U juraev1, b atamuradov

The purpose of the study: In the researches, the mechanical composition of Kogon District of Bukhara region was carried out in order to improve the melioration condition of lands on heavy, densified and gypsum soils, to ensure the humidity, air, salt and water regime favorable for the growth and development of plants (Table 1). in the 1st variant, deep softening works were carried out in 35 sm layer, In the 3rd variant, up to 80 cm deep softening and plowing up to 35 sm cm layer and in the autumn and winter periods after plowing, saline was washed until the chlorine ion content in the soil reached 0.01%, and in the early spring, observations were made on the cultivation of Bukhara-102 varieties of cotton. Bukhara-102 variety of cotton was planted and observed.


Table 1Experimental system

Variant	Mechanical composition of the soil	Plowing	Saline washing	Pre-irrigation soil moisture, %
1	Heavy sand, gypsum soils	Plowing the soil 35 cm (Control)	Saline leaching in the soil in autumn-winter until the chlorine ion reaches 0.01%	70-75-65 %
2	Heavy sand, gypsum soils	loosen to a depth of 60 cm before plowing	Saline leaching in the soil in autumn-winter until the chlorine ion reaches 0.01%	70-75-65 %
3	Heavy sand, gypsum soils	loosen to a depth of 80 cm before plowing	Saline leaching in the soil in autumn-winter until the chlorine ion reaches 0.01%	70-75-65 %