Thinning in the Douglas-fir region

by Edward C. Harris

Publisher: Washington Agricultural Experiment Station in [Pullman, Wash.?]

Written in English
Published: Pages: 30 Downloads: 712
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  • Forest thinning.
  • Edition Notes

    Statement[Edward C. Harris, Richard Wm. Dingle]
    SeriesStations circular -- 385., Station circular (Washington Agricultural Experiment Station) -- 385.
    ContributionsDingle, Richard William.
    The Physical Object
    Pagination30 p. ;
    Number of Pages30
    ID Numbers
    Open LibraryOL14206651M

Vegetation response to alternative thinning treatments in young Douglas-fir stands. Pages in C.E. Peterson and D.A. Maguire, eds. Balancing ecosystem values: innovative experiments for sustainable forestry. A large research effort was initiated in the s in western United States and Canada to investigate how the development of old-growth structures can be accelerated in young even-aged stands that regenerated following clearcut harvests, while also providing income and ecosystem services. Large-scale experiments were established to compare effects of thinning Cited by: 7. (click on each photo to enlarge image) Needles: About 1" long with a blunt tip. Needles are green above with 2 white bands underneath. Fruit: Woody cones 2 to 4 inches long; pitchfork-shaped bracts are longer than scales. Cones hang down. Twig: Large pointed buds with reddish-brown, overlapping scales. The Douglas Fir has been the mainstay of the timber industry throughout its primary growing area for a years. Loggers began harvesting the Douglas Fir to make lumber to support the California Gold Rush and it continues to this day to be one of .

Large-scale commercial thinning of young forests in the Pacific Northwest is currently promoted on public lands to accelerate the development of late-seral forest structure for the benefit of wildlife species such as northern spotted owls (Strix occidentalis caurina) and their prey, including the northern flying squirrel (Glaucomys sabrinus).   Aim of this study was to determine the long-term effects of thinning regime with different intensities on the stand and tree social classes development, particularly regarding the old question of compensative effect between stocking and girth improvement using the example of Douglas-fir. Data provide from a thinning experiment in one site of Swiss Central Plateau, from Cited by: 4. Douglas-fir beetle (Dendroctonus pseudotsugae), another close relative of the spruce beetle and mountain pine beetle, is an important native bark beetle of mature Douglas-fir (Pseudotsuga menziesii) forests across most of the aks tend to be associated with mature Douglas-fir forests (average stand diameters greater than 14 inches at feet from the forest floor) . Douglas fir trees (Pseudotsuga menziesii) are also known as red firs, Oregon pines and Douglas r, according to Douglas fir information, these evergreens are not pines, spruce, or even true they are tall, beautiful conifers native to the Pacific Northwest.

It is the Douglas-fir, and there is no other tree like it. Visit one of Oregon’s forests today and find out why. C o n e d e t a i l d p h o t o d b y e J e r i, C h a s e, O D F B r a n c h d e t a i l e p h o t o c b y Je r i w C h a s e, O D F S e l i n g e t i l p h o t o c o urt e sy D a v P w e l, U S D A F oFile Size: KB. Douglas fir: A Class of Its Own. The Coastal variety is mostly found across Vancouver Island (excluding the far northern region) and directly adjacent to the southern mainland coast. In general, these trees grow to be very tall, reaching an average height of approximately 85 meters. The color of the Coastal fir is generally lighter than. Since , three long-term experiments have been established in the British Columbia interior to determine the effects of precommercial thinning (spacing) on the future growth and yield of interior Douglas-fir (Pseudotsuga menziesii var. glauca [Beissn.] Franco) stands under a variety of age, site, and stand conditions. Douglas-fir Manual The late Leith Knowles, the driving force behind recent Douglas-fir research. This book is dedicated to him. Photo: D. Guild Cover Photos: Main photo: Trial No. NN Golden Downs (planted ; trial established ) (D. Evison) Top (left to right): Well-planted young stand (D. Guild) yearold Douglas-fir at Flagstaff Forest (D. Guild) Forest Creek (G. .

Thinning in the Douglas-fir region by Edward C. Harris Download PDF EPUB FB2

FIGURE An estimated 5 million acres of young-growth Douglas-fir in western and Oregon are suitable for thinning under manage­ ment that i fea:ible at should be in young-growth stamh; on favorable topogTaphy accessible from established roads.

TABLE ommercial fm'est land in the Dougla.s-ir region by stand. Theory and Practice of Commercial Thinning in Douglas-Fir. Reprinted from tile JOUHNAL O' FOHES'l'HY, Vol.

59, No.8, Augnst P'chase1 uy the U. Forest Service for Oicial Use thin­ far­ growth Douglas-ir (Pse1ldotsuga menziesii [Mirb.] Franco) within the Douglas-ir region of Oregon and Washington could be termed "ripe for thinning.".

Nine years after variable-density thinning (VDT) on the Forest Ecosystem Study, we examined low understory vegetation in 60 plots of eight stands (four pairs of VDT and control). We compared native, exotic, ruderal, and nonforest species richness among the stands.

We used clustering, ordination, and indicator species analysis to look for distinctive patches of plant. old Douglas fir with 10 per cent hemlock, cedar, balsam fir, and maple. The present second-growth stand originated from natural reproduction after clear felling of the virgin timber inand the stand has been allowed to grow in its natural state until this first thinning took place.

Thinning systems for western Oregon Douglas-fir stands-- what is best for you. (E[xtension] C[ircular] / Oregon State University Extension Service) Unknown Binding – January 1, by William H Emmingham (Author) See all formats and editions Hide other formats and editions. The Amazon Book Review Author interviews, book reviews, editors Author: William H Emmingham.

Get this from a library. Dominant Douglas-fir respond to fertilizing and thinning in southwest Oregon. [Richard E Miller; Pacific Northwest Forest and Range Experiment Station (Portland, Or.)]. Forests, and precommercial thinning in Douglas-fir and mixed hemlock and Douglas-fir, skyline partial cutting, shelterwood cutting, and partial cutting in mature Douglas-fir on the Siuslaw National Forest are described.

BERG, Alan B., Ed. Managing Young Forests in the Douglas-fir Region. School of For., Oregon State University, Corvallis. Measurements of vegetation 5–7 years after treatment revealed that thinning created substantial differences in overstory cover, tree density, and tree basal area among the treatments (Davis et al.,Davis and Puettmann, ).Percent cover of low shrubs (⩽2 m high) was reduced about 40% (P Cited by: Get this from a library.

Fertilization and thinning effects on a Douglas-fir ecosystem at Shawnigan Lake: year growth response. [E R Gardner; Pacific Forestry Centre.] -- "This report documents the year growth response Thinning in the Douglas-fir region book a Douglas-fir (Pseudotsuga menziesii (Mirb) Franco) stand to thinning and urea fertilization.

The initial treatments were carried out when the. Pseudotsuga menziesii is an evergreen conifer species in the pine family, is native to western North America and is known as Douglas fir, Douglas-fir, Oregon pine, and Columbian pine.

There are three varieties: coast Douglas-fir (P. menziesii var. menziesii), Rocky Mountain Douglas-fir (P. menziesii var. glauca) and Mexican Douglas fir (P.

menziesii var. lindleyana).Family: Pinaceae. Guidelines for precommercial thinning of Douglas-fir (USDA Forest Service general technical report PNW) [Reukema, Donald L] on *FREE* shipping on qualifying offers.

Guidelines for precommercial thinning of Douglas-fir Author: Donald L Reukema. response following alternative thinning treatments in young Douglas-fir stands.

Specifically, this in-cludes a year post-thinning comparison among four treatments of: () overstory cover (2) vertical crown structure (3) growth of all Douglas-fir trees (4) growth of the largest Douglas-fir trees that may eventually provide the dominant component.

This study examined the changes in response of first thinning in four Douglas-fir sites in the Coastal Pacific Northwest in multiple positions along stems. Four installations contain one control plot and four thinning plots that were first thinned between 17 to 34 years during todepending on plot relative : David G Briggs, Rapeepan Kantavichai.

These sources of variation in response to thinning lead to different results and different interpretations of conformity to the principles listed above. The Black Rock Unit of the George T. Gerlinger Experimental Forest in Oregon holds one of the largest and oldest Douglas-fir thinning experiments with the native region of this species.

Thinning: Douglas-fir responds well to thinning at an early age or until the trees reach pole and small sawlog size. The method of thinning becomes more important in the sawlog stands. For the thinning response to be good and the danger from tipover and breakage low, care should be taken to leave the stand in a thrifty condition.

During most. Radial growth of grand fir and douglas-fir 10 years after defoliation by the douglas-fir tussock moth in the Blue Mountains outbreak / ([Portland, OR]: U.S.

Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, []), by Boyd E. Wickman and Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust).

response following alternative thinning treatments in young Douglas-fir stands. Specifically, this in-cludes a year post-thinning comparison among four treatments of: (1) overstory cover (2) vertical crown structure (3) growth of all Douglas-fir trees (4) growth of the largest Douglas-fir trees that may eventually provide the dominant component.

Also, thinning douglas fir forest isn't just best for people, it is best for all plants except douglas fir and most animals. One often hears that humans are just like any other species, but we rarely ponder the inverse of this; if humans can overexploit. from four test sites of a Douglas-fir (Pseudostuga men­ ziesii (Mirb.) Franco) thinning trial.

The test sites reflect two age classes, 33 to 35 and 48 to 50 years, with year site index ranging from 35 to 50 m. The acoustic velocity distribution in each plot formed the basis for selecting a stratified sample of 12 trees that were harvested Cited by: we evaluated whether thinning in to year-old Douglas-fir (Pseudotsuga menziesii) stands influenced amount and composit ion of advanced regeneration 5 to 7 years following treatment.

Review Forest Restoration Using Variable Density Thinning: Lessons from Douglas-Fir Stands in Western Oregon Klaus J. Puettmann 1,*, Adrian Ares 2, Julia I.

Burton 3 and Erich Kyle Dodson 1 1 Department of Ecosystems and Society, Oregon State University, Corvallis, ORUSA; [email protected] Size: 2MB. This book is cute.

Not really my kind of book because it's a little sweet for me, but overall enjoyable. I liked the unique elements like the Douglas Fir, the MC being a gardener, the cute neighbours aspect. I seen the twist of fate coming a mile away, which kind of worked for this book. Everyone was cute, everything was cute/5.

To demonstrate the trade-off between physical volume, economic return, and stand diameter, examples of thinning regimes for maximizing volume, forest rent, and soil expectation are compared with an example of maximizing volume without by: 7.

Response to thinning year-old Douglas-fir Item Preview remove-circle U.S. Forest Service Pacific Northwest Region. National Agricultural Library. FEDLINK - United States Federal Collection. American Libraries. Uploaded by associate-adrianna-flores on Decem SIMILAR ITEMS (based on metadata) Pages: 1.

Introduction. Much is known about the effects of thinning on stand characteristics such as volume growth and rates of overstory tree mortality, as well as on individual tree characteristics such as diameter growth and live crown ratio (Smith, ).Several long-term studies have related tree and stand development to such measures of stand density as basal area, stand Cited by: Douglas fir growing west of the Cascade Crest to the Pacific Ocean in the states of Washington, Oregon, and northern California is known as coastal Douglas fir; identified by DF in the grade stamp.

East of the Cascade Crest in the northern “Inland Empire” region, Western Larch (Larix occidentalis) grows intermixed with Douglas Size: 1MB.

Vegetation Of The Douglas-Fir Region Purchased by the Forest Service, U.S. Department of Agriculture for official use. Franklin, Chief Plant Ecologist, PNW Forest and Range Experiment Station, U.S. Forest Service, Corvallis, Oregon Reprinted from "Forest Soils of the Douglas-Fir Region,": a book developed by the members of the Northwest File Size: 8MB.

The Douglas Fir Use Book is intended for the use of architects, engineers, and students preparing for these professions. The chapters include lumber grades, working stresses and stress grades, design data, structural glued laminated lumber, wood preservation, and design loads.

Rocky Mountain Douglas fir G. Lumis. Related species PSEUDOTSUGA GLAUCA (Rocky Mountain Douglas Fir) is the hardier. It tolerates drought, is dense and has more ascending branches. Comments Makes an attractive Christmas tree because the needles do not easily fall off.

When young, its dense growth makes it a beautiful evergreen. Numerous silvicultural strategies have been considered as a means of mitigating the growth losses suffered by Douglas-fir in the presence of SNC, including thinning (Mainwaring et.

Publication date Topics Douglas fir Thinning Economic aspects, Douglas fir Thinning Statistics, Forest thinning Economic aspects, Douglas fir, Douglas fir, Forest thinning Publisher Portland, Or.: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S.

Dept. of Pages: Douglas-fir in the Rocky Mountains (Hermann and Lavender ; Arno ). In the northern part of its range, IDF is limited by cold, especially growing season frost. In dry ecosystems such as the Interior Douglas-fir zone (IDF) of British Columbia, Douglas-fir is the climax species (Arno ; Hope et al.

). Interior Douglas-fir grows in File Size: KB.these should be removed at first thinning. Douglas fir crops and timber benefit greatly from high pruning and again, this should be carried out selectively at an early stage, in conjunction with first thinning.

Subsequent thinnings are purely selective and normal rotation lengths for Douglas fir are between 50 and 60 years.