Effect of the Initial State of Amelioration on the Agrochemical Properties of Fallow Sod-Podzolic Soils

摘要

Based on the data of long-term field experience, the effect of the initial state of cultivation on the development of the current processes in soil formation that lead to a change in their agrochemical parameters has been observed on fallow agro-podzolic clay-loam soils. It was found that the overgrowth of arable sod-podzolic soils of different cultivation status contributes to the differentiation of the postagrogenic arable horizon into two sublayers. The sod process of soil formation goes in the upper 0— 10-cm layer, which leads to an increase in the content of organic matter and the amount of exchange bases; podsolization took place in the lower layer (10—20 cm), causing a decrease in humus content and an increase in acidity. Excessive and highinitial cultivation accelerates the process of differentiation of postagrogenic horizon to sublayers. The level of the arable layer's amelioration status achieved in the previous years was the same even in the third year of wild revegetation.