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• 1. [Article] Economic impact of proposed Oregon Forest Practices Rules on industrial forest lands in the Oregon Coast Range : a case study

  Citation × Citation Citation Abstract Copy Title: Economic impact of proposed Oregon Forest Practices Rules on industrial forest lands in the Oregon Coast Range : a case study Author: Oregon State University. Forest Research Laboratory, Keough, David S., LaCourse, Diane K., Olsen, Eldon D. Title: Economic impact of proposed Oregon Forest Practices Rules on industrial forest lands in the Oregon Coast Range : a case study Author: Oregon State University. Forest Research Laboratory, Keough, David S., LaCourse, Diane K., Olsen, Eldon D. Close

• 2. [Article] Skyline thinning a western hemlock-Sitka spruce stand : harvesting costs and stand damage

  Citation × Citation Citation Abstract Copy Title: Skyline thinning a western hemlock-Sitka spruce stand : harvesting costs and stand damage Author: Oregon State University. Forest Research Laboratory, Hargrave, Michael A., Olsen, Eldon D., Kellogg, L. D. (Loren D.) Title: Skyline thinning a western hemlock-Sitka spruce stand : harvesting costs and stand damage Author: Oregon State University. Forest Research Laboratory, Hargrave, Michael A., Olsen, Eldon D., Kellogg, L. D. (Loren D.) Close

• 3. [Article] Skyline thinning production and costs : experience from the Willamette Young Stand Project

  Production rates and costs for skyline harvesting were examined over a range of residual thinning intensities, operational methods, and sites. The sites included three stands of 40- to 50-yr-old Douglas-fir ...

  Citation × Citation Citation Abstract Copy Title: Skyline thinning production and costs : experience from the Willamette Young Stand Project Author: Oregon State University. Forest Research Laboratory, Miller, Mark E., Olsen, Eldon D., Kellogg, L. D. (Loren D.) Production rates and costs for skyline harvesting were examined over a range of residual thinning intensities, operational methods, and sites. The sites included three stands of 40- to 50-yr-old Douglas-fir on the Willamette National Forest in the Cascade Mountains of Oregon. Three silvicultural treatments were studied at two sites, and one silvicultural treatment at the third site. Detailed time studies were conducted on manual felling and uphill skyline yarding with small or mid-size yarders. Separate regression equations were developed to predict delay-free felling cycle time and delay-free yarding cycle time at each site. The three silvicultural treatments had no consistent influence on production rates and costs, because the initial stocking levels varied among treatments and the volume harvested did not necessarily correspond to the silvicultural treatment. Cost differences within sites, where operational methods were uniform, were small. Cost differences among sites for each activity, such as felling or yarding, were larger because of differences in operational methods. Total harvesting costs among the three sites were similar, ranging from $58 to $64/100 ft³. Title: Skyline thinning production and costs : experience from the Willamette Young Stand Project Author: Oregon State University. Forest Research Laboratory, Miller, Mark E., Olsen, Eldon D., Kellogg, L. D. (Loren D.) Production rates and costs for skyline harvesting were examined over a range of residual thinning intensities, operational methods, and sites. The sites included three stands of 40- to 50-yr-old Douglas-fir on the Willamette National Forest in the Cascade Mountains of Oregon. Three silvicultural treatments were studied at two sites, and one silvicultural treatment at the third site. Detailed time studies were conducted on manual felling and uphill skyline yarding with small or mid-size yarders. Separate regression equations were developed to predict delay-free felling cycle time and delay-free yarding cycle time at each site. The three silvicultural treatments had no consistent influence on production rates and costs, because the initial stocking levels varied among treatments and the volume harvested did not necessarily correspond to the silvicultural treatment. Cost differences within sites, where operational methods were uniform, were small. Cost differences among sites for each activity, such as felling or yarding, were larger because of differences in operational methods. Total harvesting costs among the three sites were similar, ranging from $58 to $64/100 ft³. Close

• 4. [Article] Statistical comparison of methods used in harvesting work studies

  Work-study guidelines were developed using field data from thinning sites in the Oregon Cascade Range. Regression of detailed time study and shift-level data predicted harvesting production rates. Statistical ...

  Citation × Citation Citation Abstract Copy Title: Statistical comparison of methods used in harvesting work studies Author: Oregon State University. Forest Research Laboratory, Miller, Mark E., Hossain, Mohammad M., Olsen, Eldon D. Work-study guidelines were developed using field data from thinning sites in the Oregon Cascade Range. Regression of detailed time study and shift-level data predicted harvesting production rates. Statistical analysis showed the relative difference in the discriminating power between shift-level studies versus detailed time studies. Indicator variables tested if there were significant differences between harvesting treatments. Confidence intervals demonstrated the improved effect of longer study lengths for both shift-level and detailed time studies. Title: Statistical comparison of methods used in harvesting work studies Author: Oregon State University. Forest Research Laboratory, Miller, Mark E., Hossain, Mohammad M., Olsen, Eldon D. Work-study guidelines were developed using field data from thinning sites in the Oregon Cascade Range. Regression of detailed time study and shift-level data predicted harvesting production rates. Statistical analysis showed the relative difference in the discriminating power between shift-level studies versus detailed time studies. Indicator variables tested if there were significant differences between harvesting treatments. Confidence intervals demonstrated the improved effect of longer study lengths for both shift-level and detailed time studies. Close

• 5. [Article] Increasing the productivity of a small yarder : crew size, skidder swinging, hot thinning

  The production rates and costs of harvesting smallwood were determined for a small yarder (Koller K-300) operating under variable conditions: the size of the crew, the addition of a skidder to swing logs ...

  Citation × Citation Citation Abstract Copy Title: Increasing the productivity of a small yarder : crew size, skidder swinging, hot thinning Author: Olsen, Eldon D., Kellogg, L. D. (Loren D.), Oregon State University. Forest Research Laboratory The production rates and costs of harvesting smallwood were determined for a small yarder (Koller K-300) operating under variable conditions: the size of the crew, the addition of a skidder to swing logs from the landing, and the type of harvest method-employed, either conventional or hot thinning (simultaneous felling and yarding of whole trees). Regression equations are presented for the felling, yarding, swinging, and loading cycles of each harvest method. Title: Increasing the productivity of a small yarder : crew size, skidder swinging, hot thinning Author: Olsen, Eldon D., Kellogg, L. D. (Loren D.), Oregon State University. Forest Research Laboratory The production rates and costs of harvesting smallwood were determined for a small yarder (Koller K-300) operating under variable conditions: the size of the crew, the addition of a skidder to swing logs from the landing, and the type of harvest method-employed, either conventional or hot thinning (simultaneous felling and yarding of whole trees). Regression equations are presented for the felling, yarding, swinging, and loading cycles of each harvest method. Close

• 6. [Article] Determining costs of logging-crew labor and equipment

  Citation × Citation Citation Abstract Copy Title: Determining costs of logging-crew labor and equipment Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Bushman, Stephen P. Title: Determining costs of logging-crew labor and equipment Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Bushman, Stephen P. Close

• 7. [Article] Questions about optimal bucking

  A compilation of Oregon State University research work on computer-aided crosscutting (bucking) of trees into logs. Major considerations for deciding whether to adopt optimal bucking and steps to implement ...

  Citation × Citation Citation Abstract Copy Title: Questions about optimal bucking Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D. A compilation of Oregon State University research work on computer-aided crosscutting (bucking) of trees into logs. Major considerations for deciding whether to adopt optimal bucking and steps to implement it are described. The bulletin references field studies which evaluated and tested prototype optimal bucking systems. Title: Questions about optimal bucking Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D. A compilation of Oregon State University research work on computer-aided crosscutting (bucking) of trees into logs. Major considerations for deciding whether to adopt optimal bucking and steps to implement it are described. The bulletin references field studies which evaluated and tested prototype optimal bucking systems. Close

• 8. [Article] Predicting skidder productivity : a mobility model

  Citation × Citation Citation Abstract Copy Title: Predicting skidder productivity : a mobility model Author: Oregon State University. Forest Research Laboratory, Gibbons, Daniel J., Olsen, Eldon D. Title: Predicting skidder productivity : a mobility model Author: Oregon State University. Forest Research Laboratory, Gibbons, Daniel J., Olsen, Eldon D. Close

• 9. [Article] Balloon logging with the pendulum-swing system -- factors affecting lift

  Citation × Citation Citation Abstract Copy Title: Balloon logging with the pendulum-swing system -- factors affecting lift Author: Pyles, Marvin Russell, Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Tuor, Brian R. Title: Balloon logging with the pendulum-swing system -- factors affecting lift Author: Pyles, Marvin Russell, Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Tuor, Brian R. Close

• 10. [Article] Key issues and future directions of mechanized harvesting : discussions and guidance from working groups

  Recognition of the problems and opportunities in mechanized harvesting should help in development of solutions and maximum realization of its potential. This paper presents feedback from five working groups, ...

  Citation × Citation Citation Abstract Copy Title: Key issues and future directions of mechanized harvesting : discussions and guidance from working groups Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Bettinger, Pete, 1962-, Kellogg, L. D. (Loren D.) Recognition of the problems and opportunities in mechanized harvesting should help in development of solutions and maximum realization of its potential. This paper presents feedback from five working groups, the members of which were involved in mechanized harvesting issues with various organizations in the Pacific Northwest. The groups identified needs and assigned priorities for research in all areas of mechanized harvesting. Most participants thought the working groups were effective. Suggestions for future workshops included encouraging a broader mix of participants, scheduling a longer session for working groups, and providing more guidance to summarizers. Plans for future studies and stronger interactions with other interests in the forest industry may develop from suggestions of the working groups. Title: Key issues and future directions of mechanized harvesting : discussions and guidance from working groups Author: Oregon State University. Forest Research Laboratory, Olsen, Eldon D., Bettinger, Pete, 1962-, Kellogg, L. D. (Loren D.) Recognition of the problems and opportunities in mechanized harvesting should help in development of solutions and maximum realization of its potential. This paper presents feedback from five working groups, the members of which were involved in mechanized harvesting issues with various organizations in the Pacific Northwest. The groups identified needs and assigned priorities for research in all areas of mechanized harvesting. Most participants thought the working groups were effective. Suggestions for future workshops included encouraging a broader mix of participants, scheduling a longer session for working groups, and providing more guidance to summarizers. Plans for future studies and stronger interactions with other interests in the forest industry may develop from suggestions of the working groups. Close