مقايسه توليد اسكيدر چرخ لاستيكي Timberjack 450c در دو حالت بهره برداري طراحي شده و طراحي نشده مطالعه موردي: سري 2 ناو اسالم

Efficiency comparison of Timber Jack 450C skidder in planned and unplanned logging system (Case study: second district of Nave-Asalem

In this study, wood extract production and costs were assessed in the planned and unplanned (conventional) Jogging system. The research was carried out in compartments No. 23 and 25 of second district of Nave-Asalern forest. Work study technique based on JUFRO guideline was used to calculate system hourly production. Based on guideline of Forest, Range and Watershed Organization (FRWO) of Iran, system hourly cost was calculated. Results showed that planning skid trails and landings before tree felling as well as using directional felling technique increased hourly skidder production from 12.72m3 to 18.8m3 . Increase of production, reduced the extraction cost from 103015 to 69372 Rials pcr cubic meter. The se extraction costs include landing construetion costs in planned harvesting and road maintenance costs in unplanned logging system