Download or read book Red Alder Harvesting Opportunities in Western Oregon written by Donald R. Gedney and published by . This book was released on 1990 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder Harvesting Oppurtunities in Western Oregon written by Ronald R. Gedney and published by . This book was released on 1990 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Projections of Timber Harvest in Western Oregon and Washington by County Owner Forest Type and Age Class written by and published by DIANE Publishing. This book was released on with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Converting Western Oregon Red Alder Stands to Productive Conifer Forests written by Michael C. Bondi and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1992-11 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Norman P. Worthington and published by . This book was released on 1962 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red alder, the most important hardwood in Oregon and Washington, comprises about two-thirds of the hardwood timber resource of the two-State region.
Download or read book The Hardwood Resource in Western Oregon written by John H. Poppino and published by . This book was released on 1984 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Converting Western Oregon Red Alder Stands to Productive Conifer Forests written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the methods commonly used to convert alder forests into conifer forests, as well as the advantages and disadvantages of various conversion systems.
Download or read book General Technical Report PNW GTR written by and published by . This book was released on 2006 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing Red Alder written by David E. Hibbs and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Robert Leslie Deal and published by . This book was released on 2006 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In March 23-25, 2005, an international symposium on red alder was held at the University of Washington Center for Urban Horticulture in Seattle, WA. The symposium was entitled S2Red alder: A State of KnowledgeS3 and brought together regional experts to critically examine the economic, ecological and social values of red alder. The primary goal of the symposium was to discuss new advances in the understanding of red alder biology and silviculture, changing market and nonmarket values, and the current regulatory climate for management of alder. This proceedings includes 14 papers based on oral presentations given at the symposium. These papers highlight some of the key findings from the history, ecology, biology, silviculture and economics sessions presented at the red alder symposium.
Download or read book Juvenile Development of Douglas fir Red Alder and Snowbrush Associations in Western Oregon written by Babiker Ahmed El Hassan and published by . This book was released on 1967 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The juvenile development of Douglas-fir, red alder and snowbrush associations was investigated in western Oregon. The relationship between Douglas-fir and red alder was studied and compared in the Coast, Willamette Valley and Cascade regions. Snowbrush- Douglas-fir stands were sampled in the western Cascades. Alder- Douglas-fir relationships were studied on clearcuts supporting at the same time mixtures of alder and Douglas-fir and open-grown Douglas-fir. Sites where snowbrush and Douglas-fir grew together were selected on the same basis. Total heights of alder and Douglas-fir were expressed as cumulative one-year growth measurements. Canopy height of snowbrush was measured at various ages to determine growth rate. Information pertaining to moisture, vegetation, slope, aspect, elevation and stand structure was recorded at each sample plot. The data were analyzed with the aid of a multiple regression program. Height and (height)2 were treated as independent variables, and annual height increment as the dependent variable. Results indicate that early establishment of Douglas-fir is expected to aid its dominance-takeover and allow it to evade suppression by red alder. Douglas-fir trees growing on wet sites need to be established earlier than those on drier habitats for the same degree of suppression evasion. The rapid juvenile growth rate of red alder is a major threat for the successful establishment of Douglas-fir. Height growth curves of the two species intersected at an earlier age on non-wet as compared to wet sites. The two trees grow in direct competition up to about age 40 years on wet habitats, with alder able to suppress Douglas-fir during this period. Douglas-fir has virtually no chance of survival when it is established concurrently with red alder or after its appearance. Snowbrush retards the growth of Douglas-fir trees during their first ten years of development. Trees that are delayed more than five years in establishment suffer a loss of more than 50% in total height as a result of the suppressive effect of the shrub. It is expected that the trees will compensate for some of this loss, but their growth may never equal that of comparable open-grown Douglas-fir developing under similar conditions.
Download or read book The Structure and Dynamics of Red Alder Communities in the Central Coast Range of Western Oregon written by Gary C. Carlton and published by . This book was released on 1988 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red alder (Alnus rubra Bong.) is a fast-growing pioneer species that colonizes disturbed forest sites west of the Cascade Mountains in the Pacific Northwest. Streambottoms, toe slopes, and mass movement of surface soils have historically provided the scarification and soil moisture necessary for successful regeneration of red alder. During the past century, however, extensive logging activity has greatly increased the availability of suitable conditions for alder establishment. The species has responded by expanding upslope throughout its range, displacing native conifers over large areas. As a relatively short-lived pioneer species, red alder would be expected, by conventional succession theory, to relinquish sites to longer-lived conifers such as Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). However, studies conducted on sites dominated by red alder have found very little tree regeneration, suggesting that shrub species such as salmonberry (Rubus spectabilis Pursh) or vine maple (Acer circinatuin Pursh) may dominate sites after senescence of red alder. In this study, I examined both the understory and overstory components of 44 stands dominated by red alder in the Alsea River drainage of the Oregon Coast Range. Stands ranged in age from 7 to 87 years, the entire span of age classes found within the study area. Using a chronosequence approach, I inferred patterns of stand development and of change in the understory vegetation throughout the lifetime of the canopy dominants. I also evaluated a variety of tree and stand characteristics to relate stand structure and development to site factors and disturbance history. I then employed multivariate procedures to classify and ordinate understory vegetation, culminating in a description of five community-types. Four of the community-types were further differentiated into two variants associated with site factors. Disturbance was found to be important for successful colonization of sites by red alder, but the type of disturbance was not strongly related to structure or productivity of red alder stands. Logging and fire were the most common types of disturbance opening up sites for colonization by red alder. Evidence of logging and fire were observed on 30 and 19 plots, respectively. Landslides and unstable soils were evident on 16 sites. Site conditions such as physiographic position, elevation, and slope were more important determinants of alder stand structure than disturbance agents. Toe slopes had the highest site index values, but stands in midslope positions tended to attain greatest basal area and highest relative density index. Dominance and suppression were exhibited in diameter distribution patterns that expanded and became multimodal as the canopy matured. Self-thinning consistently removed the smallest individuals in young stands, but mortality in larger size classes gradually became important in older stands. Five understory communities are described in this thesis. Swordfern was dominant under most young stands of red alder, with occasional appearance of shrubs normally found on open, disturbed sites. Middle-aged alder stands supported one of three community-types: a mixture of swordfern and several shrub species, a community dominated strongly by swordfern and salmonberry, or a community characterized by dense thickets of salmonberry. Under many stands of senescing red alder, particularly those at high elevation, vine maple was the single dominant, but salmonberry was well represented in old stands at low elevation. Abundance of many non-woody species was found to fluctuate during the growing season. However, certain key species were identified that maintained relatively constant cover during the summer, and these species were used as the characteristic species for classification of communities. Very little tree regeneration was observed under intact red alder canopies or under the discontinuous canopies of senescing alder. In older stands, abundant understory vegetation apparently inhibited tree regeneration through competition for light and other resources and through the direct physical effects of litter deposits on the forest floor. On most sites, succession to communities dominated by salmonberry or vine maple appeared likely, although scattered saplings of western hemlock and western redcedar might eventually form a discontinuous canopy on some sites.
Download or read book Projections of Timber Harvest in Western Oregon and Washington by County Owner Forest Type and Age Class written by Xiaoping Zhou and published by . This book was released on 2005 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Northwest forest resource is highly dynamic. Expected changes over the next 50 years will greatly challenge some current perceptions of resource managers and various stakeholders. This report describes the current and expected future timberland conditions of western Oregon and Washington and presents the results at the county level. About 50 percent of the timber removals in this region will come from 10 west-side counties, and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) will remain the major species removed. Forest industry will account for 50 percent of the total harvest in the Pacific Northwest West. Some inferences about the attributes of future timber and its utilization will be drawn from the projections at the county level over the next half century.
