00561naa#a2200181#i#450# EN\\bibl\132071 20260811110828.2 2222-0364 20240325b2024####ek#y0engy0150####ca RU DYNAMICS OF SOIL FERTILITY IN AGRICULTURAL LANDS OF THE FOREST-STEPPE OF THE SOUTH OF WESTERN SIBERIA Journal article Omsk FSBEI HE Omsk SAU 2024 7 с. Journal article local Плодородие. 631.452 SCHMIDT A G BOBRENKO E G vestnik.omgau.ru