Abstract
Keywords: agricultural tractor, tire well, contact surface whell-road, soil stress, soil deformation
In the paper it is analyzed the influence of constructive and work parameters of the tire wheels (types, dimensions, inflation pressure, load,) and of working conditions of the machinery (travel speed, number of passing on the same tracks etc.) over the propagation way of the pressure from the contact surface wheel-soil in the depth of soil and over the penetration resistance and of soils apparent density. . In the end it is presented the technical possibilities of modification of inflation pressure during the run, using a central tire inflation system.