CHANGES IN AGROCHEMICAL PARAMETERS OF SOD-PODZOLIC SOILS WITH VARYING DEGREES OF AVAILABILITY OF MOBILE FORMS OF PHOSPHORUS

the article presents the results of a study of the agrochemical properties of sod-podzolic soils in the fields of LLC “Plemsovkhoz “Lindovsky” in the area of one of the poultry factories of the Nizhny Novgorod region. It was noted that with a very high phosphorus content in soils, the humus content increased to 2,5%, mobile phosphorus – up to 676 mg/kg and potassium – up to 398 mg/kg. In the surveyed areas, grouped by the availability of mobile forms of phosphorus in the soils, positive dynamics of an increase in humus content (31,3–56,3%), an increase in pHКСl and hydrolytic acidity by 4,3–6,4% and 8,2–9,1%, respectively, were found. The share of exchangeable calcium and magnesium cations in the soils of the farm is 71,2–73,0% of the total absorption capacity, while there is no trend of change in this indicator in soils grouped taking into account their phosphorus supply.