TY JOUR TI NUTRITION BACKGROUND EFFECT ON PRODUCTIVITY OF OATS KW biologization of farming KW mineral nutrition KW soil bulk density KW prevalence KW straw KW green manure KW crop productivity. JO Vestnik of Kazan State Agrarian University AU Akhmetzyanov, M.R. AU Talanov, I.P. PY 2014 IS 9 PB Kazan state agrarian University