TY JOUR TI EFFECTIVENESS OF MINERAL FERTILIZER ACCORDING TO SOIL MOISTURE FOR PLANTING OF SPRING DURUM WHEAT IN THE CONDITIONS FOREST-STEPPE OF MIDDLE VOLGA REGION KW spring durum wheat KW fertilizers KW soil moisture KW irrigation KW productivity. JO Vestnik of Kazan State Agrarian University AU Amirov, M.F. PY 2016 IS 11 PB Kazan state agrarian University