Distribution of the forms of reserves of humus in typical seroms formed in geomorphological areas Tashkent-Keles

Abstract The article presents the effect of humic substances on the physical, water-physical, and chemical properties of the soil, as well as the release of various forms of humus reserves (total, potential, near, direct). Each form of reserves of humus formed organic substances and their different differences in the composition of humus the soils of the serozom belt of healed, newly irrigated, and old irrigated soils, accumulation of humus content and distribution in the layers of the section profile, changes in the forms of humus reserves in the genetic horizons of the soil. In a typical irrigated sierozem, the content of potential reserves of humus and in the same row the proximal, direct forms of reserve increases. In the soil profile at a depth of 0-120 cm, the potential reserve of humus ranges from 42,88 % to 29,60 %, the closest one is from 49,32 % to 57,20 %, the immediate reserve from 7,80 % to 13,00 %. These figures show that over the years, the use of soil for irrigated agriculture, the degree of their cultivation and the amount of watering aggregates increased.

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