Download or read book Commercial Thinning in Small diameter Spruce fir Stands Production and Cost of Skidding and Skyline Yarding with and Without Prebunching written by Robert S. Seymour and published by . This book was released on 1985 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report INT written by and published by . This book was released on 1987 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Concepts and Interpreted Examples in Advanced Fuel Modeling written by Robert E. Burgan and published by . This book was released on 1987 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beaver in Western North America written by Charles W. George and published by . This book was released on 1988 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Future Forests of the Mountain West written by and published by . This book was released on 1988 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comparison of Small Single and Double drum Cable Systems for Prebunching Partial Cuts written by Frederick M. Hathaway and published by . This book was released on 1986 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report of the Cooperative Forestry Research Unit written by University of Maine at Orono. Cooperative Forestry Research Unit and published by . This book was released on 1980 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Miscellaneous Report written by and published by . This book was released on 1982 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Social Sciences in Forestry written by and published by . This book was released on 1986 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Northeastern Logger written by and published by . This book was released on 1990 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiment Station Bulletin written by and published by . This book was released on 1986 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book N Y Forest Owner written by and published by . This book was released on 1985 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Case Study of Prebunching and Swinging written by Loren D. Kellogg and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercial thinning young growth forests is an increasingly important silvicultural technique for improving second growth management of Douglas-fir stands. Research aimed at advancing the efficiency of skyline logging operations in small wood timber stands is essential in order to make thinning these young stands economical. The purpose of this study was to evaluate one case of prebunching small logs to a skyline corridor with a portable winch and swinging the logs to a haul road with a conventional mobile yarder. Prebunching involves lateral yarding of logs from both sides of a skyline corridor and decking the logs along the corridor. The multiinoinent time study method was used for obtaining data that was analyzed with multiple linear regression procedures. Predicted hourly and daily production rates were determined from the regression equations. The yarding system involving prebunching was compared to a similar system without prebunching on a cost basis. This study showed that prebunching logs to a skyline corridor reduced the conventional mobile yarder's yarding time 65 percent and more than doubled log and volume production per day. The results favored the prebunching and swinging yarding technique. Several suggestions, that require additional research, were made for modification in the system that may improve the overall operation.

Download or read book Skyline Thinning Production and Costs written by Loren D. Kellogg and published by . This book was released on 1999 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Annual Report written by University of Maine at Orono. Forest Resources Research Advisory Committee and published by . This book was released on 1982 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin Maine Agricultural Experiment Station written by Maine Agricultural Experiment Station and published by . This book was released on with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1987 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt: