In tractors, the wheel sliding is caused by several factors, including the tractive effort required to move a certain implement and type of surface that is in contact with the tire treads. This study aimed at evaluating the wheel sliding of a tractor in different corn tillage systems in Bambuí, MG, Brazil. The experiment was conducted in the field in the second crop of autumn 2011 at the Minas Gerais Federal Institute - campus Bambuí (Experimental Station) in an Oxisol Ustox. The experiment was arranged in split-plots, with the operations in the plots, the gears in the splitplots and rotations in the split-splitplots, in a randomized block design with three replications, totaling eighty-one experimental units. The factors and levels studied were: (CT) conventional tillage (MT), minimum tillage (NT) and no tillage. Each treatment used three run speeds (A2, A3 and B1) in three motor rotations (1600, 1900 and 2200 rpm). The results showed that in the conventional tillage, the highest wheel sliding occurs in the sowing operation; in the minimum tillage, the highest wheel sliding occurs in the operation of scarification; and in no tillage system in the sowing operation.
tillage; conventional tillage; minimum tillage; no tillage; corn
