TY JOUR TI ECONOMIC EFFICIENCY OF SPRING WHEAT GRAIN PRODUCTION AT DIFFERENT PRICES OF REALIZATION KW profitability KW grain production KW profit KW cost KW resource saving KW costs KW steam KW wheat. JO Vestnik of Kazan State Agrarian University AU Sineschekov, V.E. AU Vasil'eva, N.V. AU Dudkina, E.A. PY 2018 IS 13 PB Kazan state agrarian University