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Creator:: Kellogg, L. D. (Loren D.) and Oregon State University. Forest Research Laboratory
Abstract:: The Forest Engineering Department, Oregon State University, has evaluated several systems for thinning young timber stands on steep terrain. Stands averaged 35 to 40 years old and 25.4 to 35.6 cm (10-14 in.) dbh. Approximately 40 percent of the stems per hectare were removed in the thinning operations. This paper...
Resource Type:: Technical Report
Full Text:: ft3). Many forest managers consider thinning an important silvicultural treatment in imma- ture stands

Creator:: Kellogg, L. D. (Loren D.), Olsen, Eldon D., and Oregon State University. Forest Research Laboratory
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: PRODUCTIVITY OF A SMALL YARDER: CREW SIZE, SKIDDER SWINGING, HOT THINNING WREN D. KELLOGG ELDON D. OLSEN FORE

Creator:: Kellogg, L. D. (Loren D.), Olsen, Eldon D., Hargrave, Michael A., and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: after precommercial thinning. Canadian Journal of Forest Research 10:389-394. FIEBER, W.F., T.A

Creator:: Kellogg, L. D. (Loren D.), Miller, Mark E., Olsen, Eldon D., and Oregon State University. Forest Research Laboratory
Abstract:: 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...
Resource Type:: Technical Report
Full Text:: RC21 Forest Research Laboratory Oregon State

Creator:: Cornell, Jennie L., Kellogg, L. D. (Loren D.), and Oregon State University. Forest Research Laboratory
Abstract:: On-the-ground harvest unit layout, especially in skyline-thinning operations, is critical to meeting multiple resource objectives of the land manager and maintaining the economic viability of the timber harvesting operator. This phase of an operation can optimize the layout and harvesting of a sale or unit. Detailed layout by a knowledgeable...
Resource Type:: Technical Report
Full Text:: Thinning Systems. Research Contribution 45, Forest Research Laboratory, Oregon State Uni- versity

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:: purchasers of the thinning sales, Rosboro Lumber Company and Swanson-Superior Forest Products Inc., also

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:: ), commercial thinning of forest stands could provide a valuable supply of wood and wood fiber. However

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:: called the “Young Stand Thinning and Diversity Project” was undertaken on the Willamette National Forest

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