The article considers the results of experimental research related to the study of operational peculiarities of water-sprinkler device developed by our research group. The device is distinguished by its simple design and reliable operation. Throughout the investigations the numerical values of inclination angle to the horizon of device hoses have been estimated at which the maximum radius of irrigation area capture and the best sprinkling degree along the irrigated area are ensured. Some technical dependencies have been derived, that characterize the operation of water-sprinkler device with water pressure of less than 15 m.

Four different land plots with 8 ha total area have been explored to evaluate the physicochemical and ameliorative state of uncultivated soils in the subzones of Araks riverside. The physicochemical properties of the soil samples, chemical composition of water extract, content of water-soluble salts and available nutrients have been studied.
It is recommended to conduct physicochemical and agrochemical evaluation of the fallow soils in order to include them in the agricultural activities. Besides, ameliorants should be introduced in weakly salinized soils, greenhouse farms should be established in poor soils, while the irrigation should be implemented only through drip and sprinkling irrigation methods.

The article considers the assessment methods and outcomes of daily doses and fractionality of the manure supplied to digester, particularly those of anaerobic fermentation, biogas and fermented substrate quality, as well as the environmental impact.
The optimal doses and fractions of manure supplied to the digester from the manure storage facility have been determined through calculations.The results of scientific experiments enable to optimize the operational regimes of biogas plants, increase the biogas yield, improve the quality and economic efficiency of organic fertilizer.

In the perennial plantations it is possible to apply spray irrigation method instead of drip irrigation, in case of which the drippers are replaced with the holes made on the pipes, wherefrom the water is supplied through the spraying jet. Upon the hydraulic calculations water flow pressure in water supply pipes, supplied water yields and diameter of the opened holes have been estimated by means of which the balanced water supply is ensured.
Introduction of the recommended spray method will enable to significantly reduce the operational costs of irrigation systems.

In Armenia the share of vehicles with gas-powered equipment make up more than 75 % of the overall rolling stock. Thus, the operational safety of the mentioned equipment is a high priority issue.
The current work deals with the classification and analyses of refusal causes/malfunctions in gas equipment. A device for the detection and prevention of gas leakage from the car’s gas-powered equipment is recommended, which will automatically close the gas cylinder valve in case of gas leak.

Upon the conducted research, the adverse effect of working parts in DT-75, MTZ-80 and T-150 K tractor series commissioned in the Republic of Armenia and Artsakh on the soil density and crops yield capacity has been justified. Based on the scientific experiments a method for the determination of maximum permissible specific pressure and optimal number of passes for the tilling machine has been developed.
The introduction of minimum tillage system would enable to prevent the over-compaction of the topsoil, reduce the amount of soil clods in the tuber-soil mass during the harvest time, improve the sifting process of tuber crops and increase efficiency of harvest.

In conditions of circular economy production and consumption procedures are implemented in a closed cycle, which enables to minimize the used resources and ensure zero waste industry. The introduced mechanisms are of high economic, social and environmental significance, since unlike the traditional linear economy, the wastes are turned into production resources in case of closed-loop economy.
Thus, it is more efficient to apply the mechanisms of circular economy in the agricultural sector, as they promote the increase of food security level and protection of population health.

Optimization of a full diet feed mixture is one of the main issues of poultry farming, since the creation of forage base with balanced proteins and nutritional supplements is primary prerequisite for implementing the agri-food program.
Through the optimal solutions of economic and mathematical methods, a new full diet compound feed in compliance with poultry feeding standards, promoting egg productivity has been recommended, as well as ways for the reduction of egg prime cost has been justified and introduced.

Agriculture has a crucial function in the structure of the RA economy, since the food security of population, living conditions and development perspectives of rural community are ensured by the quality and development level of agricultural sector. Agricultural production, like any other type of production, is based on labor, creative minds and on the symbiosis of nature and human innovative ideas.
As effective measures to raise the level of targeted use of agricultural land, a policy of land consolidation, modernization of the irrigation system and a targeted state policy of assistance to the rural population are proposed.

The article discusses frequency of occurrence of mosses and lichens on wild and cultivated fruit trees (apple, pear, plum, cherry plum, cherry, sweet cherry) in the forests of the Marmarik River basin, private farms, as well as in industrial and intensive gardens of the Kotayk and Gegharkunik regions of the RA.
Against the background of sanitary and mechanical measures, a single spraying of apple trees with fungicides completely protected the trees from the mosses and lichens or provided high biological effectiveness. Experiments carried out without mechanical cleaning of trees and with the use of sanitary and chemical measures also showed high biological effectiveness.

Chemical and microbiological preparations have been tested to fight against black locust gall midge (Obolodiplosis robiniae) and sawflies (Euura tibialis). Among the insecticides applied against the sawflies, chemical preparation “Anthio” with 1.7 L/ha consumption rate and Bt 26-70 strain with the dose of 3 L/ha concentrate have provided the highest efficiency, the indices of which were 91.1 % and 90.0 % respectively. In the struggle against the black locust gall midge, relatively higher indices were recorded when applying “Akpelin” preparation (92.2 %) with 1 L/ha consumption rate and 3 L/ha Bt 26-70 strain (82.4 %).

The research aims to study the effect of vines’ load with buds on the growth and yield capacity of “Charentsi” grape variety in conditions of Armavir region.
At the Nalbandyan experimental station of the ANAU branch “Voskehat Educational and Research Center of Enology”, grapevines planted with 2.5x1.5 m spacing and trained to the trunkless multi-armed fan-shaped system with 40, 50 and 60 buds loading were investigated.
Per the studied results of the shoots growth and development, yield amount and quality, it was recommended to use the optimal variant of vines with 40 buds loading for the production of high-quality and best value wines.

Squash is cultivated almost in all agricultural zones of Armenia; anyhow, the agrotechnology of its cultivation is not sufficiently studied yet.
The squash hybrid Aral F₁ has been selected as a study subject for the research work. The effect of different times of seedling emergence under film coating on the squash growth, development and yield indicators has been studied.
Upon the scientific experiments it has been found out that for the early squash harvest in conditions of Ararat valley the seedlings of Aral F₁ or other similar hybrids should be planted under the film-coated area in the first decade of March, which will enable to harvest a rather high squash yield.

The article presents the system of chemical control measures taken to combat the South American moth in the tomato fields of Vosketap community in the Ararat region and Aknalich community of Armavir region in the Republic of Armenia. Ampligo, Belt, Voliam Targo, Quantum, Spintor and Koragen insecticides have been selected and involved in the control system in consistent to the impact nature on the pest’s different developmental stages, mechanisms, body invading characteristics and waiting times.Per the computation of the tomato yield harvested from the experimental plot, the yield surplus in Aknalich community made 411 c/ha, and in Vosketap comminity it amounted to 545 c/ha.

Throughout 2020-2021, in the pepper fields of Khoronk community in the Armavir region, insecticides belonging to various chemical groups, namely Euphoria, Coragen, Decis Prophy, Belt, Decis F-Lux, Movento, Ampligo 150, Vertimec, Proclaim and Spintor, have been experimented for combating cotton bollworm. During the trials their biological efficiency was estimated 1, 5, 10 and 15 days after spraying.
According to the research results, the highest biological efficiency against the cotton bollworm was provided by Euphoria, Belt, Ampligo 150 and Decis F-Lux insecticides.

Investigations indicate that genetic ability of milk productivity in the heifers of Holstein breed makes 10377.5 kg, the average milk yield amounts to 6965 kg, which makes 67.1 % of the overall genetic ability, while the amount of milk fat + milk protein is 494.6 kg. The same indices in the heifers of Fleckvieh breed are 9819.5 kg, 6226 kg, 64.4 % and 446.6 kg respectively.
According to the indices of the ancestors’ milk productivity registered in the breeding cards the mating applied for the breeding of heifers of Holstein breed has a number of advantages over that of applied for the Fleckvieh breed. Thus, to ensure high milk productivity, it is recommended to raise animals of Holstein breed in the farms of Armenia.

The research results indicate that the incidence rate of papillomatosis detected in the udder skin of first-calf heifers kept in 15 farms and subsidiary households of the Kotayk and Ararat regions of Armenia averagely amounts to 32.7 %.
The further treatment of the mentioned disease was implemented through the combination of three medicinal products: 2 % novocaine solution, vitamin B ₁₂ and 10% betadine ointment. As a result of treatment, the animals were recovered without relapses.

Upon the investigations carried out in the regions/marzes of Armenia, it has been disclosed that the organoleptic, physicochemical and microbiological indices of a number of milk samples, sold in different places not intended for their sale, don’t comply with those set for high-quality milk standards; infections with pathogens of brucellosis, tuberculosis and mastitis have been detected in the mentioned samples.
Violation of sanitary-hygienic norms set per milk storage and transportation standards can cause food poisoning and toxicoinfections. Thus, it is recommended that food safety inspectorate bodies should impose and implement control over the private milk sale process at random places.

The research results of unpasteurized and non-factory farmed milk sold at random selling spots are presented in the current article.
In all samples subjected to expert examination, soda has been detected, which means that the milk was adulterated. Nor did the organoleptic indices comply with the accepted standards. In some samples, a suspicious reaction to brucellosis and mastitis was observed. Hence, the milk sale at non-specialized selling spots should be prohibited, as its consumption poses danger to human health and can become a source for the spread of infectious diseases.

Healthy eating from an early age is vital for a child’s growth and development. Therefore, a task has been set to develop a new technology for the production of a new sausage product for children rich in nutrients needed for the body and with safe-health level. Rabbit meat has served as the fresh sausage meat, while the pumpkin pulp has been used (with 15 % optimal portion) as vegetable-based supplement. Such a combination of plant- and animal-based food products promotes the increase of the food’s biological value. At the same time, it boosts up the development of rabbit breeding sector and consumption of local raw stuff.

The demand for high quality and unique wines is eventually increasing in Armenia. Therefore, research was carried out to develop, introduce and improve a technology for rose wine production from “Haghtanak” grape variety in line with international standards.
Throughout the experiments rose ́ wines were produced from the mentioned variety through different technologies and investigations on some physicochemical and organoleptic indices of must and wine material was carried out.
It is worth mentioning that the produced wine is already available in the market and has won positive reviews from consumers due to its unique brand.

A technology for low-lactose (milk sugar) fermented dairy food production has been developed for the people with hypolactasia (lactose intolerance). To reduce the lactose content in the dairy product, enzymatic hydrolysis of dairy raw product has been conducted via Ha-Lactase 5200 enzyme preparation. The main technological parameters of hydrolysis have been determined. Broccoli puree has been selected as a filler with the optimal portion set as 10-15 %.
Production of combined food will enable to expand the range of fermented dairy products.

Getting the necessary nutrients during the food intake is of vital importance for children’s growth and development. This is particularly true for the schoolchildren whose food ration hardly contains any food product with high biological value when eating during the breaks. Thus, we recommend a new range of organic meat product with high biological value and without any preservative agents.