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.
Download or read book Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Fir Borer written by George T. Ferrell and published by . This book was released on 1975 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multivariate regression analysis was used to explore the relationship of weather and tree growth to the average volume of Abies concolor sawtimber killed annually by fir engraver (Scolylus ventralis Lec.) and roundheaded fir borer (Tetropiurn abietis Fall) beetles. Data for the years 1944 to 1954 from 22 plots in northern California showed that white fir mortality increased in years when (a) fir radial growth during the cunent and previous 2 years declined an average of 2.5 percent per year, (b) precipitation during the current and previous years averaged 11 percent below normal, or (c) spring precipitation averaged 32 percent below normal. Levels of mortality were related chiefly to regional fluctuations in radial growth of dominant and intermediate fir.
Download or read book Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Borer written by and published by . This book was released on 1975 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
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:
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:
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:
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:
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:
Download or read book Lindane in forestry written by Thomas W. Koerber and published by . This book was released on 1976 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fir Engraver written by George T. Ferrell and published by . This book was released on 1986 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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:
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:
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:
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:
