An optimization model to solve skidding problem in steep slope terrain

Sattar Ezzati, Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University (TMU), Iran, Akbar Najafi, Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University (TMU), Iran AND Department of Forest Harvesting Logistic and Amelioration, Faculty of Forestry, Technical University in Zvolen, Slovakia, a.najafi@modares.ac.ir , Masoud Yaghini, Department of Forest Harvesting Logistic and Amelioration, Faculty of Forestry, Technical University in Zvolen, Slovakia, Amir Ala Hashemi, Department of Forest Harvesting Logistic and Amelioration, Faculty of Forestry, Technical University in Zvolen, Slovakia, Pete Bettinger, Warnell School of Forestry and Natural Resources, University of Georgia, USA