Download or read book Effects of Thermoperiod on the Early Growth of Red Alder from Different Elevations and Geographic Sources written by Allan Campbell and published by . This book was released on 1973 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was designed to help elucidate what differences, if any, exist within the species Alnus rubra Bong., grown naturally at various elevations and locations throughout the Pacific Northwest and coastal Alaska. Increasing importance of the species, including both economic and silviculture values, prompted the investigation into the early growth of red alder, an area in which detailed information is lacking. Two areas of investigation that were established included, first, an elevational transect from Newport to Marys Peak in the Coast Range of Oregon and, second, a study of ten geographic sources located throughout the range of Alnus rubra. Both phases of this investigation were conducted under three growth regimes involving the use of a 16 hour photoperiod and three thermoperiods (day-night temperatures are: 21°, 16°C; 10°, 10°C and 21°, 21°C). The Transect Study showed differences between red alder conelets (weight and size) and seeds (weights and germination) from different elevations to be significant at the 1% level. The effect of the lower thermoperiod (10°, 10°C) in reducing the rate of germnination was also shown. No significant differences were found between seedlings representing the various elevations in other characteristics (height, diameter and leaf dimension). The Geographic Study, involving wildlings supplied by the U.S. Forest Service, was concerned primarily with seedling height growth and leaf size. Significant differences were found between seedlings from different geographic locations but, because of the limited number of seedlings available, the reliability of the data to accurately express variation between these locations is questionable. The effect of thermoperiod within a single tested environment was also significant but with results that were opposite to those obtained in the Transect Study. In the Geographic Study the height growth of seedlings under the cold condition (10°, 10°C) was significantly greater than for seedlings grown under the other growth conditions. In the Transect Study, the seedlings grown under the cold condition were significantly shorter than those grown under the other regimes.
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by TPRC at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemina tion phases of the activity was transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we have concluded that it will be in the interest of all concerned if the printing and distribution of the volume were handled by a well-known publishing house to assure improved service and better communication. Hence, effective with this Volume 18, Masters Theses in the Pure and Applied Sciences will be disseminated on a worldwide basis by Plenum Publishing Corporation of New York. All back issues can also be ordered from Plenum. As we embark on this new partnership with Plenum, we also initiate a new venture in that this important annual reference work now covers Canadian universities as well as those in the United States. We are sure that this broader base will greatly enhance the value of these volumes.
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by M. A. Radwan and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book O S U Theses and Dissertations 1970 1977 written by Oregon State University and published by . This book was released on 1980 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States written by and published by . This book was released on 1978 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Height Growth and Site Index Curves for Red Alder written by Constance A. Harrington and published by . This book was released on 1986 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Constance A. Harrington and published by . This book was released on 1984 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States July 1973 June 1976 written by and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geographic Variation in Red Alder written by Donald Thomas Lester and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early Wide Spacing in Red Alder Alnus Rubra Bong written by and published by . This book was released on 1985 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Effects of Urea Fertilizer and Red Alder in a Site III Coast Douglas fir Plantation in the Washington Cascade Range written by and published by . This book was released on 2005 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five randomly assigned treatments were used to quantify effects of adding varying numbers of red alder (Alnus rubra Bong.) or nitrogen (N) fertilization on growth of a 10-year-old conifer plantation at a medium quality site in the western Washington Cascade Range. Zero, 20, 40, and 80 alder trees per acre were retained along with about 300 conifers per acre. Nearly all conifers were coast Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco). A fifth treatment substituted N fertilizer for N-fixing alder. Changes in average tree height, and in numbers of trees, basal area, and volume per acre between plantation ages of 10 and 27 are compared. In pure conifer plots, gross volume growth averaged 26 percent greater on fertilized than nonfertilized plots, indicating measurable benefits of additional N. On both fertilized and nonfertilized plots, an average of 13 percent of the original conifers died. Retaining 20, 40, or 80 alder per acre (7, 13, and 27 percent of the associated conifer trees per acre, respectively) was associated with reduced numbers of Douglas-fir by about 19, 5, and 17 percent, respectively, in the next 17 years. Mortality and growth of Douglas-fir were not related to alder density, but losses of Douglas-fir were especially large on plots where relatively large red alder (20 per acre) were retained. Neither total stand nor conifer yields were changed by retaining alder. Additional comparisons are needed at other locations, especially those with known N deficiency.
Download or read book Utilization and Management of Alder written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1978 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Pacific Northwest and British Columbia, red alder often grows on forest lands following natural or man-caused disturbances. Frequently ignored as a pest or weed, many alder stands have developed to the point where important utilization and management questions are being asked. It is recognized that alder is a fast growing species, and that its rapid early growth may hinder growth of conifers associated with it. It is also recognized that alder has the capability of improving soil fertility, and that it may help reduce root rot problems of conifers. These attributes pose new questions as to whether or not alder should be deliberately managed and, if so, how it should be managed and utilized.
Download or read book Germination of Red Alder Seed written by M. A. Radwan and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology and Management of Red Alder written by David E. Hibbs and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red Alder, the Northwest's most common hardwood, is of increasing biological and economic importance to the region. This timely study examines current knowledge about red alder and its role in Northwest forests.
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by M. A. Radwan and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Reliability of Determining Age of Red Alder by Ring Counts written by Dean S. DeBell and published by . This book was released on 1978 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
