The stability of moulder stroke affects the uniformity compaction of soil ridge. It depends on the mounting system of molder to the frame and the direction of act-ing forces on them. The aim of the study is to analyze the stability stroke of cot-ton seeder molder. The longitudinal stability of molder in a fixed system of coordinate dependency on acting forces on it, as well as its constructive parameters, have been considered. There has been obtained the equation for the determination of angular deviations of leads of parallelogram fastening system from the initial position under the influence of applied to the moulder forces, constructive parameters of sections, and unevenness of soil surface. It has been established that the fluctuation of links of the parallelogram mechanism is mainly influenced by the weight of mass of moulder system, soil resistance forces, the initial angle of links inclination and force pressure of the spring group. The stability of moulders work is ensured mainly by changing due to the changing force pressure of the spring group.

This research focuses on determination of irrigation — drainage networks conditions, salinity of irrigated areas in Shavat district of Khorezm region (Uzbekistan) by geospatial analysis and giving recommendations for their elimination. Additionally, obtaining monthly ground truth data from observation wells and interpolate them with IDW interpolation algorithm methods of Geographic Information Systems (GIS) technologies in order to monitoring changes of groundwater level and mineralization in vegetation period of main agricultural crops are highlighted. Besides that, by using remote sensing technologies, the obtained data about the irrigation regime was determined in agricultural areas. As a result of the usage of GIS and RS methods, there have been created thematic maps on analysing salinity of soils, the actual condition of irrigation and collector of networks, actual level and mineralization of groundwater as well as their dynamic changes. On the basis of the obtained results, there have been given recommendations for improving the conditions of ameliorative arable lands on keeping the level of groundwater at a specified depth and cultivation of agricultural crops in periods of water scarcity.

The research aims to study and analyze the physical-mechanical and technological properties of eroded soils in Uzbekistan. The data on the susceptibility of water erosion to sloping lands is presented. The average monthly indicators of precipitation over the last ten years in Uzbekistan are analyzed. The results of determining the moisture, density, and hardness of the soil of slopes are presented. It has been established that with the traditional technology of tillage on moisture, density, and other technical properties of soil of slopes, water erosion and slope of fields have a significant effect. The physical-mechanical and technological properties of soil of the arable and subsurface layers of the soil of the top, the middle and lower part of the slope in spring and after grain harvesting differs significantly: in the spring period, the moisture of soil layers 0-10; 10-20; 30-40; 40-50 and 50-60 cm of the lower part of the slope is more moisture content of these layers of the top respectively, 1.16; 1.24; 1.1; 1.4; 1.54 and 2.15 times. Approximately such a picture of moisture is preserved after grain harvesting as well.

This article presents an optimized version of a drip irrigation system based on semiconductor sensors. In this study, the organizational parts of the drip irrigation system based on semiconductor sensors are fully automated, namely: control of the water base, water volume in the pipe, water velocity in the pipe, soil moisture, salinity, temperature, ph of hydrogen content in the soil, pressure regulator valves. The electrical properties of a drip irrigation system based on semiconductor sensors have been proven, on the basis of which a semiconductor material can achieve an optimal result. The system provides economic indicators for one hectare of land and an analysis of the complete replacement of imported products.

In the given article the state of Kharshi pumping station, which is considered as one of the huge pumping stations cascade in Central Asia is described through analysing and visualising the geographic information systems (GIS) and remote sensing (RS) methods. As data there were used Shuttle Radar Topographic Mission - SRTM and high-resolution optical images of the area, provided by ESRI. For data processing and visualization, there was used the software of ArcGIS 10.5 by ESRI company and the results were obtained. At the same time the geographical location of pumping stations and water elevating points and the state of water flowing canals were analysed remotely along with the results from the cross-sectional area of cascade were obtained. In assessing, the accuracy of results it was compared with the data based on field search work and the obtained results from the distance showed 86% accuracy.