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Comparative Effects Of Urea Fertilizer And Red Alder In A Site Iii Coast Douglas Fir Plantation In The Washington Cascade Range
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Book Synopsis Comparative Effects of Urea Fertilizer and Red Alder in a Site III, Coast Douglas-fir Plantation in the Washington Cascade Range by :
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.
Book Synopsis Comparative Effects of Urea Fertilizer and Red Alder in a Site III, Coast Douglas-Fir Plantation in the Washington Cascade Range by : United States Department of Agriculture
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 United States Department of Agriculture and published by CreateSpace. This book was released on 2015-06-26 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.
Book Synopsis Comparative Effects of Urea Fertilizer and Red Alder in a Site III, Coast Douglas Fir Plantation in the Washington Cascade Range by : Richard E. Miller
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 Richard E. Miller and published by . This book was released on 2005 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Effects of Precommercial Thinning, Urea Fertilizer, and Red Alder in a Site II, Coast Douglas-fir Plantation by : Richard E. Miller
Download or read book Comparative Effects of Precommercial Thinning, Urea Fertilizer, and Red Alder in a Site II, Coast Douglas-fir Plantation written by Richard E. Miller and published by . This book was released on 1999 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Effects of Precommercial Thinning, Urea Fertilizer, and Red Alder in a Site II, Coast Douglas-fir Plantation by : Richard E. Miller
Download or read book Comparative Effects of Precommercial Thinning, Urea Fertilizer, and Red Alder in a Site II, Coast Douglas-fir Plantation written by Richard E. Miller and published by . This book was released on 1999 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW. written by and published by . This book was released on 1978 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Robert Leslie Deal and published by . This book was released on 2006 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In March 23-25, 2005, an international symposium on red alder was held at the University of Washington Center for Urban Horticulture in Seattle, WA. The symposium was entitled S2Red alder: A State of KnowledgeS3 and brought together regional experts to critically examine the economic, ecological and social values of red alder. The primary goal of the symposium was to discuss new advances in the understanding of red alder biology and silviculture, changing market and nonmarket values, and the current regulatory climate for management of alder. This proceedings includes 14 papers based on oral presentations given at the symposium. These papers highlight some of the key findings from the history, ecology, biology, silviculture and economics sessions presented at the red alder symposium.
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 2006 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Early Survival and Growth of Planted Douglas-fir with Red Alder in Four Mixed Regimes by : Marshall D. Murray
Download or read book Early Survival and Growth of Planted Douglas-fir with Red Alder in Four Mixed Regimes written by Marshall D. Murray and published by . This book was released on 1986 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIMing for Healthy Forests by : Andrew B. Carey
Download or read book AIMing for Healthy Forests written by Andrew B. Carey and published by . This book was released on 2007 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Case Studies of Red Alder and Sitka Alder in Douglas-fir Plantations by : Dan Binkley
Download or read book Case Studies of Red Alder and Sitka Alder in Douglas-fir Plantations written by Dan Binkley and published by . This book was released on 1982 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven case studies of 11 ecosystems were used to examine the effects of nitrogen-fixing alders in Douglas-fir plantations. The first case study quantified nitrogen (N) fixation and aboveground net primary production in a young Sitka alder [Alnus sinuata (Regel) Rydb.] ecosystem. At 5 yr of age, the N fixation (C22H2 reduction) rate of 35 kg ha−1 yr−1 was near the middle of the reported range for this shrubby species. The second case study compared N fixation rates of Sitka alder and red alder (Alnus rubra Bong.) on the same sites. These species exhibited similar nodule activities and had similar nodule:leaf biomass ratios of 7-8%. A mixture of Sitka alder and Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] was estimated to have a current N fixation rate of 20 kg ha−1 yr−1 based on acetylene reduction; N accretion measurements indicated an average N fixation rate of 30 kg ha−1 yr−1 for 23 yr. A mixture of red alder and Douglas-fir on the same site had a current N fixation rate of 130 kg ha−1 yr−1 based on acetylene reduction, with an N accretion rate of 65 kg ha−1 yr−1 for 23 yr. The third case study evaluated the effects of Sitka alder on Douglas-fir growth and nutrition, and on ecosystem production and litterfall. Current Douglas-fir stem growth was 40% greater with Sitka alder, and aboveground ecosystem net primary production was increased 70% with the alder. Litterfall nutrient content was 3 to 7 times greater under the mixed canopy. The fourth and fifth case studies looked at 23 yr-old mixtures of red alder and Douglas-fir in comparison with pure Douglas-fir, on an infertile site and on a fertile site. Red alder had little effect on Douglas-fir size or growth rate on the infertile site, but ecosystem net primary production was tripled. Conversely, net primary production was not increased by red alder on the fertile site, and Douglas-fir size and growth were reduced. The final two case studies evaluated: (1) the conclusions reached in the previous case studies for applicability to red alder/Douglas-fir mixtures in general, and (2) trends in production with stand development up to age 50. These case studies were consistent with the general conclusions of site fertility interactions with red alder/Douglas-fir mixtures. With further stand development, red alder continued to enhance ecosystem production and Douglas-fir growth on infertile sites, with opposite effects on fertile sites. Sitka alder demonstrated a high potential usefulness for interplanting with Douglas-fir, and red alder greatly boosted ecosystem production on infertile sites. Both species merit further development as tools for forest management on N deficient sites.
Book Synopsis Urea Fertilizer Increases Growth of 20-year-old, Thinned Douglas-fir on a Poor Quality Site by : Richard E. Miller
Download or read book Urea Fertilizer Increases Growth of 20-year-old, Thinned Douglas-fir on a Poor Quality Site written by Richard E. Miller and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laminated Root Rot in a Western Washington Plantation by : Richard E. Miller
Download or read book Laminated Root Rot in a Western Washington Plantation written by Richard E. Miller and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.
Book Synopsis Some Effects of Predaceous Birds and Ants on the Western Spruce Budworm on Conifer Seedlings by :
Download or read book Some Effects of Predaceous Birds and Ants on the Western Spruce Budworm on Conifer Seedlings written by and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings by : M. A. Radwan
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:
Book Synopsis Height Growth and Site Index Curves for Red Alder by : Constance A. Harrington
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:
Book Synopsis Fertilizer versus red alder for adding nitrogen to Douglas-fir forests of the Pacific northwest by : Richard E. Miller
Download or read book Fertilizer versus red alder for adding nitrogen to Douglas-fir forests of the Pacific northwest written by Richard E. Miller and published by . This book was released on 1979 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
