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Author : Paul E. Aho
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (319 download)
Download or read book Decay in Tops Killed by Douglas-fir Tussock Moth in the Blue Mountains written by Paul E. Aho and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul E. Aho
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (246 download)
Download or read book Decay in Tops Killed by Douglas-fir Tussock Moth in the Blue Mountains written by Paul E. Aho and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul E. Aho
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (319 download)
Download or read book Losses Associated with Douglas-fir and True Fir Tops Killed by Western Spruce Budworm in Eastern Washington written by Paul E. Aho and published by . This book was released on 1984 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Michael Geist
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.F/5 ( download)
Download or read book Physical and chemical properties of some Blue Mountain soils in the northeastern Oregon written by J. Michael Geist and published by . This book was released on 1978 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Boyd E. Wichman
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (319 download)
Download or read book Tree Mortality and Top-kill Related to Defoliation by the Douglas-fir Tussock Moth in the Blue Mountains Outbreak written by Boyd E. Wichman and published by . This book was released on 1978 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Forest Service
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.X/5 (3 download)
Download or read book The Douglas-fir Tussock Moth written by United States. Forest Service and published by . This book was released on 1978 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.3/5 (91 download)
Download or read book USDA Forest Service Research Paper PNW. written by and published by . This book was released on 1978 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan A. Berryman
Publisher : Springer Science & Business Media
ISBN 13 : 1489907890
Total Pages : 608 pages
Book Rating : 4.4/5 (899 download)
Download or read book Dynamics of Forest Insect Populations written by Alan A. Berryman and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects multiply. Destruction reigns. There is dismay, followed by outcry, and demands to Authority. Authority remembers its experts or appoints some: they ought to know. The experts advise a Cure. The Cure can be almost anything: holy water from Mecca, a Government Commis sion, a culture of bacteria, poison, prayers denunciatory or tactful, a new god, a trap, a Pied Piper. The Cures have only one thing in common: with a little patience they always work. They have never been known entirely to fail. Likewise they have never been known to prevent the next outbreak. For the cycle of abundance and scarcity has a rhythm of its own, and the Cures are applied just when the plague of insects is going to abate through its own loss of momentum. -Abridged, with insects in place of voles, from C. Elton, 1924, Voles, Mice and Lemmings, with permission of Oxford University Press This book is an enquiry into the "natural rhythms" of insect abundance in forested ecosystems and into the forces that give rise to these rhythms. Forests form unique environ ments for such studies because one can find them growing under relatively natural (pri meval) conditions as well as under the domination of human actions. Also, the slow growth and turnover rates of forested ecosystems enable us to investigate insect popula tion dynamics in a plant environment that remains relatively constant or changes only slowly, this in contrast to agricultural systems, where change is often drastic and frequent.
Author : Boyd E. Wickman
Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.:/5 (31 download)
Download or read book Research Paper PNW. written by Boyd E. Wickman and published by . This book was released on 1978 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George T. Ferrell
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (319 download)
Download or read book Stem Volume Losses in Grand Firs Topkilled by Western Spruce Budworm in Idaho written by George T. Ferrell and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mature grand firs (Abies grandis [Dougl. ex D. Don] Lindl.) were sampled in two stands, one cutover and one virgin, in the Little Salmon River drainage in west-central Idaho, to estimate stem volume losses associated with topkilling. Damage to the stands resulted from three outbreaks of western spruce budworm (Choristoneura occidentalis Freeman) in 1922-30, 1952-55, and 1969-78. Stems of the firs were dissected and examined for reductions in height and radial growth, stem deformities, and decay associated with topkills. Merchantable volume losses (to a minimum 4-inch diameter top) were calculated for each outbreak. Greatest volume loss was associated with tops killed by the 1922-30 outbreak. Loss varied widely among the trees and stands sampled. In the cutover stand, which received a sanitation cutting in the late 1960's, firs topkilled by the 1922-30 outbreak averaged losses of 9.5 ft3 (0.3 m3), amounting to 11.1 percent of merchantable stem volume. In the vigin stand, losses averaged 26.3 ft3 (0.3 m3) or 20.5 percent of stem volume. Topkill-associated decays, caused mainly by Indian paint fungus (Echinodontium tinctorium Ell. and Ev.) were responsible for most of this loss. Smaller volume losses were recorded in firs topkilled by the 1952-55 outbreak. Losses per tree averaged 3.3 ft3 (0.1 m3) or 5.4 percent in the cutover stand, and 0.5 ft3 (0.02 m3) or 0.3 percent in the virgin stand. These losses resulted mainly from height growth reductions rather than decay. No merchantable volume losses were recorded for the 1969-78 outbreak.
Author : Arthur R. Tiedemann
Publisher :
ISBN 13 :
Total Pages : 730 pages
Book Rating : 4.3/5 (243 download)
Download or read book Research Paper PNW. written by Arthur R. Tiedemann and published by . This book was released on 1977 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.:/5 (319 download)
Download or read book Blue Mountains Forest Health Report written by and published by . This book was released on 1991 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (555 download)
Download or read book Annotated List of Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.3/5 ( download)
Download or read book Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1980 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 356 pages
Book Rating : 4.:/5 (319 download)
Download or read book Technical Bulletin written by and published by . This book was released on 1979 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 756 pages
Book Rating : 4.:/5 (3 download)
Download or read book Research Paper PNW. written by and published by . This book was released on 1978 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (319 download)
Download or read book 1979 Research Accomplishments written by and published by . This book was released on 1980 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
