TY JOUR TI THE USE OF UNIVERSAL TILLING TRACTORS OF THE SERIES "BELARUS 1221" IN ZONAL TECHNOLOGIES OF SOIL PROCESSING KW adaptation KW ballasting KW range KW spe-cific weight KW efficiency JO Bulletin of KSAU AU Selivanov, N.I. AU Romanov, V.S. AU Zaprydsky, V.N. PY 2017 IS PB Krasnoyarsk State Agrarian University