TY JOUR TI DESIGN AND RESULTS OF EXPERIMENTAL-INDUSTRIAL TESTS OF THE IMPROVED PLOW OF 14kN CLASS TRACTOR KW plow KW compaction KW “cylindrical hoof” KW section of the formation KW section of the formation KW ridging JO Vestnik of Kazan State Agrarian University AU Smirnov, P.A. AU Smirnov, M.P. AU Medvedev, V.I. PY 2019 IS 14 PB Kazan state agrarian University