Bodnar Y. Transformation of agrophysical and agrochemical properties of gray forest soil for long-term application of fertilizers in field crop rotation.

The object of research is the processes of cultural formation of gray forest soil under the influence of abiotic and biotic factors. The purpose of the work is to determine the regularities of the transformation of the potential and effective soil fertility under the influence of abiotic and anthropogenic factors during 50 years of the using of field crop rotation on the gray forest coarse silty sandy soil. For the first time on the basis of system monitoring during the 50-year period of 10-field field crop rotation, the orientation of the course of soil-forming processes in gray forest soil on the traditional and alternative (renewable) fertilizer system with the maximum attraction of renewable organic resources is established. The direct dependence of soil formation processes on the amount of absorbed bases, which regulates the reaction of soil solution, has been proved, determines the humus and nitrogen pool in the arable and under arable layers of the soil. Scientific developments were introduced during 2013-2017 on agricultural farms of the Kyiv region on the total area of 290 hectares. The field of use is agricultural production.