Studies of the actual, metabolic and hydrolytic acidity of soils in agricultural lands of the southern part of Shakhtersk district of the Donetsk People’s Republic were carried out. It has been shown that in terms of actual acidity, agricultural soils differ depending on the extent to which the land has been withdrawn from use, the type of crop being cultivated, and the link in the crop rotation system. Farmland soils are characterized by higher acidity values compared to the control plot, with pH values ranging from 5.37 to 6.88. The greatest changes in metabolic and hydrolytic acidity towards an increase in its indicators affected the arable and subarable horizons of areas that were fallow after growing a number of agricultural crops.

D.V. Syshchykov, I.V. Agurova