Effect Of Date Of Cone Collection And Stratification Period On Germination And Growth Of Douglas Fir Seeds And Seedlings
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U.S.D.A. Forest Service Research Note PNW.
Author | : Pacific Northwest Forest and Range Experiment Station (Portland, Or.) |
Publisher | : |
Total Pages | : 372 |
Release | : 1979 |
Genre | : Forests and forestry |
ISBN | : |
The Woody Plant Seed Manual
Author | : United States. Forest Service |
Publisher | : Forest Service |
Total Pages | : 1240 |
Release | : 2008 |
Genre | : Gardening |
ISBN | : |
Stratification Requirements for Germination of Western Larch (Larix Occidentalis Nutt.) Seed
Author | : Frank C. Sorensen |
Publisher | : |
Total Pages | : 12 |
Release | : 1990 |
Genre | : Western larch |
ISBN | : |
Silvicultural Research and the Evolution of Forest Practices in the Douglas-fir Region
Author | : |
Publisher | : |
Total Pages | : 176 |
Release | : 2007 |
Genre | : Douglas fir |
ISBN | : |
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.
Publications of the Pacific Northwest Forest and Range Experiment Station
Author | : Pacific Northwest Forest and Range Experiment Station (Portland, Or.) |
Publisher | : |
Total Pages | : 308 |
Release | : 1980 |
Genre | : Forests and forestry |
ISBN | : |