TY JOUR TI TRENDS OF GRAIN PRODUCTION DEVELOPMENT IN THE CONDITIONS OF IMPORT SUBSTITUTION KW agriculture KW grain production KW market KW food KW technology KW efficiency JO Vestnik of Kazan State Agrarian University AU Mukhametgaliev, F.N. AU Sitdikova, L.. AU Avhadiev, F.N. AU Asadullin , N.. AU Gaynutdinov, I.G. PY 2020 IS 15 PB Kazan state agrarian University