Index Catalog // ScholarsArchive@OSU

Young stand thinning in Western Oregon : cost comparison of harvesting alternatives and comparison of time study techniques

Creator:: Hossain, Mohammad Mozaffar
Abstract:: Harvesting costs were determined for commercial thinning of young stands to achieve vegetation and wildlife objectives. This included replicated comparisons of thinning treatments. Treatments were defined based on residual tree stocking after thinning. Study procedures were developed and evaluated to improve statistical relevance. Multiple linear regression models were used to...
Resource Type:: Dissertation

Logging planning and layout costs for thinning : experience from the Willamette Young Stand Project

Creator:: Kellogg, L. D. (Loren D.), Milota, Ginger, Stringham, Bennett, and Oregon State University. Forest Research Laboratory
Abstract:: Logging planning and layout costs were examined for commercial thinning of 40- to 50-yr-old stands of Douglas-fir on the Willamette National Forest in the Cascade Mountains of Oregon. The study consisted of four replications of three silvicultural treatments. Thinning involved three types of logging systems: mechanized cut-to-length (a combination of...
Resource Type:: Technical Report
Full Text:: stands of Douglas-fir on the Willamette National Forest in the Cascade Mountains of Oregon. The study

Thinning aged Douglas-fir : an analysis of mobilization costs and a log bucking strategy for revenue improvement

Creator:: Pilkerton, Stephen J.
Abstract:: Contract harvest operations have become the preferred approach to reducing the largest cost component of timber production through free market competition amongst logging contractors bidding or negotiating for work. The goal of this research was to investigate economic components of harvesting operations not previously studied for steep slope thinning harvests...
Resource Type:: Dissertation
Full Text:: : Thinning Aged Douglas-Fir: An Analysis Of Mobilization Costs And A Log Bucking Strategy For Revenue

Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades

Creator:: Velazquez-Martinez, Alejandro
Abstract:: The objectives of this research were to study: a) the effect of thinning and treatments consisting of pruning and multinutrient fertilization on aboveground biolnass increment, growth efficiency (GE), and foliar nutrients; b) the influence of topoedaphic variables (soil nutrients, slope, aspect, and rock content) and foliar nutrients on both leaf...
Resource Type:: Dissertation

Effects of stand density reduction on structural development in western Oregon Douglas-fir forests : a reconstruction study

Creator:: Bailey, John Duff, 1961-
Abstract:: This research examined thinning effects on stand structure and species composition in 50- to 120-year-old Douglas-fir forests. Thirty-two paired stands (thinned and unthinned) were measured throughout western Oregon, as were 20 old-growth stands for comparison. Thinnings occurred 10 to 24 years previously and ranged in intensity from 8 to 60%...
Resource Type:: Dissertation

Response of young Douglas-fir to 16 years of intensive thinning

Creator:: Tappeiner, J. C. (John C.), Bell, John F., Brodie, J. Douglas (John Douglas), 1938-, and Oregon State University. Forest Research Laboratory
Abstract:: A 20-year-old Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] stand in the Oregon Coast Range was thinned from about 1,700 to about 350 trees/ac. Subsequent thinnings, under eight different regimes, occurred at ages 23, 27, 30, and 32. Average net periodic cubic-volume growth was strongly influenced by thinning regime, varying from about...
Resource Type:: Technical Report
Full Text:: calibration thinning and the first treatment thinning in a 20-year-old Douglas-fir stand at Hoskins, Oregon

The effects of thinning on stand and tree growth in a young, high site Douglas-fir stand in western Oregon

Creator:: Marshall, David D.
Abstract:: The Levels-of-Growing-Stock Studies in Douglas-fir is a regional cooperative to investigate the effects of levels of growing stock on young stand growth. The Hoskins installation, in western Oregon, was established in a dense, high site natural stand at total age 20 years. The initial thinning resulted in an immediate 131...
Resource Type:: Dissertation

Thinning Douglas fir on the McDonald Forest

Creator:: Willison, Herbert
Resource Type:: Undergraduate Thesis
Full Text:: Thinning Douglas fir on the McDonald Forest sE1iop

Vegetation response following thinning in young Douglas-fir forests of western Oregon : can thinning accelerate development of late-successional structure and composition?

Creator:: Beggs, Liane R.
Abstract:: Across western Oregon, Washington, and British Columbia, forest management practices over the past century reduced the amount of late-successional forest while simultaneously increasing the amount of young (less than 80 years old), managed Douglas-fir (Pseudotsuga menziesii) dominated forests. Recently, concerns over loss of late-successional habitat pushed management objectives on public...
Resource Type:: Masters Thesis
Full Text:: Following Thinning in Young Douglas-fir Forests of Western Oregon: Can Thinning Accelerate Development of

Two thinnings of douglas-fir with crawler tractors : time differences

Creator:: Kangur, Rudolf and Oregon State University. Forest Research Laboratory
Abstract:: Two intermediate cuttings were made in a Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand on the Wilark forest management research area in northwestern Oregon. Age of trees in the stand varied from 47 to 62 years at the first cutting. Crawler tractors were used in both extractions. In the first cutting,...
Resource Type:: Technical Report
Full Text:: courage in following through with the first thinning; To Shaw Brothers Logging Company, Vernonia, Oregon

ScholarsArchive@OSU

Young stand thinning in Western Oregon : cost comparison of harvesting alternatives and comparison of time study techniques

Logging planning and layout costs for thinning : experience from the Willamette Young Stand Project

Thinning aged Douglas-fir : an analysis of mobilization costs and a log bucking strategy for revenue improvement

Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades

Effects of stand density reduction on structural development in western Oregon Douglas-fir forests : a reconstruction study

Response of young Douglas-fir to 16 years of intensive thinning

The effects of thinning on stand and tree growth in a young, high site Douglas-fir stand in western Oregon

Thinning Douglas fir on the McDonald Forest

Vegetation response following thinning in young Douglas-fir forests of western Oregon : can thinning accelerate development of late-successional structure and composition?

Two thinnings of douglas-fir with crawler tractors : time differences

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