The research was conducted over 50 ha uncultivated land areas located in the Noramarg community of the Ararat region to evaluate their meliorative state. The fluctuation rates of groundwater level throughout the whole year and the soil physicochemical properties have been assessed, as well as the amount of water-soluble salts, mobile forms of micronutrients and many other properties have been determined.
According to the results of conducted investigations the land areas rich in affordable nutrients and micronutrients, as well as those provided with groundwaters can be used for horticultural purposes.

During the rotary soil tillage the blade of vertical cutter is constantly in the soil mass. In case of rigid attachment of the blades, the setting angle is selected so that in the most loaded part the cutting angle is in the optimal value range of 20-30^o. At the same time, in the remaining parts of the trajectory, especially behind the frontal section, the cutting angle reaches unacceptable values and the already cultivated soil is raked with the inner blade of the knife.
The article considers the theoretical impact of individual factors, such as blade width, cutting-point angle, kinematic parameters and cutter diameter on the value of the blade cutting angle.

The issue of forecasting soil moisture capacity using differential equation of moisture transfer in the aeration zone has been considered. An analytical approach for estimating moisture capacity per the depth of active soil layer in the irrigation period has been recommended. The obtained outcomes can be used for different soil types with various physicochemical and hydrophysical properties. To make the recommended approach more demonstrative the results of some numerical computations are introduced at the end of the current work.

The article considers the introduction of a coordinated management system for traffic organization on the Mashtots avenue - one of the heaviest traffic roads in Yerevan.
According to the conducted studies, introduction of the recommended system would enable to increase the traffic safety on the mentioned avenue, reduce transport delays and number of stations, as well as to avoid congestions and reduce the environmental pollution.

Evaluation of gross yield indicators in grain and leguminous crops and the study of current issues, on the whole, enable to disclose the supply formation tendencies and structural shifts in the grain market of the RF.
Based on the studies, it can be inferred that the efforts of state and private sectors aimed at the increase of grain production dimensions have been efficient over the past years. Nevertheless, it is also necessary to solve the problem of ensuring stable supply in the grain market, as well as to use the potential of still lagging regions in the republic.

The article considers the current situation of state-funded agricultural insurance in Armenia, some pressing issues and ways of their solution. Based on the analysis of the indices recorded in the sector of agricultural insurance the loss rate has been estimated and clear evaluation has been conducted.
Upon the accomplishment of the introduced recommendations it would be possible to avoid the regular development deviations in the sector of state-funded agricultural insurance in Armenia and to ensure secure continuity of the implemented program.

Throughout conducted investigations eight species of phytopathogenic micro-organisms in the bulb onion were detected.
The local onion variety “Khatunarkh” is mainly infected with bacterial soft rot and rarely with gray and black rots (total infectivity
- 18.4 %) during the storage period, while the Russian onion variety “Karatalski” is mostly infected with black rot and more seldom with bacterial soft and gray rots (total infectivity - 28.5 %).
Unlike the bulbs of “Khatunarkh” local variety, those of the Russian variety “Karatalski” infected with bacterial soft rot and aspergillosis germinate prematurely during the storage time.

According to the investigations conducted in the Yerevan parks and public gardens, the growth and development of the fragrant tree species are retarded due to the life activity of Obolodiplosis robiniae (black locust gall midge), Euura tibialis (sawflies) and Halyomorpha halys (brown marmorated stink bug); they also lose their decorative appearance. Besides, favorable conditions are created for the development of other pests.
The results of trials have indicated that the mentioned strains of BT microbiological preparation are rather effective, and hence can be applied in the planned and integrated struggle against E. tibialis, O. robiniae and H. halys.

Investigations have been conducted to evaluate the biogenic load of water ecosystems caused by harmful emissions from the settlements near the catchment basin of the Lake Sevan, livestock farms and complexes, rangelands, as well as from coastal flooded areas.
According to calculations, residual amount of biogenic elements (nitrogen, phosphorus) is accumulated in water ecosystem in case of positive lake water balance, which gets increased parallel to the continuous water level rise. Hence, discharging the biogenic elements from the streams flowing into the lake and cleaning the flooded areas are considered to be priority measures.

In 2018-2020 the industrial extraction of primary nutrients from the vineyards of grape varieties “Kangun” and “Haghtanak” cultivated in the Talvorik community of Armavir region was investigated in conditions of bare fallow system of soil conservation. According to the investigations, in case of 7 t/ha yield and vegetative mass of the “Kangun” variety, 35 kg N, 9 kg P₂O₅ and 34 kg K₂O is extracted, while in case of 10 t/ha yield and vegetative mass of the “Haghtanak” variety 49 kg, 15 kg and 67 kg respective nutrients are discharged.
In bare fallow conditions non-industrial nutrient losses are also recorded, which should be considered when determining the doses of fertilizers.

The article considers the research results conducted within the period of 2019-2020 in the greenhouse farms of different communities in Armavir region. During the detection of harmful and useful pepper entomoacarifauna, 17 pests and 11 useful insect species were recorded and identified.
Among the useful insects, two genera - Cryptolaemus montrouzieri and Euplectrus - have been recorded for the first time in Armenia.

Long-term experiments have been conducted at the testing station of G.S. Davtyan Institute of Hydroponics Problems (Ararat plain) and in hydroponic conditions of Dilijan forest belt. Soilless growing biotechnology for saplings of oriental plane tree has been developed.
Growing index of the saplings produced in Ararat plain has exceeded that of grown in Dilijan forest belt in 2.0-2.3 times. The biotechnology developed for the production of plane tree saplings in hydroponic way is rather effective and perspective. Thus, it is recommended to apply it in the fast track procedure of large-scale saplings production.

The article discusses synthesis method of sex pheromones as low-molecular weight bio-regulators, as well as their application efficiency in combating pests of the agricultural crops.
According to the conducted investigations, the sex pheromones are non-toxic, do not cause any environmental pollution; they are also ecologically safe and economically efficient. Hence, in case of industrial production they can be widely used in agriculture - forestry, greenhouse and other farms.

Estimation of the cattle’s body condition per the standard enables to control the general state of the animals and storage of the reserve substances in their bodies. The body condition is rated through 1-10 scoring scale system. According to the weather conditions and physiological state, the average body condition of the herd’s cows is estimated as 5-7 points, while emaciation and overfeeding - 3-8 points accordingly. The mentioned scoring system is applied for the productivity estimation in different breeds of beef cattle and their crossbreeds.
The studies are still in process and the findings will be published in the upcoming articles.

The research was carried out in 2019-2020, which is aimed at the development of efficient ways of treating and preventing ascites in broilers. Experiments were conducted with 4-5-week old broilers (500 heads).
A group of ascites-stricken chickens was treated with Biotronic Top preparation, while the other group was treated with the recommended Termovet preparation. At the same time medications intended per the basic scheme for the disease prevention were administered. Hematological investigations were also carried out. The clinical indices in the poultry of the second group were regulated much faster than those of the first one, which proves the high health properties of Termovet preparation.

The research aims to determine the content of growth promoters, particularly residual hormone content in the meat samples of fish bred in the large artificial pond farms of Armenia and to assess their dietary exposure.
The residual amounts of growth promoters were detected through the enzyme-linked immunosorbent assay method and confirmed upon the liquid chromatography–mass spectrometry method. In some fish samples the hormone content exceeded the permissible level, but no health risks were found as a result of fish consumption.
It is recommended to strengthen the state control in order to prevent the illegal usage of prohibited growth promoters in fish farming.

Based on the epizootological research conducted in eight communities of four Armenian regions the prevalence rate of viral diseases of larva sacbrood and chronic bee paralyses has been determined. High infection rate has been recorded in the Syunik region. The clinical signs of the larvae and bee detected in the infected beehives coincided with the symptoms of the mentioned diseases.
Bee deaths can lead to the yield reduction and cause damage to agriculture. Thus, it is necessary to detect the common viral diseases and develop efficient struggling measures.

The research aims to detect the possible cases of subclinical ketosis in the heavy milk producing cows bred in the regions of the RA and to provide professional support to the farmers.
Clinical and laboratory tests of the animal blood, urine and milk were conducted in the farms by using Lestrade’s and Liben’s methods, as well as URIPATH-10 and SERVOTEST-KETOLAC tests.
All cases of identified ketosis were induced by protein overfeeding and lack of digestible carbohydrates in the feed ration.
For curative purposes it is recommended to supplement the food ration with easy digested carbohydrates and administer 5 % glucose solution, E-selenium and dexamethasone.

The grain market is currently being expanded due to the technological development. The new and nontraditional bread types are in great demand now.
When applying supplemental raw materials during the research, such as spelt flour and mint extract, fermentation and maturation times are reduced, and high quality, useful bread products with high consumer properties are produced. Besides, no additional technological equipment and investments are required.
Thus, the recommended functional bread production technology can be introduced in the production sector.

Drying is a fruit and vegetable processing technological procedure as a result of which food products with up to 1 year shelf life can be manufactured. Safety indices of the dried fruits and vegetables should comply with the stated standards.
As a novelty, the raw material, to be dried, was treated with sodium pyrosulfite. The latter’s properties and chemical composition was studied, and after drying of fruits, expert examination was conducted. Unlike the sulfur powder, the processing with sodium pyrosulfite is much safer; besides the natural color of processed product is preserved and the drying time is reduced by 2-3 hours.