Journal of Forest and Environmental Science

Institute of Forest Science, kangwon National University (강원대학교 산림과학연구소)
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Harvesting Productivity and Cost of Whole-Tree Clear Cutting Using a Tower Yarder in a Larix leptolepis Stand

낙엽송 개벌 임분에서 타워야더를 이용한 전목수확시스템의 작업비용 분석

  • Cho, Min-Jae (Department of Forest Management, Kangwon National University) ;
  • Cho, Koo-Hyun (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Oh, Jae-Heun (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Han, Han-Sup (Department of Forestry and Wildland Resources, Humboldt State University) ;
  • Cha, Du-Song (Department of Forest Management, Kangwon National University)
  • 조민재 (강원대학교 산림환경과학대학) ;
  • 조구현 (국립산림과학원 생산기술연구소) ;
  • 오재헌 (국립산림과학원 생산기술연구소) ;
  • 한한섭 (험볼트 주립대학교) ;
  • 차두송 (강원대학교 산림환경과학대학)
  • Received : 2014.02.04
  • Accepted : 2014.02.09
  • Published : 2014.02.28
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Abstract

The productivity and cost of clear cutting operations were examined to broaden our knowledge on the harvesting system in a Larix leptolepis stand of Korea. The harvesting system was divided into tree operations which were chainsaw (STIHL MS440) felling, tower yarder (Koller301-4) yarding and harvester (WOODY H50) processing. The average cycle time of felling, yarding and processing were 98 s/cycle, 245 s/cycle and 150 s/cycle. The total stump-to-pile operational productivity was 43.07 $m^3/hr$. The highest production activity was the felling 17.93 $m^3/hr$, followed by the productivity of processing 15.62 $m^3/hr$ and then by the productivity of yarding 9.52 $m^3/hr$. In addition the total stump-to-pile operational cost was 24,086 $won/m^3$. The highest cost activity was the yarding 14,557 $won/m^3$ (60.4% of the total cost), followed by the costs of processing 8,461 $won/m^3$ (35.2%) and then by the costs of felling 1,068 $won/m^3$.

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References

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