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Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir
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Book Synopsis Tree Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-fir by : Richard E. Miller
Download or read book Tree Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-fir written by Richard E. Miller and published by . This book was released on 2004 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tree Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-fir by : Richard E. Miller
Download or read book Tree Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-fir written by Richard E. Miller and published by . This book was released on 2004 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1925 Wind River spacing test is the earliest field trial seeking to determine the most appropriate spacing for planting Douglas-fir. Spacing treatments were not replicated, although individual spacings were subsampled by two to four tree-measurement plots. Previously, greater growth occurred at the wider spacings (10 and 12 ft) than at the closer spacings (4, 5, 6, and 8 ft). We considered three possible explanations: (1) close spacing eventually retarded growth, (2) soil quality may be better in the 10- and 12-ft spacings than at closer spacings, and (3) tree spacing and soil quality combined affected growth. To test these explanations, we (1) measured and mapped several site factors (topographic relief, depth to bedrock, and soil properties) and (2) related these factors to tree and stand growth. We infer from the strong correlation between spacing and soil variables that the influence of soil and spacing cannot be separated; differences in soil depth and available water capacity confound spacing effects and vice versa. Because soils in the wider spacings are generally deeper and have more available water capacity than do soils in the closer spacings, we conclude that some of the superior tree growth attained in the 10-and 12-ft spacings is due to more favorable soil conditions. Visual comparisons of tree size, however, suggest that spacing is probably the stronger factor affecting tree growth at this location.
Book Synopsis Three Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-Fir by : United States Department of Agriculture
Download or read book Three Growth and Soil Relations at the 1925 Wind River Spacing Test in Coast Douglas-Fir written by United States Department of Agriculture and published by CreateSpace. This book was released on 2015-06-26 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1925 Wind River spacing test is the earliest field trial seeking to determine the most appropriate spacing for planting Douglas-fir. Spacing treatments were not replicated, although individual spacings were subsampled by two to four tree-measurement plots. Previously, greater growth occurred at the wider spacings (10 and 12 ft) than at the closer spacings (4, 5, 6, and 8 ft). We considered three possible explanations: (1) close spacing eventually retarded growth, (2) soil quality may be better in the 10- and 12-ft spacings than at closer spacings, and (3) tree spacing and soil quality combined affected growth. To test these explanations, we (1) measured and mapped several site factors (topographic relief, depth to bedrock, and soil properties) and (2) related these factors to tree and stand growth. We infer from the strong correlation between spacing and soil variables that the influence of soil and spacing cannot be separated; differences in soil depth and available water capacity confound spacing effects and vice versa. Because soils in the wider spacings are generally deeper and have more available water capacity than do soils in the closer spacings, we conclude that some of the superior tree growth attained in the 10- and 12-ft spacings is due to more favorable soil conditions. Visual comparisons of tree size, however, suggest that spacing is probably the stronger factor affecting tree growth at this location.
Download or read book Research Paper PNW. written by and published by . This book was released on 1978 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relation of Initial Spacing and Relative Stand Density Indices to Stand Characteristics in a Douglas-fir Plantation Spacing Trial by : Robert O. Curtis
Download or read book Relation of Initial Spacing and Relative Stand Density Indices to Stand Characteristics in a Douglas-fir Plantation Spacing Trial written by Robert O. Curtis and published by . This book was released on 2016 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIMing for Healthy Forests by : Andrew B. Carey
Download or read book AIMing for Healthy Forests written by Andrew B. Carey and published by . This book was released on 2007 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Manual for Dryland Afforestation and Management by : G. Singh
Download or read book A Manual for Dryland Afforestation and Management written by G. Singh and published by Scientific Publishers - AFARI. This book was released on 2017-01-01 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Community-oriented conservation of natural resources and promotion and protection of trees in drylands are examples to deal with climatic adversities. This book provides knowledge on climatic, ecological, social and economic condition of dry areas and lay out approaches and strategies to restore degraded lands. There are 15 chapters and first five deals with physiography of Rajasthan, drylands ecology, problems of land degradation, its economic evaluation and the approaches and strategies of restoration and rehabilitation. Next two chapters describe the problems of sand drift, salinity, water logging and effluent inflicted areas and strategies to control them. Chapters 8-10 deal with seed production, quality planting materials, genetic improvement, propagation and planting techniques. Chapters 11-12 describe methods of rain water harvesting and irrigation, and resources conservation for seed sowing and favouring regeneration and successions. Effective management of pests/diseases in nurseries and plantation, growth and yield prediction equations and models, and people's perception and participation in managing forest resources have been described in last 3 chapters. Purpose of this publication is to strengthen the forest functionaries and readers with wide ranging knowledge on land degradation, desertification and eco-biology of drylands; and methods to restore and rehabilitate degrading forest (lands) to increase forest cover, enhance resilience and people livelihoods and improve environmental conditions. Academician, researchers, forest managers, non-government organizations, extension agents and environmentalists can use it in developing, conserving and managing drylands ecosystems for its long lasting beneficial effects. This book is also useful to policy makers in effective planning of restoring, protecting and conserving dryland's ecological and socioeconomic services.
Book Synopsis Some Recent Developments in the Wind River Douglas-fir Plantation Spacing Tests by : Donald L. Reukema
Download or read book Some Recent Developments in the Wind River Douglas-fir Plantation Spacing Tests written by Donald L. Reukema and published by . This book was released on 1959 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silviculture and Ecology of Western U.S. Forests by : John C. Tappeiner
Download or read book Silviculture and Ecology of Western U.S. Forests written by John C. Tappeiner and published by . This book was released on 2007 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: "An essential reference for forest managers, policy makers, forest scientists, and students, this authoritative volume provides a basis for silviculture practices and contemporary management of western forests."--BOOK JACKET.
Book Synopsis Fifty-year Development of Douglas-fir Stands Planted at Various Spacings by : Donald L. Reukema
Download or read book Fifty-year Development of Douglas-fir Stands Planted at Various Spacings written by Donald L. Reukema and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest of Time by : Margaret J. Herring
Download or read book Forest of Time written by Margaret J. Herring and published by . This book was released on 2007 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Wind River Experimental Forest has been called the cradle of forestry in the Pacific Northwest. Located in the Gifford Pinchot National Forest in southwest Washington, the forest is a nexus of groundbreaking discoveries in forest genetics and ecology, and is one of more than seventyfive Forest Service landscapes across the U.S. devoted to forest and range research. Forest of Time follows one hundred years of forest science at Wind River, as social and scientific changes transformed the twentieth century and the Pacific Northwest forest itself. The Forest Service began research at Wind River in 1908 to learn the secrets of the giant Douglas fir. During the course of the century, generations of scientists studied the forest from different angles, and their conclusions changed through time. Initially, Wind River scientists saw the region in need of protec tion from fire and careless logging. They saw scorched, cutover land that required replanting. Later they saw the forest in need of improvement, needing to be freed from pests and unprofitable s pecies and replaced with thrifty, fastgrowing plantations. Wind River soon became a laboratory where foresters from around the world came to learn how to grow the best possible lumber in the shortest amount of time. As plantations replaced natural forest stands, scientists came to Wind River to explore the complexity of oldgrowth forest ecosystems. And today, Wind River is the center of a twentyfirst century exploration of forest canopies and the global connec tion between forests and atmos phere. In Forest of Time, Margaret Herring and Sarah Greene show readers how science grows and changes in unexpec ted ways, much like a forest through time. It is a story of discovery and blindness, of opportunities taken and missed, in a forest dedicated to longterm research.
Book Synopsis Pathogens and Plant Community Structure in an Old-growth Mixed-conifer Forest of the Sierra Nevada, California by : Thomas Ferguson Smith
Download or read book Pathogens and Plant Community Structure in an Old-growth Mixed-conifer Forest of the Sierra Nevada, California written by Thomas Ferguson Smith and published by . This book was released on 2005 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volume Growth Percent Tables for Douglas-fir Trees by : Donald F. Flora
Download or read book Volume Growth Percent Tables for Douglas-fir Trees written by Donald F. Flora and published by . This book was released on 1964 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Spacing in an Even-aged Stand of Douglas-fir by : George R. Staebler
Download or read book Growth and Spacing in an Even-aged Stand of Douglas-fir written by George R. Staebler and published by . This book was released on 1951 with total page 61 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 Volume Equations for Second-growth Douglas-fir by : David Bruce
Download or read book Volume Equations for Second-growth Douglas-fir written by David Bruce and published by . This book was released on 1974 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Height Growth and Site Index Curves for Douglas-fir on Dry Sites in the Willamette National Forest by : Joseph E. Means
Download or read book Height Growth and Site Index Curves for Douglas-fir on Dry Sites in the Willamette National Forest written by Joseph E. Means and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
