TY JOUR TI INFLUENCE OF SPRING WHEAT CULTIVATION TECHNOLOGY ON SOIL AGRO-PHYSICAL PROPERTIES AND YIELD KW wheat KW technology KW soil KW productivity KW nitrates KW spring JO Bulletin Samara State Agricultural Academy AU Bakaeva, N.P. AU Gnilomedov, Y.A. PY 2019 IS 4 PB Samara State Agrarian University