Weather And Tree Growth Associated With White Fir Mortality Caused By Fir Engraver And Roundheaded Fir Borer

Author : Craig D. Whitesell
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.09/5 ( download)

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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.

Author : Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Publisher :
ISBN 13 :
Total Pages : 596 pages
Book Rating : 4.93/5 ( download)

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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:

Author : George T. Ferrell
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.3N/5 ( download)

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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:

Author :
Publisher :
ISBN 13 :
Total Pages : 584 pages
Book Rating : 4.24/5 ( download)

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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:

Author : Alan A. Berryman
Publisher : Springer Science & Business Media
ISBN 13 : 1489907890
Total Pages : 608 pages
Book Rating : 4.99/5 ( download)

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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 :
Publisher :
ISBN 13 :
Total Pages : 2834 pages
Book Rating : 4.64/5 ( download)

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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:

Author :
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.34/5 ( download)

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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 : George T. Ferrell
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.01/5 ( download)

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Download or read book Ten-year Risk-rating Systems for California Red Fir and White Fir written by George T. Ferrell and published by . This book was released on 1989 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.4U/5 ( download)

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Download or read book Fifty Years of Forestry Research written by Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) and published by . This book was released on 1977 with total page 262 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 : 4.96/5 ( download)

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Download or read book USDA Forest Service General Technical Report PSW. written by Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) and published by . This book was released on 1976 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: