Crop Rotation of Douglas-fir and Red Alder
Author | : W. A. Atkinson |
Publisher | : |
Total Pages | : |
Release | : 1979 |
Genre | : |
ISBN | : |
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Author | : W. A. Atkinson |
Publisher | : |
Total Pages | : |
Release | : 1979 |
Genre | : |
ISBN | : |
Author | : Marshall D. Murray |
Publisher | : |
Total Pages | : 20 |
Release | : 1986 |
Genre | : Douglas fir |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 36 |
Release | : 2005 |
Genre | : Douglas fir |
ISBN | : |
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.
Author | : Robert Leslie Deal |
Publisher | : |
Total Pages | : 160 |
Release | : 2006 |
Genre | : Red alder |
ISBN | : |
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.
Author | : Richard E. Miller |
Publisher | : |
Total Pages | : 32 |
Release | : 1999 |
Genre | : Douglas fir |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 328 |
Release | : 2006 |
Genre | : Forests and forestry |
ISBN | : |
Author | : Marshall D. Murray |
Publisher | : |
Total Pages | : 13 |
Release | : 1986 |
Genre | : |
ISBN | : |
Author | : Marshall D. Murray |
Publisher | : Forgotten Books |
Total Pages | : 26 |
Release | : 2018-09-16 |
Genre | : Business & Economics |
ISBN | : 9780365072294 |
Excerpt from Early Survival and Growth of Planted Douglas-Fir With Red Alder in Four Mixed Regimes Keywords: Silvicultural systems, mixed stands, competition (plant), nitrogen fixation, Douglas-fir, Pseudotsuga menziesii, red alder, Alnus rubra. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author | : Richard E. Miller |
Publisher | : |
Total Pages | : 18 |
Release | : 1979 |
Genre | : Douglas fir |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 52 |
Release | : 1978 |
Genre | : |
ISBN | : |