Abstract
This paper notes the geographical location, soil and climatic conditions, geomorphological and geological structure of Jizzakh province, as well as the agrochemical status of newly irrigated light gray soils formed in Arnasay district of the province, nutrients and their balance in the autumn glaciers. According to the results of chemical analysis, it was found that the mechanical composition of the studied soils consists of light sandy and loamy soils, in which fine sand particles (0.5-0.05%) predominate. The study showed that in the driving layers of newly irrigated light gray soils, humus was present at 0.823-0.936%, total nitrogen at 0.059-0.084%, total phosphorus at 0.096-0.135%, and total potassium at 1.05-1.36%, humus and mobile nutrients. It was noted that they belong to very low and low-income groups according to their level. The amount of mineral and local fertilizers applied to winter wheat, the residues of winter wheat and the amount of crop and stem (straw) grown in relation to the amounts that fall into the soil by natural means is high (N-15.1 kg/ha, P-3, 6 kg/ha, K-34.4 kg/ha).
Highlights
In recent years, as a result of rapid use of land resources around the world, including in Uzbekistan, there has been a decrease in humus and nutrients in soils [1, 12]
The province has light brown meadow steppe soils (1%), brown soils (10%), dark gray soils (13%), typical gray soils (23%), light gray soils (7%), brown soils, barren soils. and other soils (36%) [11]. 0.44% of the soils distributed in the province are clayey, 7.13% heavy, 49.56% medium, and 32.52% light sandy, 8.13% sandy and 2.15% sandy mechanical soils
The content of humus in the driving and subsoil layers of the soils of this pilot area ranged from 0.741-0.936%, total nitrogen to 0.054-0.084%, total phosphorus to 0.0910.135%, total potassium to 0.86-1.36%, and they gradually decreased towards the lower layers (Table 2)
Summary
As a result of rapid use of land resources around the world, including in Uzbekistan, there has been a decrease in humus and nutrients in soils [1, 12]. There is a lack of some elements in the soil for the nutrition of agricultural crops. One of the main reasons for this is the violation of the law of reduction, as a result of the irreversible release of nutrients from the soil every year, and in some parts, irreversible release of nutrients [1, 2, 13]. A number of negative processes are allowed to develop in the soil. It is clear that soils are being degraded [3, 13, 14]
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