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Weather Logging And Tree Growth Associated With Fir Engraver Attack Scars In White Fir
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Book Synopsis Weather, Logging, and Tree Growth Associated with Fir Engraver Attack Scars in White Fir by : George T. Ferrell
Download or read book Weather, Logging, and Tree Growth Associated with Fir Engraver Attack Scars in White Fir written by George T. Ferrell and published by . This book was released on 1973 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir by : George T. Ferrell
Download or read book Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir written by George T. Ferrell and published by . This book was released on 1972 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) Publisher : ISBN 13 : Total Pages :596 pages Book Rating :4.:/5 (89 download)
Book Synopsis USDA Forest Service Research Paper PSW. by : Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Download or read book USDA Forest Service Research Paper PSW. written by Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) and published by . This book was released on 1973 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Fir Borer by : Craig D. Whitesell
Download or read book Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Fir Borer written by Craig D. Whitesell and published by . This book was released on 1974 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ohia forest decline-its severity and rate of spread-was studied by aerial photographic techniques on a 197,000-acre (80,000-ha) portion of the island of Hawaii. In 1954, only 300 acres (121 ha) showed signs of severe decline; by 1972, the acreage of severely affected forest had increased to 85,200 acres (34,480 ha). Rate of decline and current severity were related to mean annual precipitation and to elevation. The epidemic is continuing. Some forests on other Hawaiian islands also display decline symptoms.
Book Synopsis USDA Forest Service Research Paper PSW. by :
Download or read book USDA Forest Service Research Paper PSW. written by and published by . This book was released on with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Blue Mountains Forest Health Report by :
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:
Book Synopsis Dynamics of Forest Insect Populations by : Alan A. Berryman
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.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sierra Ecology Project: Workshop I. An evaluation of possible effects of weather modification upon forest insects and diseases in the American River Basin, California. Workshop II. An evaluation of possible effects of weather modification upon vegetation in the American River Basin, California. Workshop III. An evaluation of possible effects of weather modification upon deer and their habitat in the American River Basin, California by :
Download or read book The Sierra Ecology Project: Workshop I. An evaluation of possible effects of weather modification upon forest insects and diseases in the American River Basin, California. Workshop II. An evaluation of possible effects of weather modification upon vegetation in the American River Basin, California. Workshop III. An evaluation of possible effects of weather modification upon deer and their habitat in the American River Basin, California written by and published by . This book was released on 1978 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sierra Ecology Project written by and published by . This book was released on 1978 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sierra Ecology Project written by and published by . This book was released on 1978 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sierra Ecology Project: Ecological description of the American River Basin. Workshop I. Workshop II. Workshop III by :
Download or read book The Sierra Ecology Project: Ecological description of the American River Basin. Workshop I. Workshop II. Workshop III written by and published by . This book was released on 1978 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications, Cumulative Index by : United States. Superintendent of Documents
Download or read book Monthly Catalog of United States Government Publications, Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir by : George T. Ferrell
Download or read book Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir written by George T. Ferrell and published by . This book was released on 1973 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest Insects by : Alan A. Berryman
Download or read book Forest Insects written by Alan A. Berryman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as a general text for undergraduates studying the manage ment of forest insect pests. It is divided into four parts: insects, ecology, manage ment, and practice. Part I, Insects, contains two chapters. The first is intended to provide an overview of the general attributes of insects. Recognizing that it is impossible to adequately treat such a diverse and complex group of organisms in such a short space, I have attempted to highlight those insectan characteristics that make them difficult animals to combat. I have also tried to expose the insects' weak points, those attributes that make them vulnerable to manipulation by human actions. Even so, this first chapter will seem inadequate and sketchy to many of my colleagues. Ideally, this book should be used in conjunction with a laboratory manual covering insect anatomy, physiology, biology, behavior, and classifica tion in much greater depth-in fact, this is how I organize my forest entomology course. It is hoped that this first chapter will provide nonentomologists with a general feel for the insects and with a broad understanding of their strengths and weaknesses, while Chapter 2 will provide a brief overview of the diverse insect fauna that attacks the various parts of forest trees and their products.
Book Synopsis Using Indicator Plants to Assess Susceptibility of California Red Fir and White Fir to the Fir Engraver Beetle by : George T. Ferrell
Download or read book Using Indicator Plants to Assess Susceptibility of California Red Fir and White Fir to the Fir Engraver Beetle written by George T. Ferrell and published by . This book was released on 1986 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a Vegetation Drought Index (VDI) for estimating the susceptibility of California red and white firs to the fir engraver beetle (Scolytus ventralis) was evaluated in northern California forests where these true firs (Abies species) occur in mixed conifer and true fir stands. Midway through the summer drought, true fir moisture stress-a known predisposing factor-was highest on sites with highest VDI values (most xeric). In mixed conifer stands, the susceptibility of white firs-as indicated by the mean percentage of their basal area killed annually-was highest on sites with highest VDI values. But in true fir stands, the susceptibility of mixed red and white firs was highest on sites with the lowest VDI values. Regression models with VDI, stand basal area, and percentage of true fir as regressors lacked the required predictive range and precision, suggesting that VDI will likely have to be used in combination with predictors other than, or in addition to, those analyzed.
Book Synopsis The Douglas-fir Tussock Moth by : Robert W. Campbell
Download or read book The Douglas-fir Tussock Moth written by Robert W. Campbell and published by . This book was released on 1978 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
