TY CONF TI PHOSPHATE-POTASSIUM REGIME OF LEACHED CHERNOZEM IN THE NORTHERN FOREST-STEPPE ZONE OF THE CHELYABINSK REGION KW leached chernozem KW exchangeable potassium KW labile phosphorus KW soil fertility KW monitoring of agricultural lands JO «PROBLEMS OF SOIL FERTILITY IN MODERN AGRICULTURE» AU Zaharova, I.A. AU Yumashev, H.S. AU Bragina, Z.A. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS