Abstract
Increased mechanization in the forestry means usually increased traffic on a ground which is also used as a growth substrate. In this state‐of‐the‐art article it is found that the traffic could have an areal extent of 10–30% of the site area mainly due to yarding at clear‐felling and thinning. In the future there could be up to 6 machine entries on the site till a stand age of 50 year. Skidding is often recognized as the major cause of soil disturbance with 50–75% of the skid trails considered as apparently compacted. Rut formation after forwarders can also be a problem but harvesters seems to be forgotten or give minor problems. In order to reduce soil compaction smaller machines must be considered on many sites. Maybe 5–10 tonnes machines with a real mean ground pressure of 60–70 kPa could give, thanks to good tyres, an acceptable level of soil disturbance. High tractive forces and slip may contribute to the soil disturbance as much as double the ground pressure. Calculations show it is therefore better...
Published Version
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