TY JOUR TI EFFECT OF MINERAL AND SULFUR-BENTONITE FERTILIZERS ON ROSS 140 SV CORN YIELD ON GRAY FOREST SOILS UNDER IRRIGATION AND DRYLAND FARMING KW corn (Zea mays) KW sulfur bentonite KW mineral fertilizers KW yield KW gray forest soils KW irrigation KW Tatarstan KW productivity JO Agrobiotechnologies and digital farming AU Yakhin, I.F. AU Safiollin, F.N. AU Khismatullin, M.M. AU Suleymanov, S.R. AU Trofimov, N.. PY 2025 IS 4 PB Kazan state agrarian University