TY JOUR TI XEROPHYTISM STUDY OF WINTER WHEAT VARIETIES CONTAINED IN COLLECTIONS IN ALL-RUSSIAN INSTITUTE OF PLANT BREEDINGIN THE MIDDLE VOLGA REGION KW wheat KW xerophytism KW yield KW plasticity KW adaptability JO Bulletin Samara State Agricultural Academy AU Sukhorukov, A.F. AU Sukhorukov, A.A. PY 2020 IS 5 PB Samara State Agrarian University