بررسي اثر قطع گروهي بر خواص فيزيكي خاك جنگلي

The Effect of Group Selection as a Cutting Method on Soil Physical Factors

Soil physical properties are affected by different harvesting treatments. In this study the effect of group selection as a method on soil physical properties has been evaluated.Two similar areas were selected, one as a treated area, and the other as control. Soil mechanical resistance ,infiltration rate ,soil moisture content ,bulk density and porosity were determined prior to, and after cutting .The results indicated that,there were no significant differences between cut and control areas prior to cutting operation. But after cutting, soil mechanical resistance, in cut area, increased for about 17% as compared with control. Bulk density in the 0-5 cm depth increased in cut area while porosity in this depth was decreased for about 12%. Soil moisture content in 0-5cm depth was higher as compared with that in the lower depths. Infiltration rate had decreased for as much as 47%in cut area.