock and poultry farms, with mass illnesses of respiratory and digestive organs of young agricultural animals are due to the presence of adhesive antigens, hemolysins, bacteriocins, thermolabile and thermostable toxins. In a comparative evaluation of methods for study the antagonistic properties of bacteria, it has been established that the most effective is the «membrane filters» method, which makes it possible to determine the antagonistic activity of microorganisms belonging to different systematic groups and to make a quantitative and qualitative assessment of the degree of inhibition of the antagonist strain. Based on the approbation and selection of effective methods for study the antagonistic activity of bacteria, it was established that the Escherichia produced colicins, inhibited the growth of cultures of microorganisms S. enteritidis, S. typhimurium, P. vulgaris, Y. enterocolitica. Pseudomonads synthesized water-soluble pigments - piocyanin, pyoverdin, piorubin, pyomelanin, it inhibited the growth of cultures of microorganisms S. enteritidis, K. pneumoniae, C. freundii, Y. enterocolitica. The sensitivity of the strain Mycobacterium B5 to the action of drugs: isoniazid, rifampicin, pyrazinamide, streptomycin, kanamycin, cycloserine, ofloxacin has been established. Epizootic strains of bacteria were sensitive to cephalosporin group drugs (cefazolin, cefatoxime); fluoroquinolones (ofloxacin, ciprofloxacin, norfloxacin); aminoglycosides (kanamycin, amikacin, neomycin, sisomycin); carbapenems (imipenem); polymyxins (polymyxin). 82,05% of cultures of microorganisms were resistant to antibiotics of the macrolide group (erythromycin, oleandomycin); 79,49% were resistant to ß-lactam antibiotics of natural and semi-synthetic penicillins (ampicillin, oxacillin, carbocillin). The use of hexadisks with cefotaxime, ceftazidime in combination with clavulanate, made it possible to study the production of extended-spectrum ß-lactamases by strains showing reduced sensitivity to one of the third generation cephalosporins. In the study of sensitivity to antibacterial drugs was found a direct correlation between the results of studies using diffusion methods in agar and serial dilutions (r = 0,91).

The article describes the treatment of pasteurellosis of rabbits in the second stage of pregnancy at the repeated introduction the drug SPD. Test for pasteurella carriage after treatment was negative. While litter increased growth rate of 11,5%, the safekeeping of livestock is 37,7%, accelerated the maturation of the fur. The results of these studies indicate that the organoleptic, physical-and-chemical and bacterioscopic indicators of meat meet the standards prescribed for benign healthy meat rabbits, and it can be used for food purposes without any restrictions. A biological sample of rabbits meat showed that the deterioration of appetite, disturbances in the general condition, the lag in growth and development of rats was not observed in the internal organs and tissues of rats, pathological changes were not detected. The obtained results show that the use of LDS as a curative drug against pasteurellosis has no negative impact on the quality of the products.

In industrial production technology harvesting of the crops is of great significance development of the separator the crushed grain mass. In the design of the separator and the selection of its working bodies must be considered agrobiological requirements, the composition of crushed grain mass, the content of the threshed grain, the humidity components of the heap. Separator the crushed heap implements trichotomous scheme of work: allocates full grain with high seed properties, directs the chaff and sboinu (chaff) in the store, and the straw with the corn in a stationary thresher. One of the main drawbacks of used fixed equipment is the implementation of differentiated threshing grain with obtaining separately a full and shrunken grain.