On the priority and needs in liming of acid soil in the Vladimir region
This article highlights the analysis of the federal and regional budgets for liming acid soil of the Vladimir region between 2020-2021. The majority of funds were spent on the melioration of grey forest soil (62.6-63.5% of the allocated funds). Compared to soddy podzolic soil, the areas of limed grey forest soil were also 1.48-1.50 times higher. To assess the correspondence between the priority and the need for liming of grey forest soil of Opole in a long-term stationary experiment, the dynamics of the productivity of crop rotations and their physical and chemical properties were studied. This research revealed that in the control area, compared with the soil under liming, a decrease in pHKCl from 5.32-5.60 to 5.07-5.19 and the degree of saturation of solid absorption complex (SAC) with bases from 87.5-89.1 to 85.1%, an increase in hydrolytic acidity (НГ) from 2.80-3.24 to 3.85 mq-eqv/100 g soil did not lead to a drop in crop productivity. It did become smaller from the use of single and double doses of NPK under culture with a decrease in pHKCl to 4.95-5.11, the degree of saturation with bases to 82-83%, an increase in НГ to 4.72-4.98 mq-eqv/100 g soil. In the entire meter layer of soil, the content of exchange aluminum did not exceed 0.3 mg/100 g of soil. Based on the study of the relationship between рНКСl and the physicochemical and chemical properties of grey forest soils in a stationary experiment for the improvement of landscape-specific agriculture, growth in рНКСl with a greater degree of saturation of the SAC with bases and humus content was noted, and its drop with an increase in the capacity of cation exchange. The slight acid reaction of the soil corresponded to the degree of saturation of the SAC with bases of about 85%.