ABSTRACT
INTRODUCTION
STUDY METHODS
1. Study site description
2. Equipment and logging operation used in study
3. Methods
RESULTS AND DISCUSSION
1. An analysis of yarding time element
2. The efficiency analysis of yarding operation
3. The simulation analysis of yarding operation time
4. An analysis of yarding operation system
5. The analysis of optimum lateral yarding distance and optimum setting-up spacing
CONCLUSIONS
LITERATURE CITED