TY JOUR TI PRODUCTIVITY OF SPRING BARLEY DEPENDING ON THE TYPE OF FERTILIZERS USED AND BIOLOGICS BISOLBIFIT KW spring barley (Hordeum vulgare L.) KW mineral KW biomineral fertilizers KW yield KW protein KW biological product JO Vestnik of Kazan State Agrarian University AU Zayceva, K.G. PY 2021 IS 15 PB Kazan state agrarian University