To improve the reclamation state of the land, a big role is played by a horizontal horizontal drain, which does not give for raising the level of groundwater and collect salt water during irrigation. For the protection of drainage from destruction and flushing, an important role is played by the compaction of the ground, which inside trench. The article addresses the issue of ground compaction in trenches of closed drains. The article gives the advantages and disadvantages of the existing methods of compaction of ground in trenches of closed drains, the results of a study of methods of compaction of ground in trenches of closed drains showed that backfilling and compaction of the ground is done separately, these operations must be performed simultaneously, this article gives the design of a compaction device that must be performed simultaneously, the basis theory of ground compaction, the results of laboratory research, the results of the study determined: acting ground force on the surface of the sealing blade (F = 12 kN/m 2), the outer diameter of the sealing blade (Dou = 300 mm), the inner diameter of the sealing blade (Din = 600 mm), the coal between the blades (ϕ = 15 … 30°), the rotational speed of the blade shaft (n = 360 tu/min), degree coefficient (Ks = 1,22) of ground compaction, ground density ρg = 1375 kg/m 3).

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The authors noted the disadvantages of the 3-wheel universal row-crop tractor. To eliminate them, LLC Design and Technological Center for Agricultural Engineering developed a 4-wheel universal row-crop tractor with variable ground clearance.(Research purpose) To determine the pressure change in the hydraulic system and the transfer time of the rear axle from one type of clearance to another.(Materials and methods) The authors showed that the rear axle clearance could be changed using a special mechanism - with minimal labor costs, without the use of lifting equipment and assembly and dismantling works. They explained that the mechanism was driven by a working hydraulic cylinder. The experiments were carried out on a prototype tractor with adjustable ground clearance, equipped with a separate-aggregate hinged system at an engine speed of 1200-2000 rpm (revolutions per minute). M10G2K oil was used in the hydraulic system, heating it to 65 degrees Celsius (at an ambient temperature of 33-35 degrees Celsius).(Results and discussion) The hydraulic system consisted of an NSh-32 hydraulic pump, a P80 hydraulic valve, two Ts50-200 working hydraulic cylinders, a double-acting hydraulic lock, a hydraulic tank, filters, hoses and high pressure pipes. At the inlet and outlet channels of the working hydraulic cylinders, which activated the mechanism for changing the rear axle clearance, hydraulic locks were installed, and diaphragm pressure sensors model SS302 from Sendor Sensor with a measurement range from 0 to 40 megapascals were placed along the hydraulic line connecting the hydraulic locks with the hydraulic valve.(Conclusions) The authors determined that the time for transferring the rear axle from low clearance to high was 2.2-4.4 seconds, and the pressure in the hydraulic system was 3.8-16.4 megapascals at an engine speed of 1300-2000 rpm. It was found that when transferring from high to low ground clearance, these indicators amounted to 1.0-1.4 seconds and 0.99-9.90 megapascals.

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Analysis of geological prospecting, geological surveying, geochemical and other materials of the territory of the Malguzar Mountains allows us to note that here the ore-bearing formations are Silurian formations (sandstones, gravelstones, shales), crumpled into folds, which are complicated by a series of faults of north-west strike, zones of splitting and etc. These structures are rectilinear, their zone is characterized by the presence of small fracture structures, areas of swellings (Liyagun mineralized zone) and splits (Ardakshan area). The reason for these swelling and splitting, where gold mineralization is noted, remains not fully studied. The importance of studying these features of ore-controlling faults is determined by the confinement to their zones of gold mineralization and geochemical halos of the main 5 ore chemical components. Consequently, the identified ring structures of the Malguzar Mountains are signs of deep granitoid magmatism, with which gold ore mineralization is genetically related. In the course of the study, linear structures of northeastern striking were established, which, together with northwestern and sublatitudinal faults, form the block structure of the study area