The problem of ecological compatibility of self-propelled vehicles and soils is intricate and requires integrated systematic analysis of multiple tasks. This work is aimed at studying theoretical researches of soil packing caused by timber harvester running gear. To preserve and ensure faster restoration of forest soil fertility it is necessary to define at the cutting area development stage the tolerable limit of the timber harvesting equipment's impact at which soil disturbance does not become irreversible and the process of restoration of its properties is the shortest.
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