Silvicultural Options for Young-growth Douglas-fir Forests PDF Download
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Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 128
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Book Description
This report describes the origin, design, establishment and measurement procedures and first results of a large long-term cooperative study comparing a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii) stands managed for multiple objectives. Regimes consist of (1) conventional clearcutting followed by intermediate thinning; (2) retention of reserve trees to create a two-aged stand; (3) small patch cuts dispersed within a thinned matrix, repeated at approximately 15-year intervals to create a mosaic of age classes; (4) group selection within a thinned matrix on an approximate 15-year cycle; (5) continued thinning on an extended rotation; and (6) an untreated control. Each of these regimes is on operationsize units (about 30 to 70 acres each). Output variables to be evaluated include conventional timber growth and yield statistics, harvest costs, sale layout and administration costs, aesthetic effects and public acceptance, soil disturbance, bird populations, and economic aspects. Descriptive statistics and some initial results are presented for the first replicate, established in 1997-98.
Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 128
Get Book Here
Book Description
This report describes the origin, design, establishment and measurement procedures and first results of a large long-term cooperative study comparing a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii) stands managed for multiple objectives. Regimes consist of (1) conventional clearcutting followed by intermediate thinning; (2) retention of reserve trees to create a two-aged stand; (3) small patch cuts dispersed within a thinned matrix, repeated at approximately 15-year intervals to create a mosaic of age classes; (4) group selection within a thinned matrix on an approximate 15-year cycle; (5) continued thinning on an extended rotation; and (6) an untreated control. Each of these regimes is on operationsize units (about 30 to 70 acres each). Output variables to be evaluated include conventional timber growth and yield statistics, harvest costs, sale layout and administration costs, aesthetic effects and public acceptance, soil disturbance, bird populations, and economic aspects. Descriptive statistics and some initial results are presented for the first replicate, established in 1997-98.
Author: Forest Service U.S. Department of Agriculture, Forest Service
Publisher: CreateSpace
ISBN: 9781508448136
Category : Reference
Languages : en
Pages : 124
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Book Description
Descriptive statistics and some initial results are presented for an operation-scale study being conducted by Pacific Northwest Research Station and the Washington Department of Natural Resources in cooperation with the University of Washington and University of Idaho. The study compares a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in western Washington managed for multiple objectives. The first replicate was established in 1997-98. A second replicate was harvested in the summer of 2002 and a third is planned for 2004.
Author: Robert O. Curtis
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
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Book Description
Author: Robert O. Curtis
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Nancy K. Allison
Publisher:
ISBN:
Category : Silvicultural systems
Languages : en
Pages : 272
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Book Description
Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 132
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Book Description
Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 132
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Book Description
Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 176
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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: Society of American Foresters
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 96
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Book Description
Author: David M. Smith
Publisher:
ISBN:
Category : Gardening
Languages : en
Pages : 552
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Book Description
Revised classic text for the second course in the forestry curriculum. Extensively rewritten and redesigned, it contains one new chapter (fitting species to the site) and updating throughout on developments in genetics, ecology, and forestry economics. Expanded for international studies.
