%0 Journal Article %T DYNAMICS OF SOIL FERTILITY IN AGRICULTURAL LANDS OF THE FOREST-STEPPE OF THE SOUTH OF WESTERN SIBERIA %A SCHMIDT, A.G. %A BOBRENKO, E.G. %K soil, humus, nitrogen, phosphorus, potassium, survey, fertility %J Vestnik of Omsk SAU %D 2024 %N 53 %P 7 %I FSBEI HE Omsk SAU