TY JOUR TI Performance properties of tractors with automatic and mechanical gearbox – comparative analysis KW technology KW energy vehicle KW gear shifting KW range KW traction KW agricultural engineering KW agricultural tractors KW tillage KW productivity KW regulation KW efficiency JO INTERNATIONAL AGRICULTURAL JOURNAL AU Iovlev, G.A. AU Pobedinsky, V.V. AU Goldina, I.I. AU Zorkov, V.S. AU Nesgovorov, A.G. PY 2024 IS 0 PB Electronic science