Vol. 2 No. 11 (2022)

The paper presents the quantity and quality of salts in the solonchaks of Central Fergana. Soda was found in the profile of solonchaks in the amount of 0.08-0.19%. Solonchak vegetation is characterized by high ash content, while it is found that in salt marshes of the desert zone, arsenic accumulates in the amount of 7-8 CC, the biological absorption coefficient is 1.17-11.9.

At present, research and development activities aimed at developing new scientific and technical solutions for the effective use of land resources, the organization of optimal use of agricultural land in areas affected by erosion and at risk of erosion in land development projects are being carried out. In this direction, among other things, reducing the harmful effects of the environment in areas with the risk of water and wind erosion, improving the methods of effective use of each plot of land, taking into account the natural and economic conditions and the requirements for the protection of land from erosion, geosystem complexes that allow to prevent erosion in land formation. development, efficient use of land, protection of soils from erosion, creation of technologies that allow to increase the productivity of land is considered urgent. In this regard, special attention is paid to studies aimed at improving the efficiency of work in determining the composition of land types attached to land users and methods aimed at their optimization. Based on this, the main task of today's region is the wide use of modern economical technologies and the possibilities of their application to production, analysis of problem solving, and elimination of excess costs.

Soil properties can vary to some extent depending on the geomorphological conditions in which they are located. This is due to the diversity of parent rocks, layering and mechanical composition of the soil. The article presents and compares the properties of irrigated gray-meadow, meadow and marsh-meadow soils located on terraces I, II, III of the Syrdarya River. Based on the results obtained, recommendations are given for the rational placement of plants.