TY JOUR TI DEVELOPMENT OF A DROUGHT-RESISTANT CULTIVAR OF SPRING BARLEY FOR THE STEPPE ZONE OF THE MIDDLE VOLGA REGION KW barley KW breeding KW variety KW yield KW xerophytism JO Bulletin Samara State Agricultural Academy AU Dolzhenko, D.O. AU Kaliakulina, I.A. AU Bisharev, A.A. AU Dvortcova, T.V. PY 2020 IS 5 PB Samara State Agrarian University