TY JOUR TI INFLUENCE OF BIOLOGIZATION FACTORS ON THE YIELD OF WINTER RYE IN THE CONDITIONS OF THE KAMA OF THE REPUBLIC OF TATARSTAN KW crop rotations KW biofactors KW pairs KW soil cultivation KW fertilizers KW straw KW siderates. JO Vestnik of Kazan State Agrarian University AU Akhmetzyanov, M.R. PY 2017 IS 12 PB Kazan state agrarian University