Production Rates in Commercial Thinning of Young-growth Douglas- Fir
Author : Thomas Cooper Adams
Publisher :
Page : 462 pages
File Size : 40,28 MB
Release : 1967
Category : Douglas fir
ISBN :
Author : Thomas Cooper Adams
Publisher :
Page : 462 pages
File Size : 40,28 MB
Release : 1967
Category : Douglas fir
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Author :
Publisher :
Page : 846 pages
File Size : 47,1 MB
Release : 1965
Category : Forests and forestry
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Author :
Publisher :
Page : 392 pages
File Size : 19,74 MB
Release : 1978
Category : Forests and forestry
ISBN :
Author : Norman P. Worthington
Publisher :
Page : 132 pages
File Size : 34,54 MB
Release : 1961
Category : Douglas fir
ISBN :
Author :
Publisher :
Page : 128 pages
File Size : 36,43 MB
Release : 2004
Category : Douglas fir
ISBN :
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 :
Page : 130 pages
File Size : 25,25 MB
Release : 1961
Category : Agriculture
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Author : Donald F. Flora
Publisher :
Page : 218 pages
File Size : 17,18 MB
Release : 2003
Category : Forest management
ISBN :
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 :
Publisher :
Page : 222 pages
File Size : 23,24 MB
Release : 1977
Category : Forests and forestry
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Author :
Publisher :
Page : 1074 pages
File Size : 13,34 MB
Release : 2002
Category : Forests and forestry
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Author :
Publisher :
Page : 554 pages
File Size : 20,1 MB
Release : 1977
Category : forests and forestry
ISBN :