TY JOUR TI A CONTRIBUTION OF PROFESSOR A.A. ZIGANSHIN TO THE DEVELOPMENT OF WINTER RYE CULTIVATION TECHNOLOGY KW winter rye KW cultivation technology KW predecessor KW fertilizer KW crop programming. JO Vestnik of Kazan State Agrarian University AU Ismagilov, R.R. AU Nurlygayanov, R.B. PY 2018 IS 12 PB Kazan state agrarian University