The Effect of Ground Skidding on Soil Physical Features

The present investigation was done in forest region number one in the south eastern part of Sari city. According to this, the effect of utilization and wood transportation, which has been done for many years, on element, site and forest, herbal layer and soil features ( in two different depth from 0 to 10 cms and from 10 to 20 cms ) was measured in skidding ways of a forest region. As a result, the skidding ways and also the region which has not been touched was considered for sampling on seven different places every 10 meters. There fore, seven samples of any herbal layer, seven samples of soil up to the depth of 10cm and seven samples less than 20cms was provided. Each sample of herbal layer was in 1 m. Soil compression on the same points which the elements of forest and herbal layer was taken, on the same two mentioned depth was done. At the end, it is concluded that soil compression which is created by ground skidding increases the micro lithic soil and soil density decreases perforations and amount of humidity. The bad effects of soil compression was mentioned by a lot of researchers before.