Tipik bo'z tuproqlar fosfotlari fraksiyaviy tarkibining lalmikor dehqonchilikda o'zgarishi

The article presents the results of studies of the fractional composition of typical gray soils of the Tashkent region and their changes under the influence of rain-fed agriculture. Studies have shown that the main part of phosphates of typical serozems are mineral compounds of phosphorus. The composition of mineral phosphates is dominated by highly basic phosphates. The content of polybasic phosphates is significantly less than high-base phosphates, while their content

exceeds the content of loosely bound phosphates. The use of typical serozems in rain-fed agriculture leads to insignificant changes in the fraction of calcium phosphates, there is only a tendency to increase their content. The content of loosely bound (Ca-PI) and polybasic (Ca-PII) phosphates increases significantly