CHANGES IN SOME INDICATORS OF SOIL FERTILITY OF AGRICULTURAL USE IN THE CONDITIONS OF KOSTANAY REGION

southern chernozem; ordinary chernozem; morphological features of soils; agricultural use soils; soil cover; humus; nutrient elements.

Abstract

The article discusses the change in the nature and fertility of chernozems with prolonged use in agriculture of Kostanay region, under the influence of anthropogenic load. As a result of the study, the current state of ordinary and southern chernozems was assessed, recently, due to the extensive use of chernozems in agriculture, the reclamation state of soils has deteriorated, the areas of eroded soils and other reverse processes have increased. Over 32 years of the use of ordinary and southern chernozems in agriculture, the physico-chemical indicators of soils have undergone significant changes. The humus content in the surface layers (0-20 cm) decreased by 0.16% of the initial content, nitrate nitrogen decreased by 21% in ordinary chernozem, mobile phosphorus - by 11%, and in the southern chernozem nitrate nitrogen decreased by 20%, mobile phosphorus - by 20%.