A Study on the Productivity and Cost Analysis of the Timber and Logging Residue in CTL System of Excavator Yarding for Using the Woody Resources

The interest in renewable energy is increasing because of higher growth in global energy consumption and limited fossil fuel reserve. In Republic of Korea, the necessity of lignocellulosic biomass is increasing and research on utilization of logging residue is growing. , due to low economic efficiency, domestic logging residue is not being utilized, and many studies are being conducted to solve this issue. The final harvesting cost of timber and logging residue in the -to-length (CTL) system using the excavator investigated through field survey. roductivity and machine costs were calculated time and motion study methods and German forestry operation and machine board (Kuratorium für Waldarbeit und Forsttech nik e.V, KWF) analysis methods. The harvesting costs of timber and logging residue were calculated 43,968 KRW/ton, and 71,079 KRW/ton, respectively. This study helps to validate data on the economics of timber and logging residue in the existing CTL system using an excavator, and presents the feasibility of the supply and utilization of hole-tree system using high-performance forestry machines.