TY JOUR TI DENSITY COMPOSITION OF TOPSOIL, DEPENDING ON VARIETY AND METHODS OF BASIC SOIL CULTIVATION KW spring barley KW variety KW soil density KW soil cultivation KW plowing KW disking KW milling. JO Vestnik of Kazan State Agrarian University AU Shashkarov, L.. AU Ovchinnikov, A.. PY 2016 IS 11 PB Kazan state agrarian University