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 Western Reforestation written by and published by . This book was released on with total page 1184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Annual Meeting of Western Reforestation Coordinating Committee written by Western Forestry and Conservation Association (U.S.). Western Reforestration Coordinating Committee and published by . This book was released on 1961 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1968-71 include proceedings of the combined meetings of Western Forest Fire Committee, Western Forest Pest Committee, and the Western Reforestation Coordinating Committee.
Download or read book Bibliographic Series written by Oregon. Library. Forest Research Laboratory and published by . This book was released on 1979 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sudan Sudanese written by Osman Hassan Ahmed and published by . This book was released on 1982 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States written by and published by . This book was released on 1966 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States July 1966 June 1973 written by and published by . This book was released on 1979 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology of Alder written by Northwest Scientific Association and published by . This book was released on 1968 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Vegetation Management for Conifer Production written by John Daniel Walstad and published by Wiley-Interscience. This book was released on 1987 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Representing the work of an interdisciplinary team of 20 specialists, this text consolidates, for the first time, the information available on forest vegetation management and integrates this practice with other silvicultural considerations. It provides a conceptual framework as well as a database for improving forest vegetation management decisions. In an accurate and complete mannner, it quantifies opportunities for enhancing forest productivity, illustrates the value of vegetation management treatments in protecting forest resources and investments, outlines the concept of economic thresholds, highlights progress in establishing such limits and consolidates the information on treatment efficacy, advantages and disadvantages and tradeoffs involved. Forest managers will find it useful to evaluate silvicultural prescriptions and investment decisions; forest planners and resource specialists can use it as a reference source for preparing environmental impact assessments; and regulatory officials can use it to train and upgrade the skills of professionals.
Download or read book Real Gardens Grow Natives written by Eileen M Stark and published by Mountaineers Books. This book was released on 2014-09-24 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: CLICK HERE to download sample native plants from Real Gardens Grow Natives For many people, the most tangible and beneficial impact they can have on the environment is right in their own yard. Aimed at beginning and veteran gardeners alike, Real Gardens Grow Natives is a stunningly photographed guide that helps readers plan, implement, and sustain a retreat at home that reflects the natural world. Gardening with native plants that naturally belong and thrive in the Pacific Northwest’s climate and soil not only nurtures biodiversity, but provides a quintessential Northwest character and beauty to yard and neighborhood! For gardeners and conservationists who lack the time to read through lengthy design books and plant lists or can’t afford a landscape designer, Real Gardens Grow Natives is accessible yet comprehensive and provides the inspiration and clear instruction needed to create and sustain beautiful, functional, and undemanding gardens. With expert knowledge from professional landscape designer Eileen M. Stark, Real Gardens Grow Natives includes: * Detailed profiles of 100 select native plants for the Pacific Northwest west of the Cascades, plus related species, helping make plant choice and placement. * Straightfoward methods to enhance or restore habitat and increase biodiversity * Landscape design guidance for various-sized yards, including sample plans * Ways to integrate natives, edibles, and nonnative ornamentals within your garden * Specific planting procedures and secrets to healthy soil * Techniques for propagating your own native plants * Advice for easy, maintenance using organic methods
Download or read book Field Guide to Forest Plants of South central Colorado written by David C. Powell and published by . This book was released on 1987 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frankia and Actinorhizal Plants written by M. Lalonde and published by Springer Science & Business Media. This book was released on 1985-09-30 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Symposium on Frankia and Actinorhizal Plants, held in Montmorency Forest, Laval University, Quebec, Canada on August 5-9, 1984
Download or read book The Woody Plant Seed Manual written by United States. Forest Service and published by Forest Service. This book was released on 2008 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Range Brushlands and Browse Plants written by Arthur William Sampson and published by University of California, Agriculture and Natural Resources. This book was released on 1981 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Effects Guide written by and published by . This book was released on 1994 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Succession written by D. C. West and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Succession-nothing in plant, community, or ecosystem ecology has been so elaborated by terminology, so much reviewed, and yet so much the center of controversy. In a general sense, every ecologist uses the concept in teaching and research, but no two ecologists seem to have a unified concept of the details of succession. The word was used by Thoreau to describe, from a naturalist's point of view, the general changes observed during the transition of an old field to a forest. As data accumulated, a lengthy taxonomy of succession developed around early twentieth century ecologists such as Cooper, Clements, and Gleason. Now, nearer the end of the century, and after much discussion concerning the nature of vegetation communities, where do ecologists stand with respect to knowledge of ecological succession? The intent of this book is not to rehash classic philosophies of succession that have emerged through the past several decades of study, but to provide a forum for ecologists to present their current research and present-day interpretation of data. To this end, we brought together a group of scientists currently studying terrestrial plant succession, who represent research experience in a broad spectrum of different ecosystem types. The results of that meeting led to this book, which presents to the reader a unique summary of contemporary research on forest succession.
Download or read book Traditional Plant Foods of Canadian Indigenous Peoples written by Harriet Kuhnlein and published by Routledge. This book was released on 2020-10-28 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1991, Traditional Plant Foods of Canadian Indigenous Peoples details the nutritional properties, botanical characteristics and ethnic uses of a wide variety of traditional plant foods used by the Indigenous Peoples of Canada. Comprehensive and detailed, this volume explores both the technical use of plants and their cultural connections. It will be of interest to scholars from a variety of backgrounds, including Indigenous Peoples with their specific cultural worldviews; nutritionists and other health professionals who work with Indigenous Peoples and other rural people; other biologists, ethnologists, and organizations that address understanding of the resources of the natural world; and academic audiences from a variety of disciplines.
