TY JOUR TI ON THE PROBLEM OF NUTRIENT DEFICIENCY IN ARABLE SOILS OF KRASNOYARSK REGION KW soil nutrients KW soil KW agrochemical soil survey KW soil microelement supply KW nitrate nitrogen KW mobile phosphorus KW mobile sulfur KW soil microelements JO Bulletin of KSAU AU Sorokina, O.A. PY 2025 IS 0 PB Krasnoyarsk State Agrarian University