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The experiment considered the influence of different methods of agricultural technologies on the yield of winter barley in the dependence of the investigated factors. Field experiments were carried out in the fields of the central experimental base of the Kashkadarya branch of the Research Institute of Grain and Legumes in the Karshi district of the Kashkadarya region under conditions of irrigated light gray soils. Stationary experience is represented by the following factors: the level of fertility (factor A); fertilizer system (factor B); plant protection system (factor C) and methods of basic soil cultivation (factor D). The relationship between the influence of the level of soil fertility, fertilizer rates, plant protection products, tillage system and yield, and crop structure of the promising winter barley variety Mavlono was determined. It has been established that (fertilizers, tillage, sowing method, means of protection) increases the yield of winter barley and positively affects the elements of the yield structure. The yield increase in comparison with the control changed from 10.4 to 26.8 c/ha. The statistical processing data show that the fertilizer system (35.8%) and soil cultivation (27%) had a certain influence on the number of productive stems; the fertilizer system (44.6%) influenced the spike size, the fertilizer system (28%) and the tillage (32.8%) had influence on the amount of grain in the spike and influenced the mass of grain from the spike. Keywords: winter barley, monitoring, variety, yield, yield structure, regression. Key words: healthy lifestyle, adaptation, rehabilitation, healthy physical education, functional laterality profile, sinistrality, left-handedness, left-handed schoolchildren.

This article presents the results of a study on the introduction of South Korean rice varieties, the influence of transplanting methods on the biometric indicators of local and foreign varieties, as well as the selection of varieties adapted for transplanting method using mechanization.

In planning water reservoirs, it’s significant to understand surface runoff behaviors, especially in medium and small rivers. The article examines water availability results during different watery years of The Chatkal River, which is the biggest left tributary of The Chirchik River. The computation of intra-annual runoff distribution for three different years of watery and for two distinguished periods of watery was carried out. It is derived that independently from the watery of year, 80% of runoff originates in high water period and 20% in the low water period.

The article highlights the unique role of irrigation canals in the supply of water in the required amount, depending on crop demand and the rational use of it. The study of the prevention of filtration in irrigation networks and the study of the existing malfunctions in the operation of irrigation networks, the sequence of works on the repair of irrigation networks were analyzed, and the priority of repair work was determined. The current state of the Khumbuz canal in Khiva, Khorezm region of the Republic of Uzbekistan was studied. Information was obtained and analyzed on compliance with design specifications during construction and the presence of protection zones in the canal design. Analytical indicators have been developed to extend the service life of the Khumbuz canal to ensure its normal operation and supply the required amount of water to crops. In the implementation of water supply to agricultural crops, priority is given to the repair and construction of hydraulic structures, including the Khumbuz canal. In addition, all the work to be done was planned based on the priority of the work. It has been found that the amount of water required to irrigate crops can be achieved uniformly along the length of the canal, at the top, middle, and bottom of the canal, by ensuring that the irrigation networks operate at the required level. Specific scientific recommendations have been given for the normal operation of the Khumbuz canal. Repairing the canal has been shown to increase water use by 20 percent and increase crop yields by 15 percent by ensuring that crops receive the required amount of water on time. The service area of the Khumbuz canal is 1.460 hectares. The length of the canal to be repaired is 6 km. of which 2,568 km of new concrete. The maximum water flow of the canal is 2.5 m3/sec, and the normal water flow is 2.0 m3/sec. The efficiency of the channel (canal) is 0.93. The article provides information on how to achieve efficient use of irrigation water by repairing hydraulic structures at the required level and the construction of new ones.

The technologies used to prepare the soil for sowing potatoes on ridges, consisting of numerous soil preparation operations, lead to loss of moisture, prolonging the sowing period and increasing operating costs. The aim of the research is to develop a machine for processing and preparing the soil for sowing potatoes on ridges. The authors have developed a technology for preparing fields for sowing potatoes on ridges and a machine for its implementation. The basic principles and methods of classical mechanics, mathematical analysis and statistics were used in this study. On the basis of multifactorial experiments, the following parameters are justified: the angle of inclination of the ploughshare blade in the range of 6-70, the height and length of the guiding knife in the range of 94-110 mm and 107.2-136 mm, respectively. The main parameters of the working bodies of the machine and its technical characteristics are given. The results of the tests have established that the proposed machine for preparing the soil for sowing on the ridges reliably performs the specified technological process and its performance indicators fully meet the requirements. The use of the machine provides a reduction in operating costs for processing 1 hectare of area in comparison with the technical means used by 33.8 %.

This article is devoted to such issues as smoothing the schedule of loads of manufacturing factories in the “intensive” periods due to the correct use of the system of tariffs, which is stratified by time. It is possible to achieve smoothing of the load schedule of the energy system through the correct use of the time-stratified tariff system by taking into account the above-mentioned issue. Proper use of the time-stratified tariff system by consumers will reduce the load period of the energy system and change its modes.

The mechanism of influence the UV- radiation biological processes into seeds of agricultural plants is considered. The technical parameters of installation for pre-sowing treatment seeds with ultraviolet radiation lamps for increasing the permeability of biological membranes of cells in seed are defined. The results of experimental researches on have established that for processing of seeds cotton pre-sowing treated with ultraviolet rays, increasing of their germination and productivity of agricultural crops are shown.

The technology of electro-processing by UV-radiation soil of agricultural plants is considered. The mechanism of the effect of UV irradiation to change by redox reactions a chemical potential of the soil is shown. As the result of experimental researches, optimum parameters for processing soils with ultraviolet radiation lamps for increasing the absorption of the most mobile manganese forms in plants are defined.

The article discusses methods for monitoring solar radiation and wind characteristics and practical principles of use. The efficiency of using solar and wind energy largely depends on how accurately the design took into account specific data on the arrival of solar radiation or wind speed at the site of the intended operation of installations. The instability of the primary energy supply makes it necessary to supply the installations with accumulators, the choice of capacity of which also affects the size of the energy receivers, and therefore the technical and economic indicators.

This paper is devoted to the issues such as modelling the design parameters and operating modes and improving the design of micro hydroelectric power plants operating in low-pressure water flow. Taking into consideration above-mentioned issues, it is possible to increase the efficiency of using low-pressure water energy systems. The main dimensions of the water wheel of a micro hydropower plant depend on the water flow velocity v, water volume Q, acting at a fixed point in time on the water wheel blade, and also on the depth of the water level H.

Seedbed preparation to achieve desired aggregate size requires many tillage operations when performed on dry soil. A very common implement used for the initial operation is the moldboard plough, subsequent passes may include disk, chisel ploughs, cultivators, rototillers and harrows. Therefore ploughing should form flat soil surface to ensure favorable conditions for performance of subsequent operations. Mechanical reconsolidation by fragmenting and packing at spot ploughing on dry soils was studied in a soil bin, and on loam soil in the field. The results show that in dry soil fragmentation by ploughing and packing is attained by tearing the natural clods from each other and by stressing and translocating them. The maximum bulk density after ploughing was about 964 kg m-3, after ploughing and packing was about 1071 kg m-3 . Packing considerably reduced soil surface roughness from about 0.12m to 0.04m. Moreover, packing by rolling increased soil fragmentation from about 68.2 % (after ploughing) to 79.8 %. A series of experiments showed that the roller had only a slight influence on draught resistance. The spot ploughing draught were increased about 1.3% at this operating conditions.

Electric energy production in small-scale hydropower stations is attractive from both an ecological and an economical point of view. Technological innovations and measures to lessen environmental impacts make small-scale hydropower stations inexpensive and justified energy sources that provide renewable energy on an independent basis and help not only to protect the environment but also to weaken human dependence on fossil fuels. This study is devoted to finding solutions based on renewable energy technologies and innovations in Uzbekistan. This article is devoted to the development of a water wheel experimental model for the micro-hydroelectric power station. Experimental studies were carried out on the basis of this model and obtained results were used in the preliminary calculations. The results from the calculations showed that the installation can generate 7-11 kWh of electricity per hour, about 168-264 kWh of electricity per day and 61 to 96 MWh of electricity per year.

This paper presents the results of calculations to reduce greenhouse gas emissions in agricultural sectors of the Republic of Uzbekistan within the framework of the project: “Sustainable Agriculture Development and Climate Change Mitigation”. The initial data were the characteristics of the implemented installations based on renewable energy sources for the period of 2014-2018. Most of these installations were biogas settings based on the principle of anaerobic fermentation, as well as solar water heating and photovoltaic stations. The calculations were performed according to the “AMS-III.D” and “AMS-I.J” methods by the “Global Environmental Fund” experts. The developed computer programs were applied to calculate the arrival of radiation and the duration of sunshine during the year on the territory of Uzbekistan. According to the calculations, the reduction of greenhouse gas emissions was 1338840.5 tons of CO2 for the indicated period during the operation of installations based on renewable energy sources. Within the framework of this project, the total potential of generating electric energy from biogas settings and solar photovoltaic stations at the amount of 10,424 MWh was estimated.

The article deals with the results of the calculation of annual evaporation losses from the open water surfaces of reservoirs of Uzbekistan. For the estimations, we used the formula of the dependence of the temperature of open water surfaces of the reservoirs with the air temperature and average depth of them, and the tendency of air temperature change over time. The relationship between the wind speed above reservoirs and the weather station was defined.