Journal of Food, Agriculture and Environment

A techno-economic evaluation of skidding operation by Timber jack 450C and Clark Ranger 666BDS in Caspian forests

Author(s):

Farshad Keivan Behjou

Recieved Date: 2010-07-30, Accepted Date: 2010-11-04

Abstract:

A field production study was conducted for a cut-to-length harvesting system using Timber jack 450C and Clark Ranger 666 BDS in a Caspian hardwood forest site. A selective cut was performed on a 66-hectare tract with an average slope of 30 percent. Skidding time per turn using Timber jack 450C were most affected by skidding distance, winching distance, and interaction between skidding distance, skid trail slope, and using Clark Ranger 666 BDS were most affected by interaction between skidding distance and volume per turn, interaction between skidding distance and skid trail slope, winching slope, respectively. The production rate using Timber jack 450C and Clark Ranger 666 BDS were 22.93 m³ (3.42 m³) and 19.29 m³ (1.61m³) per hour, respectively. The unit cost rate of Timber jack 450C and Clark Ranger 666 BDS were US$0.62 and US$0.74/m³, respectively. The results of statistical analysis using t-test showed that there are significant differences between two machines regarding to the amounts of productivities (t_value=2.36, P_value=0.04). The results of statistical analysis using t-test showed that there are significant differences between two machines regarding to the amounts of costs (t_value=2.48, P_value=0.03). The results have implications for equipment selection and the planning of harvests and harvest access systems.

Keywords:

Timber jack 450C, Clark Ranger 666 BDS, skidding, production rate, unit cost

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Environment
Pages: 1020-1023

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