Pig breeding is considered one of the most significant directions of livestock breeding both worldwide and in the Republic of Armenia. Various types of antibiotic drugs are used in animal husbandry, particularly in pig breeding, to promote animal growth and development. The current challenge in agriculture is antibiotic resistance, which can be caused by improper use of antibiotics in animal husbandry. In the study, 50 biological samples (feces samples) of 50 pigs were collected from three regions in the Republic of Armenia. We found Salmonella spp. in 6 (12.0 %) of 50 pig samples studied by us and in 41 (82.0 %) bacteria belonging to E-coli groups was detected. The detected bacteria belonging to the Salmonella group showed absolute 100 % resistance to 7 out of 16 antibiotics. The detected E. coli bacteria showed 100 % resistance to 7 out of 16 antibiotic types. When carrying out antibiotic treatment against salmonellosis and colibacteriosis diseases in pigs, The results of the research should be taken into account and the use of antibiotics of this type should be excluded.

The study was conducted on Holstein cows, which were imported from Germany and kept in the “smart” barnyard of the “Pepi Agro” farm at the Armavir Marz of the Republic of Armenia. According to the results, during the first lactation, 5827 kg of milk was yielded, fat and protein contents in milk were 3.82 and 3.27 %, live weight was 535 kg, and milk yield was 10.9 with the average milk flow rate of 2.37 kg/min. According to the 1990 appraisal, these cows exceeded the standards of the Holstein breed in terms of milk yield, fat, and protein content, as well as live weight. However, their milk yield was lower than the mothers bred in Germany by 2933 kg or 50 %. We propose to continue the importation of Holstein cows and their further breeding in “smart” farming conditions in the Republic of Armenia.

Thearticle considers theproblem of providingconstant or almost constant values of the blade cutting angles during one rotation of the tiller rotor with a vertical rotation axis. Analytical expressions were obtained by analyzing the trajectory of the tiller knife/blade, which enable to determine the change of the blade cutting angles at a constant location and to fine the patterns of this change in the ranges of (0...π) and (π...2π). The derived expressions and conclusions make it possible to adjust the location angle of the knife, using a pattern, in case of which the cutting angles of the knife will remain unchanged during one rotation of the rotor. This circumstance is important from the prospect of ensuring a uniform working mode of the rotary tiller.

Using DNA banks or gene libraries is the most efficient method of protecting and managing valuable, endangered, and rare gene pools. Genomic libraries are collections of bacteria colonies with restriction sites on their genomic DNA that contain desired genes from a specific organism. The “Scientific Center of AgroBiotechnology” branch of ANAU has created gene libraries of 34 plant species, which are preserved in the National Genebank of Crops and their Wild Relatives, which forms a basis for genomic selection. This allows genetic identification, barcoding, DNA formula decoding, and, most importantly, is the basis for genome identification. Based on the results, plasmids can incorporate restriction segments of genomic DNA and be efficiently transformed. The high level of correlation between the number of necessary clones and the efficiency of transformation of all studied plant species proves the completeness of the gene pool.

The article presents the direction of degradation processes in eroded forest brown soils based on the example of the Bazum community of the Lori region. It also shows the qualitative characteristics of these soils, the thickness, the degree of humus content, and the availability of nutrients. New technologies and methods of resource saving tillage and plant care are proposed to mitigate erosion processes, degradation, and desertification of soils based on the research conducted.

Brucellosis is a common bacterial zoonosis caused by Brucella spp., which are facultative intracellular gram-negative cocco-bacilli, causing disease in cattle, small ruminants, and humans. The occurrence of brucellosis is widespread across a wide geographical area as well as endemic throughout the Caucasus region. The Ministry of Agriculture of Armenia has adopted a diagnostic algorithm consisting of screening samples with the Rose Bengal Test (RBT) followed by confirmation with the complement fixation test (CFT). This study determined the feasibility of the algorithm and diagnostics in Armenia. Sampling and testing were conducted in two marzes of Armenia with disparate brucellosis prevalence. The screening was performed in 2020 at regional laboratories, followed by retesting at the reference laboratory with RBT and confirmation by CFT. Results indicated that RBT testing was reproducible between laboratories, although positive rates in CFT testing were slightly higher. Brucellosis incidence in cattle was not geographically dependent, while sheep incidence was affected by location. The addition of CFT to the diagnostic algorithm improves the results.

The data of the study indicate that the service period of the cows of the 4th-5th lactation is 5-58 days higher than the norm in the “Vamaks” LLC cattle farm of the Syunik region of the RA, and the coefficient of reproductive ability varies in the range of 86.3-98.6 %. Due to sterility, the loss of lactations in the 5th lactation is 16 and the loss of milk quantity is 126 tons. We propose to identify and inseminate (mate) animals with sexual desire in a timely manner, as well as to establish strict veterinary control to monitor and regulate the service period of 4-5 calving cows.

Research in this area aims to develop a milk-protein product similar to ricotta cheese. This product will be the second component of the newly developed twocomponent Yogrik product, a mixture of yogurt and ricotta. Combination of the biological value of yogurt and ricotta will create a balanced amino acid food. Cheeses obtained by acid and thermo-acid coagulation are usually fresh soft cheese varieties made by the coagulation of milk, cream, whey, or their mixtures, by direct chemical acidification, bacterial cultures coagulation, or by a combination of chemical acidification and high-temperature processing. In appearance and production technology, ricotta is between cheese and cottage cheese. But in terms of the softness of the clot and versatility, it is an outstanding product. Ricotta is rich in proteins including albumin and contains about 11 % protein. Whey cheese proteins are in the most easily assimilated state. Combining the biological value of yogurt and ricotta will create a balanced food with amino acid content.

A nation’s health and mental strength depend on its food consumption which is one of the main conditions for the full functioning of the human body. In modern times, the demand for sour milk products has increased significantly due to their dietary and medicinal features. The research object was pure cow’s milk, almond milk, almond flour, and samples of sour milk products. During the work, a study of the physicochemical and sensory indicators of the raw materials added almond milk, and the finished product was performed. Based on the sensory and physicochemical indicators of the product, the optimal dosages are as 70 % of cow’s milk, 30 % of almond milk, and 1.5 % of almond flour were determined. Based on the above, it is recommended to introduce the developed technology of lactic acid products in production, which will complement the assortment of sour milk products, enrich the chemical composition of the product, and increase the body’s resistance and digestibility.

The second part of the article series is about the study of the influence of yeast and autolyzed yeast derivative on red wines’ qualitative and quantitative characteristics. Wine samples in which the preparation process was explained in the first part of the article were investigated. Wine coloring and phenolic compounds were measured. Organoleptic properties of the wines are presented as spider graphs with tasting notes.