Author: David W. Hann Publisher: ISBN: Category : Forests and forestry Languages : en Pages : 32
Book Description
Summaries from 49 published articles on site-index and dominant-heightgrowth curves and equations are presented for 20 tree species or species groups found in California, Oregon, Washington, British Columbia, southeastern Alaska, Idaho, and western Montana. The summaries are organized by species. Each summary describes the modeling approach, type of curves/ equations, base age, and type of age presented in the article. In addition, the geographic location, number of trees or plots, range in age, and range in site index used to develop the curves/equations are also described.
Author: Publisher: ISBN: Category : Douglas fir Languages : en Pages : 176
Book Description
Silvicultural practices in the Douglas-fir region evolved through a combination of formal research, observation, and practical experience of forest managers and silviculturists, and changing economic and social factors. This process began more than a century ago and still continues. It has had a great influence on the economic well-being of the region and on the present characteristics of the regions forests. This long history is unknown to most of the public, and much of it is unfamiliar to many natural resource specialists outside (and even within) the field of silviculture. We trace the history of how we got where we are today and the contribution of silvicultural research to the evolution of forest practices. We give special attention to the large body of information developed in the first half of the past century that is becoming increasingly unfamiliar to both operational foresters andperhaps more importantlyto those engaged in forestry research. We also discuss some current trends in silviculture and silviculture-related research.
Author: Robert O. Curtis Publisher: ISBN: Category : Forest site quality Languages : en Pages : 92
Book Description
This paper reviews purposes and procedures for establishing and maintaining permanent plots for silvicultural and yield research, sampling and plot design, common errors, and procedures for measuring and recording data. It is a revision and update of a 1983 publication. Although some details are specific to coastal Pacific Northwest conditions, most of the material is widely applicable.
Author: David Zilberman Publisher: Springer Nature ISBN: 3031248236 Category : Business & Economics Languages : en Pages : 246
Book Description
This is an open access book. This edited volume discusses topics in environmental economics with a focus on sustainability, conservation, and responsible resource management. Written in memory of Peter Berck, Professor of Agricultural and Resource Economics at the University of California, Berkeley, the chapters expand upon his insights about the connections between human activities and the natural world. The volume includes a selection of research on agriculture, energy, forestry, fisheries, land use, recycling, and conservation – all parts of the broad question of how natural resources can meet human needs while avoiding environmental degradation. Written from a 21st century perspective, with concerns about climate, renewable energy, biodiversity, and sustainable development, this volume will be of interest to researchers and students of agricultural and resource economics.
Author: National Research Council Publisher: National Academies Press ISBN: 0309082951 Category : Science Languages : en Pages : 449
Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
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Author: National Research Council