Tolga Öztürk

Impact assessment of log skidding on soil condition of skid roads during ground-based logging in a plantation forest in Istanbul, Turkey

*Corresponding author: a Istanbul University, Faculty of Forestry, Department of Forest Construction and, Transportation, 34473, Bahcekoy, Istanbul, Turkey, phone: +905327147456, tozturk@istanbul.edu.tr b Istanbul University, Faculty of Forestry, Department of Soil Science and Ecology, Istanbul, Turkey. c Bursa Technical University, Faculty of Forestry, Forest Engineering Department, Bursa, Turkey.

Analysis of pavement construction on a sample forest road section in Sarıyer region.

The m ainteııance of the forest roads includes constructing and reconditioniııg tlıe pavenıents, m aintaiııing the stream Crossing structures along the route, eleaııing and im proving the ditciıes, and straiglıteniııg the Iıoles and barrovvs on the roadvvay. In this study, pavem ent construction activities in a sample forest road section, especially vvith Iıeavy trafilc loads, are examined in various aspects. The research vvas perform ed in the forest of Sarıyer Forest Enterprises, located in the İstanbul D istrict D irectorate of Forestry. The pavem ent of a B type forest road vvith 02 code in Rumeli Feneri vvas examiııed and various field m easurem ents vvere taken suclı as cross section, slope, and soil compaction values. The deform ation of the pavements in first year after construction vvas examined and the suitability of the pavem ent vvas also analyzed. K ey W ords: Pavem ent, forest road, com paction , c a ısh e d m ateria l

Work Performance of MB Trac 900 Tractor on Mountains Terrain in Turkey

The forestry works mainly involves such various stages as growing, protection, production, wood harvesting, marketing and utilization of forest products. Wood harvesting is performed by completion of cutting, extraction and transporting stages. The most obvious feature of wood harvesting is that the operations are done under various weather conditions open in the field. The measurements and observations were made on 25 work made under different working conditions during cable pulling with MB Trac 900 forest tractor at the harvesting area. The time determinations were made with continuous time measuring technique. Regression analyses were employed for determining the factors. In this study, the results of studies carried out on the MB Trac 900 forest tractor operated in the Artvin region located in the Northeast Turkey are presented.