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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

Creator:: Yi, Hoonbok
Abstract:: The process of silvicultural thinning has become very controversial recently with regards to fire protection and management for old-growth conditions and biodiversity. Therefore, an unthinned control stand and 3 different thinning intensities were examined for their effects on the abundance, species richness, and diversity of arthropods in thinning treatments of...
Resource Type:: Dissertation

Creator:: Kellogg, L. D. (Loren D.), Davis, Chad T. (Chad Thomas), and Oregon State University. Forest Research Laboratory
Abstract:: Harvesting productivity rates and costs were determined for three silvicultural treatments used in commercial ground-based thinning of young stands to achieve timber management objectives and enhance wildlife habitat. Treatment definitions were based on residual trees per acre (tpa) after thinning. The treatments were light thin (115 residual tpa), light thin...
Resource Type:: Technical Report
Full Text:: paper. The research was supported by a USDA Forest Service Willamette National Forest Research Grant

Creator:: Kellogg, L. D. (Loren D.), Spong, Ben, and Oregon State University. Forest Research Laboratory
Abstract:: Young Douglas-fir stands were commercially thinned to achieve vegetation- and wildlife-related objectives. Harvesting and forwarding production and costs were compared among three mechanized thinning treatments: light thin [(115 residual trees per acre (tpa)], light thin with 0.5-ac openings (92 residual tpa), and heavy thin (53 residual tpa). The sites were...
Resource Type:: Technical Report
Full Text:: study undertaken by the Cascade Center for Ecosystem Management, Willamette National Forest, Oregon

Creator:: Vincent, Robert M.
Resource Type:: Undergraduate Thesis
Full Text:: Douglas fir on a farm woodlot in the Willamette Valley AN INVESTIGATION OF THE EFFECTS OF PARTIAL

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:: costs: Experience from the Willamette Young Stand project. Forest Research Laboratory, Oregon State

Creator:: Powers, Jennifer Sarah
Abstract:: I developed a conceptual model of Douglas-fir bark beetle dynamics and associated host mortality across spatial and temporal scales. I proposed that a hierarchy of factors influence host resistance to attack at different spatial scales. I then tested this model by measuring the association between the occurrence of beetle-kill and...
Resource Type:: Masters Thesis
Full Text:: partial autocorrelation functions for Douglas-fir beetle activity in the Willamette National Forest

Creator:: Giglia, Sheryl K.
Abstract:: Old-growth in the Pacific Northwest is generally defined as trees that are more than 200 years old. A great deal of analysis and discussion about old-growth forests in western Oregon, however, has focused on the relatively widespread 400 to 500 year age class of primarily Douglas-fir (Pseudotsuga menziesii) trees. The...
Resource Type:: Masters Thesis

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