Relief, physico-mechanical and technological properties of soil in the cotton growing area
Annotatsiya
Abstract The aim of the study is to study and analyze the physical, mechanical and technological properties of the soil of the cotton growing zone. The results of determining the relief of cotton fields, physical, mechanical and technological properties of takyr soils and gray soils, and the most common in areas of cotton cultivation are presented. It was found that before plowing, cotton fields have a pronounced uneven relief, characterized by the presence of ridges and irrigation furrows. The average height of the ridges in fields with row spacing of 90 and 60 cm is 17.1 and 12.8 cm, respectively. The physical-mechanical and technological properties of the soil of the arable and sub-arable layer of a cotton field along the track of wheels differ significantly from the soil between rows without a track of wheels and a ridge: the density of the soil along the track of the wheels of light gray soils reaches 1.78 g/cm 3 , and of takyr soils - 1.51 g/cm 3 , which is respectively more than the density of the ridge soil by 0.24 and 0.16 g/cm 3 ; the resistance of light gray soils to shear is 1.4 and 1.2 times greater than to rupture and torsion, and takyr soils - 1.33 and 1.15 times, respectively; density, hardness and resistance of the soil to various deformations has a maximum value in layers of 15-25 cm along the track of the tractor wheels.