TY JOUR TI THE EFFECT OF THE COMBINED USE OF BIOAGENTS AND PLANT ADAPTOGEN ON THE PRODUCTIVITY AND OIL CONTENT OF SPRING RAPESEED ON LEACHED CHERNOZEM AND GRAY FOREST SOIL KW spring rapeseed (Brassica napus L.) KW bioagents KW plant adaptogen KW productivity KW oil content KW leached black soil KW gray forest soil KW RECB-50 B JO Agrobiotechnologies and digital farming AU Suleymanov, S.R. AU Nizamov, R.M. PY 2025 IS 4 PB Kazan state agrarian University