Relevance and methods. Currently, beef production is mainly developing on the breeding of black-motley breed of the cattle in agricultural organizations with a small plume of livestock. The increasing of calves’ productivity in the early period of growing in the farms requires the use of various biological active substances, which include probiotics. Feeding of different doses of probiotic "Basulifor-C". Results. The addition of 15 and 20 g of probiotic per day to the diet for experimental calf groups per head allowed obtaining an average daily live weight gain of 8.5 and 19.3% more than in the control. The costs of exchange energy per 1 kg of gain were lower in the experimental groups, respectively by 7.9 and 16.2%. The analysis of the morphological and biochemical parameters of the calves’ blood at the end of the experiment showed that in the calves’ blood of the experimental groups there was an increase in leukocytes in the second experimental group by 2.1 and in the third by - 3.1%, hemoglobin in the third group was greater by 3.1, total protein by 2.9% in relation to control. A noticeable increase in the protein fraction in the blood of albumin calves; it was 6.7% more in the second experimental group.

The results of the study found that "Hepato Food" has a positive effect on the veterinary and sanitary indicators of turkey slaughter products. The drug promotes liver regeneration, as well as reducing the negative effects of anthropogenic factors.

Porcine circovirus associated diseases (PCVAD) - one of the most economically significant diseases of swine. No one of the PCVAD has any specific clinical symptoms. Causative agent is a porcine circovirus type 2 which belongs to Circovirus genus Circoviridae family. Nowadays PCV-2 is ubiquitous. Vaccination against PCVAD is widely using in most of swine farms. Vaccine application against PCVAD does not elicit development of sterile immunity. These fact is making conduction od diagnostic investigations with using of materials from animals of different ages/technological groups are necessary. The article is describing results of investigation about PCVAD diagnosis with applying of longitudinal method of monitoring. Application of the ELISA test-kits for detection PCV- 2 specific immunoglobulins IgG/IgM and polymerase chain reaction for the DNA of PCV-2 detection in blood serum allowed to set significant differences in serology and virology profile in examined farms. It was founded that viremia level in different technological groups is ranged from 0 to 40%; seroprevalence level - from 0 to 100 and from 10 to 50% for specific IgG and IgM, respectively. Application of ELISA test-kit for detection of immunoglobulins IgM to PCV-2 allows to detect a contact animals with PCV-2 (or vaccination) earlier than in case with immunoglobulins IgG. The obtained data reveals possibility of application scientific-based approach in detection of major pathogen in case of systemic disease development such as porcine respiratory syndrome complex (PRDC). In addition, monitoring investigations might be helpful in case of study of a control measures and specific prevention of PCVAD.

Relevance. Small-scale farming on a private basis have some disadvantages. Many similar farms do not take timely measures to combat pest diseases, especially against helminthiasis pathogens. Echinococcosis was among the main helminth diseases in sheep in the Absheron Peninsula territories and the adjacent Khizi region too, where we conduct research. It’s widespread in Azerbaijan and greatly damaged sheep breeding. Reesults. During study, we detected the species of E. granulosus in sheep atall study points in the Absheron Peninsula and Khizi. Thus, the relative prevalence of invasion was recorded in the villages Tudar (47,9%), Jeyranbatan (47,6%), Altyagach (46,5%), and some low the percentage of infection in the villages of New Yashma (20,6%), Hovsan (21,8%), Mushvigabad (25,0%). Hence, analysis of the echinococcosis causative agent shows spread of this invasion throughout the farms in different forms. It has been studied in altitude belts too. There are such results: an invasion’s high extensiveness was recorded in the low-mountain (45,1%) zone.

Relevance. Recently in zootechnical science mathematical methods of researches, tools of the quantitative description of the selected signs are more often applied. This indicates that science is moving to a higher stage of its development. One of the modern methods in animal husbandry is the creation of growth models of cows, which is especially important for the current stage of the dairy cattle industry. Methods. The article presents materials of lengthy scientific research on the mathematical description of the growth of heifers and dairy cows in accordance with the requirements of ideal types of 1931 and 1974. Results. A quantitative characteristic of live weight and basic measurements of the body of ideal type cows has been developed. The cows linear growth constants for growth models are calculated. The changes in the body volume and the “Breed Specialization Index” with age by growth standards were determined. Linear differences were revealed in changes in body weight and body measurements in animals. The author’s technique for the creation (breeding) of ideal dairy model cows is described.

Authores analyzed the trade foreign balance of the Russian horse industry in the years 2016-2018, estimated the prospects for local and foreign markets of the products of Russian studs and horse breeding farms and gave recommendations for the sports horse breeding.

A comparative assessment of the natural potential of agricultural land in the foothills of the Bay region of the Republic of Khakassia is carried out. The assessment point is determined by the soil-ecological index, which is determined through the product of soil, climate and agrochemical indices. When assessing agro-climatic conditions, the following indicators were taken into account: continentality coefficient, humidification coefficient, and the final climatic indicator was calculated. Results. It has been established that in the climatic zones, the climatic index in the series is naturally decreasing: forest-steppe, real steppe, dry steppe, due to a decrease in the territory’s moisture supply. PEI is changing in the same direction, the most valuable soils are formed in the forest-steppe zone and are represented by leached chernozems, as well as ordinary foothill steppes, their non-degraded counterparts with a maximum bonitet score of 55.1 and 44.2 have a maximum bonitet. Less valuable soils are allocated in the steppe zone, where the PEI of the southern chernozems decreases to 37 points, and in degraded counterparts to 32, which leads to a significant decrease in the yield of grain crops in this zone. In the dry steppe, where dark chestnut and chestnut soils are common, the average score was 30 points. Highly degraded chestnut carbonate soils with the least value and the lowest grading point, as well as southern loamy and loamy granular composition black soil, highly degraded, are distinguished in this territory. Bonitet values do not allow specializing here in the direction of cultivating crops, these are unproductive soils and are not suitable for arable use.

Relevance and methods. Each means of mechanization has a certain potential of energy sources and energy resources, and therefore part of this energy is given to the products produced annually. Thus, the energy capacity of all means of mechanization used in the cultivation of this plant should be defined as a measure of energy consumption for an individual product or unit of growing area. CO Results. The total energy intensity of the technology is mainly characterized by its mass. However, from the cost of individual units, technological operations, any technology as a whole, the cost of production, etc. it is more desirable to calculate the energy used for hourly operation of the unit - the specific energy intensity. From the obtained results it is clear that with increasing productivity of tillage machines their specific energy intensity increases depending on their metal processing. The results of the study show that the best option for general purpose plows in terms of energy consumption should be B = 1.40 m. During the research, the influence of energy consumption in soil cultivation was studied.

Relevance. The main producers of vegetable products are private farms. Most large russian agricultural enterprises grow varieties and hybrids of foreign selection. In this regard, the urgent task is to attract attention to the varieties and hybrids of vegetable crops of domestic breeding, in particular Federal State Budgetary Scientific Institution “Federal Scientific Vegetable Center", which must meet the current requirements of manufacturers and the market. For the culture of beetroot, in connection with the intensification of agricultural production, an important direction in the selection - the creation of single-seed (separate) varieties and hybrids with a complex of economically significant features suitable for mechanized cultivation. Methods. With the use of classical methods of selection in the laboratory table root crops Federal State Budgetary Scientific Institution “Federal Scientific Vegetable Center" (VNIISSOK) created monogermity varieties Bordo odnosemyannaya and Dobrynya; one-two-seeded varieties Lubava and Gaspadynya. The actual requirement of vegetable producers, ensuring the payback of crops, is the stability of the manifestation of the average value of varietal characteristics in a particular zone, regardless of the prevailing conditions of the growing season. Results. As a result of competitive variety testing conducted in the conditions of Odintsovo district of the Moscow region on the fields of the main crop rotation of the "Federal scientific center of vegetable growing" (VNIISSOK) in 2015-2017, it is shown that the studied varieties are characterized by a set of features that allow to obtain a stable harvest, exceed foreign varieties and hybrids in terms of dry matter and sugars, have high safety during long-term storage. All this determines their competitiveness and allows to include in crop rotations of farms without risk to their profit, and also to use in selection of heterosis hybrids of beetroot domestic selection as sources of separateness.

Relevance and methods. Special machines for nurseries of the future hazelnut garden are not produced. The use of landing machines for this purpose requires appropriate technological and mechanical improvement. Due to the complexity and high volume of manual labor, it is necessary to find ways to increase the productivity of existing landing machines. The object of the research was the working process of the planting machine in the nursery for hazelnut plantations, the analysis of the productivity of the planting unit. Results. It is established that a more advanced technological process of transfer of seedlings, embodied in the machine, in which the planting machine is served by one worker, allows to reduce labor costs by 45% compared to the indicator when using the existing planting machine.

Relevance. At present, the environmental crisis due to the drying up of the Aral Sea is especially acute in the Southern zone of the Aral Sea region. Due to the deterioration of the ecology of soils, crop yields are sharply reduced. All this causes the need to strengthen research to ensure the sustainable development of crop production in arid regions. In the course of the research, the influence of the number and depth of row spacing on the agrophysical properties of soils was studied. Methods and Results. With optimal inter-row tillage, the bulk soil mass, duty cycle and soil structure are preserved. Improving the agrophysical properties of the soil contributes to the good development of cotton. The average cotton crop for three years (2009-2011) was 30.4 c/ha, in the area where the first cultivation was carried out at a depth of 8-10 cm with the simultaneous application of mineral fertilizers, subsequent cultivation of the row-spacing at a depth of 10-15 cm, cutting furrows, cultivating and cutting furrows with the introduction of mineral fertilizers. In six-fold inter-row soil treatment, the control version produced 26.7 c/ ha of raw cotton or 3.7 c/ha less than the optimal variant.

Relevance. One of the numerous and representative groups of soil animals-bioindicators, represented in all biogeocenoses - are earthworms. A change in the chemistry of the habitat leads to a change in their numbers. The article presents data on the indicator potential of earthworms in soil contamination with heavy metals. Methods and Results. Sampling of soil and earthworms was carried out in 11 sections of the South-Western Administrative District of the city of Moscow, confined to areas of various technogenic loads. The article presents data on the indicator potential of earthworms in soil contamination with heavy metals. A strong feedback was established between the total soil pollution coefficient and the number of worms, a weak feedback with their mass, and a strong direct relationship with the total concentration coefficient of heavy metals in earthworms.