Production Rates in Commercial Thinning of Young-growth Douglas- Fir PDF Download
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Author: Thomas Cooper Adams
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 462
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Author: Thomas Cooper Adams
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 462
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 846
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 392
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Author: Norman P. Worthington
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ISBN:
Category : Douglas fir
Languages : en
Pages : 132
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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:
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Category : Agriculture
Languages : en
Pages : 130
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Author: Donald F. Flora
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 218
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Book Description
The contributions for over 80 years by scientists at the Pacific Northwest Research Station to developments in economic theory, economic tools, policies, and economic issues are summarized. This is a story of progressive accomplishments set against a constantly changing background of economic and social events.
Author:
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ISBN:
Category : Forests and forestry
Languages : en
Pages : 222
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 1074
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Author:
Publisher:
ISBN:
Category : forests and forestry
Languages : en
Pages : 554
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