The mathematical link between the drive mechanism of the clod crusher in the potato-digger and the resistance area in the grouser bars has been established. It is recommended to install 10 or 11 grouser bars on the drive drum with inter-bar angles of 330-360 respectively so that the total resistance area of the simultaneously anchored grouser bars in the soil would make 0.03 m2-0.06 m2.

The calculation theory for establishing the regularities of the changes in the friction and wear values during the interaction of the working surfaces of plows and furrow slices of different soil types has been developed. The mathematical model of the relative slice movement trajectory along the surface of the recommended trenching plough with semi-digger plough body and obligatory provision of furrow slice slip has been designed. This enables to determine the upper limit of the external friction angle in the soil and the vertical coordinates, where friction and wear reach the maximum point. The exact limits of the optimal values in geometric parameters of the working surface have been established.

Laboratory researches have been conducted on active rotor clod crusher of potato digger as a result of which the optimal experimental parameters of clod crusher were specified, particularly those of the angular speed which should be higher than о = and its parallel speed- higher than V= 1,2 m/s. The weight of clods higher than 15 mm per 1 m2 soil area was chosen as an indicator for the evaluation of the efficiency of the recommended clod crusher. The results of laboratory researches have shown that the increase of parallel speed in the clod crusher has positively influenced the clod crushing process.

Erosion processes are intensively developing in the territory of Armenia. To reduce the intensity of this phenomenon horizontal terraces are built, where agricultural crops can be grown. In order to reduce erosion caused by surface irrigation, specification of the parameters in the irrigation technique is required. To this end, it is necessary to reduce the length of the water run with the help of shortened furrows. The latter make it possible to regulate the water runoff amount resulted from atmospheric precipitations and to accumulate the needed moisture amount in the soil.

The article discusses the main reasons limiting the use of single-row potato diggers in the slopes with steepness higher than 20-30. In order to provide efficiency of these machines in the slopes with higher steepness, it is recommended to make such constructive changes which would ensure their efficient operation, so that during the work of the units, regardless of the degree of slope steepness, the blade of the ploughshare remained parallel to horizontal plane. Computing formulae for determining the main structural and technological parameters of the reconstructed machine have been derived.

In the contemporary potato planters spoon-chain sowing devices are used, the main parts of which are the belt and stars; throughout operation they damage potato tubers, particularly the vernalized ones. We recommend a spoon-chain sowing device without almost any flaws. Studies have enabled to identify the position of the conveying pipes of the seed sowing device, providing tuber's transportation to the bottom of the furrow.:

The article is devoted to the study of resource indicators of parts and mechanisms in the disk brake system, as well as to the identification of regulations for resource distribution of the piston in brake mechanism and guiding caliper fingers. Based on the study of exploitation conditions and the characteristics of failures and malfunctions, technological operations have been proposed to increase the resource indicators in the parts of disk brake mechanism for the minibus of Gazelle series.

The article considers the practical application of the method of calculating absolute indicators for assessing the financial sustainability of a production company based on the data of “Proshyan Brandy Factory” LLC and “Vedi-Alco” CJSC. Based on the analysis, the provision rate with resources and cost formation sources have been estimated.

The article is devoted to the identification of the development trends for viticulture in Vayots Dzor marz. Studies indicate that during the period of 2012-2017, the area of vineyards increased in 1.8 times, and this growth shows a stable dynamic tendency. According to our estimations, this is a high indicator, which can serve as an important prerequisite for the further development of viticulture. Vayots Dzor marz has a sound potential in viticulture that remains still unused.

The analyses of Vine and Wine-Making product market and its economic relevance indicate that within 2014 and 2017 the sizes of product consumption in internal market of the Republic of Armenia are almost constant, while its exportation rate is increasing. In the current state of world wine-making techniques. Armenia has a great opportunity to take a specific position in the world wine market under the guidance of targeted state policy.

Managerial accounting in the food processing organizations currently provides information only on the basis of factual expenditure flows, which does not fully control the cost price formation. Therefore, there is a need to improve the monitoring functions in managerial accounting by establishing accounting of cost flows according to responsibility centers, values of estimates and their deviations. Such reports will promote suitable and timely managerial decision-making and increase the effectiveness of internal control in food processing companies.

I n the modern market economy information technologies are of paramount importance in all activity areas due to their substantiated effectiveness. Nowadays IT plays an important role in the state system forming new electronic management versions. Currently the process of introducing e-governance in Armenia can be considered as already launched, but it is still necessary to take appropriate measures to ensure its high efficiency and solve problems in this area.

Formation and development of organizational infrastructure is considered as a way of increasing the sales performance of agricultural products in Armenia. The scheme of organizing purchase of goods has been studied. It is proposed to introduce well-defined and regulated models for the purchase and sale of agricultural products in Armenia. Thus, formation of a system of agricultural wholesale markets and provision of their legislative base are considered, where the interests of farms and consumers are taken into account. “Yerevan wholesale market” program can be implemented in 2020-2022, with а wholesale market and about 7-8 receiving points. Return on investment can be expected in 12-15 years.

The article discusses the role of the state in regulating the activity of natural monopolies. Based on the peculiarities of the energy sector, we have analyzed market mechanisms for determining regulatory expenditures in this sphere. It is suggested to apply such incentive regulation tools in the Republic of Armenia that will enable to stimulate a natural monopoly entity to invest and at the same time to ensure stability in terms of effects on tariffs.

In this research the specifics of the GDP distribution and the unemployment rate, as well as the intensity of changes in the ranks and their interrelationships for 2015-2016 have been analyzed. It should be noted that for the first time in 2017 the NSS of the RA (currently the SC of the RA) calculated the GDP for regions (i.e. the gross regional product). According to the results of the analyses the GDP per capita has been characterized by obvious polarity. Taking into account the correlation between the GDP per capita and unemployment rate the correlation between the ranks of these indicators has been studied.

The aim of the current research is to obtain domestic intergeneric hybrids, to assess their morphological, anatomical, biological and economic characteristics and to identify their perspective forms for further use based on the Belarusian varieties of black currant and gooseberry. Intergeneric reciprocal crossbreeding of black currant with gooseberry was aimed at the production of thornless and semi-thornless gooseberry with a high content of vitamins and large-fruited currant resistant to gall mite. To overcome the sterility of amphihaploids, they were transferred to tetraploid level by colchicination. Hybrids of R. nigrum x Gr. reclinata with different genomic composition have been bred.

Plot and production experiments have shown that high biological efficiency is provided when using tank mixtures of water suspensions of bacterial (lepidocid, BTB) and chemical (belts, ephoria) preparations against younger (II- III) caterpillars of brown-tail moth in the apple orchards at Carbi community with the concentrations lower than the lethal doses in 1/4 times. As for caterpillars of medium (IV-V) and older (VI-VII) ages, high biological efficiency is observed when using chemical preparations in sublethal doses (1/4 of the lethal one) with bacterial preparations in lethal doses.

In the first article of the presented series results of diallel analysis of seven tobacco varieties of “Samsun” species have been introduced which have proved that the genetic factor in the rate of photosynthesis is largely influenced by the effect of additive genes, which have demonstrated recessive character against the variety with high indices. Related to the existence of positive, high genetic correlation between the mentioned property and size and quantity of leaves, the abovementioned features have been observed as a means of identification of perspective genotypes endowed with high index of photosynthesis rate in the older hybrid generations. The research outcomes have indicated the specific ways for optimal selection of aromatic tobacco varieties.

The aim of the research is to assess risk of copper content in vegetables and fruits consumed by population of Alaverdi city. Cu content was determined in investigated fruits and vegetables, dietary assessment was carried out and daily intake of Cu (EDI) was estimated. Target hazard quotient (THQ) and hazard index (HI) were calculated as well. The results of the study have shown that the simultaneous consumption of the investigated fruits and vegetables can cause potential health risks to populations health. :

The milk yielding capacity of the first- calf Holstein cows imported from Lithuania and kept in the specific cowsheds of the “Agroholding Armenia” LLC farm at the Lori region, RA, has made 6570 kg, the milk fat content - 4.2 %, protein - 3.32 %, live weight - 542 kg and the milk productivity coefficient - 12.1. According to the bonitization instructions the imported cows have considerably surpassed the standard indices of the Holstein breed, as well as their mothers bred in Lithuania in terms of milk productivity, fat and protein content, as well as in that of live weight. Thus, there is a feasibility for their further import and breeding.

In order to develop preventive measures against the cattle disease of monieziosis in Shirak and Vayots Dzor regions of Armenia soil and grass samples from the stock watering and resting sites have been taken. The studies of the samples were aimed at the disclosure of oribatid mites which are intermediate hosts for monieziosis pathogen. The latter are found in the soil and vegetation cover from the early spring, thus the epidemic culminates in summer fading away in the autumn months.

Epidemiological situation in the monkeys infected with pasteurellosis was investigated for the first time at Yerevan Zoo, Armenia. Climatic conditions of the zoo have contributed to the secondary pasteurellosis infection and local epidemic outbreak. Studies have shown that the infection propagates not only through infection carriers but also through infected water and food. Infectivity of pasteurellosis causative agents isolated from monkeys have been determined through biological methods on the white mice the mortality rate of which has made 83,3 %. Api 20 NE test has resulted in the detection of serotypes “A” and “D” and further propagation of infection has been prevented through special measures.