The article discusses the issues related to the duration of the liquid discharge from the pressure pipeline with constant diameter and with a nozzle on its end part. The diameter of the nozzle outlet is smaller than that of the pipeline. In the result of the appropriate transformations, the calculating formulae have been derived with the help of which the duration of the pipeline drawdown is easily determined. The computing results have been compared with the relevant experimental data per received dependences.

A laboratory unit has been developed, designed and prepared to implement vibration cutting in the stems of the plants (cane) in the water medium. The vibro-cutting has been implemented by means of electromagnetic vibrator with toothed and smooth blades. The resistance forces working against the cutting efficiency have been measured and recorded through the latest equipment and Zet Lab computer software. According to the results of empiric studies, the stem cutting in the water medium with the recommended vibration apparatus is implemented with minimum energy consumption.

The efficiency of water resource use in the republic is related to the introduction of irrigation water saving technologies. The comprehensive investigations enable to fundamentally eradicate the skeptical views on the efficiency and feasibility of the drip irrigation system due to the scientifically justified analyses. According to the water management calculations conducted in the community of Nor Artamet in the Kotayk region, it is possible to increase the irrigation efficiency in about 3.7 times, as well as to save water resources of the region by applying the drip irrigation system.

The results of the field experiments related to the self-driving clod-crusher of the potato digger, developed by our research group, are introduced in the article. Upon the experiments conducted in 2019, in the potato fields of Hatsarat community at the RA Gegharkunik region, the theory-driven results have been mostly validated. Besides, the optimal velocity of the forward movement of the aggregate has been also determined (V=1.0-1.4 m/s), which provides effective crushing of the soil clods and minimum yield loss due to the soil humidity and its mechanical properties.

Investigations have been conducted in 20 land plots of the Dashtakar community in Ararat region with the aim of increasing water use efficiency in the irrigation systems. As a result, it has been found out that surface irrigation causes significant water loss. The use of water circulation will enable to reduce water filtration losses; it will also promote efficient water use organization and water resource conservation.

During the investigations the distribution function of the rejects and failures as random variables per correlation analysis has been derived, based on which the risks of the resource indices in the machine parts within the range of α to β have been estimated. The risks of the resource indicators in the complex systems and in their elements have been assessed based on the theory of mathematical statistics. The developed methodology for risk assessment can be also used in the risk estimation of the resource indicators for the agricultural machines and tractors.

Traffic regulation method by applying different levels of transportation hubs in the Arshakunyats-Agatangeghos-Grigor Lusavorich crossroad is presented in the current article. The recommended method for transport stream regulation promotes the traffic safety increase decreasing traffic delays and possible traffic congestions. Besides, it disjoins two and more conflicting directions providing sufficient traffic speed.

The article deals with the analysis of the methods for determining depreciation times and standards in motor transport vehicles. Parallels have been drawn and the regulated constant standards of the motor transport vehicle, as well as its technical-economic properties, particularly parametric indices of the rejects stream have been evaluated. It is recommended to introduce a new efficient system for the estimation of the depreciation standards in the exploitation of motor transport vehicles.

The aim of the current work is to study the detoxification rate of a number of pesticides in the tomato fruit when applying them individually and in the form of tank mixture. The experiments were conducted in the Darakert greenhouse at Masis province. The plants of hybrid tomato “Big Beef” were sprayed with the solutions of cymbush (1.2 l/ha), actellic (2.5 l/ha) and topaz (0.6 l/ha). Upon the research results it has been found out that in case of applying actellic, cymbush and topaz in the form of tank mixture under the protected ground the residual detoxification of the mentioned pesticides takes place more intensively than in case of their individual application.

Groundnut is a nontraditional leguminous crop for Armenia. It is cultivated in small land areas and provides maximum 19 c/ha-20 c/ha yield capacity on the average. It is recommended to implement the groundnut cultivation in the sub-mountainous zones of the Aragatsotn region which will enable to enlarge its cultivation areal and to test some new varieties.

Via the vegetation experiments conducted in 2018-2019 the effect of equal doses of mineral fertilizers, half rotten manure, granulated guano, organomix and “Baykal-EM-1” compost on the plant yield capacity, its aboveground mass, as well as on the content of nitrate and dry matters in the mature fruit of the pepper variety “Nush-55” was investigated. The highest index was recorded when applying manure, while the lowest index was observed when organomix was applied as a fertilizer. In none of the mentioned variants the amount of nitrates exceeded the index of MPC (maximum permissible concentration), which makes 200 mg/kg. Rural farms engaged in vegetable growing are recommended to compost all vegetable wastes with produced manure and to use them in the fields after full maturation (to protect humus reserves).

According to the field experiments it is possible to provide high potato yield in case of applying complexon or 20:20:20 (NPK) at least twice through foliar nutrition after introducing the mineral fertilizers in the soil during the vegetation period. When treating with complexon, the tuber yield surplus makes 91 c/ha – 108 c/ha and 31 c/ha – 46 c/ha respectively as compared to the similar index of the control variant and N120P90K90. The yield surplus has been promoted by the increase of quantity and weight of large and mid-size tubers. The qualitative indices and marketable state of the tubers have also improved. It is recommended to introduce the experimentally justified variant in the production.

The article considers the peculiarities of biomass accumulation and its fluctuation characteristics throughout the plants vegetation period in the rangelands of the three zones on the south-western slopes of Mount Aragats. The highest indices for the above - and below-ground masses have been recorded in the meadow-steppe and subalpine belts, while among the vegetative groups the leguminous plants have been distinguished by the least specific weight. Some regularities related to the formation of above - and below-ground mass and to the changes of plants root system have been disclosed. It is recommended to take measures promoting the efficiency increase in the rangelands and enrichment of plant varieties.

Visceral Leishmaniasis is a transmissible parasitic disease of canids and humans caused by the pathogens from protozoa genus. After a 30-year interval new cases of Visceral Leishmaniasis have been recorded in Armenia since 1999. From September 2015 up to March 2016 canine serological investigations were conducted through rapid diagnostic tests, as a result of which it has been found out that infestation rate in Syunik region makes 9.3 %, in Tavush region - 10.3 %, in Lori region - 11.1 %, while in Yerevan the infectivity makes 4.1 % (on the whole - 7.5 %). It is recommended to implement canine registration and conduct further investigations. It is necessary to intensify the struggle against the stray dogs in particular, as well as to strengthen the interagency cooperation.

Prior to the use of meat semi-finished products, only additional thermal treatment is needed. They supplement the food ration with useful components, such as proteins, fats, carbohydrates and minerals. Thus, in the modern world their production is yearly being expanded. Based on the research results, a new cutlet recipe with the use of cellulose has been established and estimations in technological parameters, energy value and cost price have been conducted.

The main objective of the study is to develop a technology and recipe for new functional bakery products by applying sesame flour. Sesame is rich in vitamins and mineral substances and contains up to 40 % proteins, including essential and nonessential amino acids and histidine. The latter regulates hemoglobin synthesis. The pectins and food fibres of the sesame flour regulate intestinal microflora activating metabolism. When substituting 15 %-20 % of the flour recommended upon the recipe with sesame flour, the finished product demonstrates high organoleptic and physicochemical indices.

The main goal of the current study is to develop a echnology for producing functional bread products from the wholegrain oat flour, which will ensure high nutritional value and required marketable quality for the finished product. According to the research results it is possible to apply the flour produced from the alternative grain in the bakery production and to get high-quality food product. No additional labor resources or material costs are required for the developed technology of bread baking from the oat flour.

The aim of the study is to assess the microbiological safety of ready-to-eat salads sold in supermarkets of Yerevan city. In 12 salad samples the presence of mesophilic aerobic and facultative anaerobic microorganisms (MAFAM), coliform bacteria, E. coli, S. aureus, L. monocytogenes, Salmonella spp., Proteus genus bacteria, yeasts and molds was determined. According to the results, none of the samples of readyto-eat salads meet food safety requirements, hence are dangerous to consumers’ health.