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Author : William I. Stein
Publisher : Unknown
Page : 68 pages
File Size : 52,8 Mb
Release : 1999
Category : Douglas fir
ISBN : MINN:31951D02977379S
Author : Anonim
Publisher : Unknown
Page : 196 pages
File Size : 43,9 Mb
Release : 1978
Category : Forests and forestry
ISBN : UCBK:C069156619
Author : Anonim
Publisher : Unknown
Page : 176 pages
File Size : 53,8 Mb
Release : 2007
Category : Douglas fir
ISBN : MINN:31951D02974976P
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 : Anonim
Publisher : Unknown
Page : 618 pages
File Size : 50,7 Mb
Release : 2007
Category : Forests and forestry
ISBN : CORNELL:31924101545782
Author : Anonim
Publisher : Unknown
Page : 92 pages
File Size : 45,8 Mb
Release : 2007
Category : Clearcutting
ISBN : MINN:31951D02974968O
Author : Anonim
Publisher : DIANE Publishing
Page : 90 pages
File Size : 48,5 Mb
Release : 2024-06-07
Category : Electronic
ISBN : 1422324729
Author : Pacific Northwest Research Station (Portland, Or.)
Publisher : Unknown
Page : 112 pages
File Size : 40,5 Mb
Release : 2000
Category : Forests and forestry
ISBN : CORNELL:31924089422756
Author : Anonim
Publisher : Unknown
Page : 648 pages
File Size : 45,7 Mb
Release : 2000
Category : Government publications
ISBN : OSU:32435067290734
Author : Philip M. McDonald
Publisher : Unknown
Page : 24 pages
File Size : 53,6 Mb
Release : 1999
Category : Douglas fir
ISBN : MINN:31951D02988480S
Author : Philip M. McDonald
Publisher : Unknown
Page : 24 pages
File Size : 54,8 Mb
Release : 1996
Category : Douglas-fir
ISBN : MINN:31951D02988486G
Author : Deborah J. Chavez
Publisher : Unknown
Page : 498 pages
File Size : 52,7 Mb
Release : 1993
Category : Forest reserves
ISBN : STANFORD:36105113738178
Author : Richard E. Miller
Publisher : Unknown
Page : 20 pages
File Size : 41,9 Mb
Release : 1996
Category : Douglas fir
ISBN : MINN:31951D02977368X
Author : Anonim
Publisher : Unknown
Page : 4 pages
File Size : 44,9 Mb
Release : 1989
Category : Douglas fir
ISBN : MINN:31951D029646945
Twelve-year-old Douglas-fir saplings on the Mad River Ranger District, Six Rivers National Forest, Califomia were released by cutting competing vegetation in a 9-foot radius to test the timing and efficacy of this method in plantations older than 1 those in which such work traditionally is done--the I first 5 years. Nine years after release, the average stem diameter (3.60 inches or 9.14 cm) of released Douglas-fir saplings, taken at 12 inches (30 cm) above mean groundline, differed significantly from that of mntrol saplings (2.98 inches or 7.57 cm)(p 0.05), although the average height did nor differ (p 0.05). In spite of this finding, the stem diameter of released saplings was 40 percent less than that needed to comply with regional Forest Service growth objectives. Cost of release averaged $428 per acre or $1058/ha in 1978 dollars.
Author : Anonim
Publisher : Unknown
Page : 478 pages
File Size : 41,5 Mb
Release : 1990
Category : Forests and forestry
ISBN : MINN:31951P00129786N
Author : C. Eugene Conrad
Publisher : Unknown
Page : 866 pages
File Size : 47,7 Mb
Release : 1987
Category : Chaparral ecology
ISBN : STANFORD:36105119574353