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Volume Growth And Response To Thinning Anf Fertilizing Of Douglas Fir Stands In Southwestern Oregon
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Book Synopsis Volume Growth and Response to Thinning Anf Fertilizing of Douglas-fir Stands in Southwestern Oregon by : Richard E. Miller
Download or read book Volume Growth and Response to Thinning Anf Fertilizing of Douglas-fir Stands in Southwestern Oregon written by Richard E. Miller and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volume Growth and Response to Thinning and Fertilizing of Douglas-fir Stands in Southwestern Oregon by : Richard E. Miller
Download or read book Volume Growth and Response to Thinning and Fertilizing of Douglas-fir Stands in Southwestern Oregon written by Richard E. Miller and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volume Growth and Response to Thinning and Fertilizing of Douglas-fir Stands in Southwestern Oregon by : Richard E. Miller
Download or read book Volume Growth and Response to Thinning and Fertilizing of Douglas-fir Stands in Southwestern Oregon written by Richard E. Miller and published by . This book was released on 1988 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Initial Thinning Effects in 70- to 150-year-old Douglas-fir-western Oregon and Washington by : Richard L. Williamson
Download or read book Initial Thinning Effects in 70- to 150-year-old Douglas-fir-western Oregon and Washington written by Richard L. Williamson and published by . This book was released on 1971 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response to Commercial Thinning in a 110-year Old Douglas-fir Stand by : Richard L. Williamson
Download or read book Response to Commercial Thinning in a 110-year Old Douglas-fir Stand written by Richard L. Williamson and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth of Douglas-fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range by :
Download or read book Growth of Douglas-fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range written by and published by . This book was released on 2007 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil disturbance is a visually apparent result of using heavy equipment to harvest trees. Subsequent consequences for growth of remaining trees, however, are variable and seldom quantified. We measured tree growth 7 and 11 years after thinning of trees in four stands of coast Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb. Franco)) where soil disturbance was limited by using planned skid trails, usually on dry soils. The three younger stands had responded to nitrogen fertilizer in the 4 years before thinning, but only one stand showed continued response in the subsequent 7- or 11-year period after thinning. The most consistent pattern observed was greater growth of residual trees located next to skid trails. The older stand also showed greater growth in trees located next to skid trails, whereas tillage of skid trails failed to benefit growth of nearby residual trees for the first 7 years after tillage. We conclude that traffic that compacted soil only on one side of residual trees did not reduce growth of nearby trees.
Book Synopsis Applicability of Four Regional Volume Tables for Estimating Growth Response to Thinning in Douglas Fir by : Richard L. Williamson
Download or read book Applicability of Four Regional Volume Tables for Estimating Growth Response to Thinning in Douglas Fir written by Richard L. Williamson and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thinning in Mature Douglas-fir Stands in Southwest Oregon by : Max Bennett
Download or read book Thinning in Mature Douglas-fir Stands in Southwest Oregon written by Max Bennett and published by . This book was released on 2018 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is part of the Alternative Forest Management series. It describes a case study on thinning in the mature Douglas-fir stands common to interior southwestern Oregon, many of which have become very dense and are at risk of loss due to wildfire, drought, and insect attack. Following a wide thinning from below, nearly all the trees in the study responded with increased growth and improved resistance to stressors.
Book Synopsis Volume Growth Response to Fertilization in Young Douglas-fir Stands by : Linda Heath
Download or read book Volume Growth Response to Fertilization in Young Douglas-fir Stands written by Linda Heath and published by . This book was released on 1988 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Changes in Costs of Shipping Forest Products by Rail by : Kristine C. Jackson
Download or read book Recent Changes in Costs of Shipping Forest Products by Rail written by Kristine C. Jackson and published by . This book was released on 1988 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilizing Douglas-fir Forests by : Richard E. Miller
Download or read book Fertilizing Douglas-fir Forests written by Richard E. Miller and published by . This book was released on 1979 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dominant Douglas-fir Respond to Fertilizing and Thinning in Southwest Oregon by : Richard E. Miller
Download or read book Dominant Douglas-fir Respond to Fertilizing and Thinning in Southwest Oregon written by Richard E. Miller and published by . This book was released on 1974 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilization and Thinning Effects on a Douglas-fir Ecosystem at Shawnigan Lake by : Stephen A. Y. Omule
Download or read book Fertilization and Thinning Effects on a Douglas-fir Ecosystem at Shawnigan Lake written by Stephen A. Y. Omule and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of the Shawnigan Lake Project (SLP), which was initiated in 1970, is to study the mechanisms of response to thinning and fertilization. The SLP study is composed of two components: a) the main experiment, and b) subsidiary studies. The main experiment, established in 1971--1972 (36 plots), investigated the effects of thinning and fertilization, and consisted of three levels of thinning and five levels of fertilization, including controls. This report focuses on the main experiment and the 32-year growth response for selected stand attributes. Report sections cover the experiment's study area and experimental design; database description; analysis methods outline; study results; and conclusions based on the experiment and results.--Includes text from document.
Book Synopsis The Effects of Thinning on Stand and Tree Growth in a Young, High Site Douglas-fir Stand in Western Oregon by : David D. Marshall
Download or read book The Effects of Thinning on Stand and Tree Growth in a Young, High Site Douglas-fir Stand in Western Oregon written by David D. Marshall and published by . This book was released on 1990 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 percent increase in diameter growth. Subsequent crown type thinning treatments retained eight different, predetermined percentages of the gross basal area growth on the control plots. At age 45, diameter growth remains strong on the heavily thinned treatments, but decreases with increased growing stock. Gross volume growth increased with growing stock, while gross basal area growth was much less influenced by growing stock. Volume growth was strongly related to density because of the rapid height growth of this young stand. Heavy thinnings reduced volume production because of the depletion of growing stock. Total volume production was only slightly reduced on the light thinnings, whereas merchantable volume was greater than the unthinned control. Mortality was heavy on the control, but negligible on the treated plots. Heavy mortality in the last period, reduced net volume growth on the control to less than the treatments. Periodic annual increment (PAI) for cubic foot volume appear to have culminated for the treatments, although they are nearly twice the mean annual increments on the thinned plots. Board foot volume PAI does not appear to have culminated for any of the treatments. The diameter growth of individual trees was particularly influenced by the amount of density in trees larger than any given tree. Density had only a minor effect on height growth. Trees in lower densities had longer crowns and greater taper. Results from simulations of alternative thinning regimes show the desirability of early thinnings. Compared to thinning from below, crown thinning appeared to give the greatest release to the residual stand and produce high volume growth. Management must consider the trade-off s between greater diameter growth at low densities and greater volume growth at high densities.
Book Synopsis Effects of Stand Density Reduction on Structural Development in Western Oregon Douglas-fir Forests by : John Duff Bailey
Download or read book Effects of Stand Density Reduction on Structural Development in Western Oregon Douglas-fir Forests written by John Duff Bailey and published by . This book was released on 1996 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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% volume removal. Overstory and intermediate tree characteristics, conifer and hardwood regeneration, and shrub/herbaceous species composition and cover were recorded. From this, I assessed whether thinning young stands promoted vegetation structure and composition associated with old-growth stands. Overstory trees in thinned stands had diameters, live crown ratios, crown radii, and radial growth rates greater than those in unthinned stands, and equal to or approaching those found in old-growth stands. Stand volume production was neither affected by earlier clearcut harvesting nor by thinning. Intermediate trees in thinned stands, like old-growth stands, were typically young saplings with radial growth rates and live crown ratios greater than those in unthinned stands (typically suppressed members of the original cohort). Living intermediate structure (multi-storied canopies) was common to thinned and old-growth stands. Given such overstory and intermediate tree responses, canopy leaf area in stands thinned>20 years previously was greater than in unthinned stands. Conifer regeneration density, frequency and growth rates were greater in thinned stands than in old-growth and unthinned stands. Densities and frequencies of tall shrubs were similar in thinned and old-growth stands, and greater than unthinned stands. Low shrub and herbaceous cover were 33% and 25% greater, respectively, in thinned than other stand types. Herbaceous species frequency and richness were similarly stimulated. Low shrub composition was altered by thinning (unthinned and old-growth stands did not ordinate differently). However, herbaceous species composition was similar across all stand types and showed more variability among sites than among stand types. Thinning appeared to create old-growth-type structure by stimulating overstory and intermediate tree crowns and growth rates, tall shrub densities and conifer regeneration. Though low shrub and herbaceous species cover and frequency were greatest in thinned stands, composition was not affected by thinning, nor by clearcut harvesting 50 to 120 years ago or other differences in stand origin.
Book Synopsis Net Basal Area Response 9 Years After Fertilizing Thinned and Unthinned Douglas-fir by : British Columbia. Ministry of Forests
Download or read book Net Basal Area Response 9 Years After Fertilizing Thinned and Unthinned Douglas-fir written by British Columbia. Ministry of Forests and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response of Douglas-fir Seedlings to Nitrogen, Sulfur, and Phosphorus Fertilizers by : M. A. Radwan
Download or read book Response of Douglas-fir Seedlings to Nitrogen, Sulfur, and Phosphorus Fertilizers written by M. A. Radwan and published by . This book was released on 1985 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
