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Soil Site Relationships In Second Growth Douglas Fir Stands In The Central Oregon Coast Range
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Book Synopsis Soil-site Relationships in Second Growth Douglas-fir Stands in the Central Oregon Coast Range by : Dean Howard Urie
Download or read book Soil-site Relationships in Second Growth Douglas-fir Stands in the Central Oregon Coast Range written by Dean Howard Urie and published by . This book was released on 1959 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Structure of Three Adjacent 22 Year-old Douglas-fir Stands in the Oregon Coast Range by : Miguel A. Espinosa Bancalari
Download or read book Growth and Structure of Three Adjacent 22 Year-old Douglas-fir Stands in the Oregon Coast Range written by Miguel A. Espinosa Bancalari and published by . This book was released on 1985 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Oregon Coast Range, total biomass and biomass increment, leaf area, the relationship between leaf area and sapwood area, and patterns of growth and form of individual trees, were studied in 40 Douglas-fir (Pseudotsuga menziesfi (Mirb.) Franco) trees from three adjacent 22 year-old plantations that had developed at different rates. The estimated total aboveground biomass in the three stands, designated as (1) "slow", (2) "medium", and (3) "fast", were 98.7, 148.2, and 203.7 t.ha-1, respectively, significantly different at the 95 percent level. Total belowground biomass was significantly higher for "fast" with 52.5 t.ha-1 versus 42.0 and 34.4 t.ha-1 for "medium" and "slow" stands. Total aboveground biomass increment was similar for "medium" and "fast" (12.6 and 12.3 t.ha-1yr-1) and was lower for "slow" (8.9 t.ha-1yr-1). Leaf area was significantly greater in "fast" than either of the other two stands. Sapwood area decreased with increasing height in the tree, with stands differing significantly only at breast height (bh). Leaf area to sapwood area ratios varied throughout the stem and were significantly higher for "fast"; the ratio was much lower at bh than at the base of the live crown. Diameter at bh (dbh) and sapwood at the crown base are both strong predictors of crown biomass components. For stem weight the addition of height to dbh reduced bias and increased the precision of estimates. Leaf area was as closely related to dbh as to bh sapwood area. Taking into account mean annual ring width in the sapwood did not improve the leaf area to sapwood area relationship. The results of the stem analysis indicated that growth differences among the stands appeared at a very early age. Differences among the stands in biomass, leaf area, and growth rate, which stem analysis shows to have appeared by at least age seven, may be related to differing soil characteristics. "Slow" soils are lower in nitrogen and phosphorous, and are waterlogged for part of the wet season. "Fast" and "medium" soils are similar to one another, except for a coarse textured C layer at shallower depth in "fast", which may have permitted more rapid root development and better access to water during dry periods.
Book Synopsis USDA Forest Service Research Paper PNW. by :
Download or read book USDA Forest Service Research Paper PNW. written by and published by . This book was released on 1969 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lodgepole Pine Clearcut Size Affects Minimum Temperatures Near the Soil Surface by : P. H. Cochran
Download or read book Lodgepole Pine Clearcut Size Affects Minimum Temperatures Near the Soil Surface written by P. H. Cochran and published by . This book was released on 1969 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth of Douglas-fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range by :
Download or read book Growth of Douglas-fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range written by and published by . This book was released on 2007 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil disturbance is a visually apparent result of using heavy equipment to harvest trees. Subsequent consequences for growth of remaining trees, however, are variable and seldom quantified. We measured tree growth 7 and 11 years after thinning of trees in four stands of coast Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb. Franco)) where soil disturbance was limited by using planned skid trails, usually on dry soils. The three younger stands had responded to nitrogen fertilizer in the 4 years before thinning, but only one stand showed continued response in the subsequent 7- or 11-year period after thinning. The most consistent pattern observed was greater growth of residual trees located next to skid trails. The older stand also showed greater growth in trees located next to skid trails, whereas tillage of skid trails failed to benefit growth of nearby residual trees for the first 7 years after tillage. We conclude that traffic that compacted soil only on one side of residual trees did not reduce growth of nearby trees.
Book Synopsis Principles of Silviculture by : Theodore W. Daniel
Download or read book Principles of Silviculture written by Theodore W. Daniel and published by McGraw-Hill Companies. This book was released on 1979 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth of Douglas-Fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range by : United States Department of Agriculture
Download or read book Growth of Douglas-Fir Near Equipment Trails Used for Commercial Thinning in the Oregon Coast Range written by United States Department of Agriculture and published by CreateSpace. This book was released on 2015-06-26 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil disturbance is a visually apparent result of using heavy equipment to harvest trees. Typical types of soil disturbance from ground-based harvest include displacement, rutting, and compaction. Subsequent consequences of soil disturbance to growth of trees, however, are variable and seldom quantified beyond short-term effects. Despite a persistent need to further quantify tree response to soil disturbance, policies and practices intended to reduce or avoid soil disturbance from logging have been widely adopted on both public and private forest lands in the Pacific Northwest (Adams 2005).
Book Synopsis Effects of Silviculture Activities on Site Quality by : Robert Coats
Download or read book Effects of Silviculture Activities on Site Quality written by Robert Coats and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fifty-year Development of Douglas-fir Stands Planted at Various Spacings by : Donald L. Reukema
Download or read book Fifty-year Development of Douglas-fir Stands Planted at Various Spacings written by Donald L. Reukema and published by . This book was released on 1979 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States by :
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1959 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wildlife Habitats in Managed Rangelands by : Chris Maser
Download or read book Wildlife Habitats in Managed Rangelands written by Chris Maser and published by . This book was released on 1983 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Even-age Management by : Richard K. Hermann
Download or read book Even-age Management written by Richard K. Hermann and published by . This book was released on 1973 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1990-09-30 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Oata Analysis and Synthesis (CINOAS) * at Purdue. University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were 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 had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 33 (thesis year 1988) a total of 13,273 theses titles from 23 Canadian and 1 85 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 33 reports theses submitted in 1988, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Bibliographic Series written by and published by . This book was released on 1960 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forestry Theses Accepted by Colleges and Universities in the United States, January 1956-June 1966 by :
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States, January 1956-June 1966 written by and published by . This book was released on 1978 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Stand Structure and Topography on Growth, Leaf Area and Efficiency of Young Douglas-fir in the Oregon Coast Range by : Elisabeth H. Kaiser
Download or read book The Influence of Stand Structure and Topography on Growth, Leaf Area and Efficiency of Young Douglas-fir in the Oregon Coast Range written by Elisabeth H. Kaiser and published by . This book was released on 1986 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relative influences of stand structure and topographic variation on volume growth, photosynthetic surface area, and stem growth efficiency were determined for six 17 to 23 year old well stocked stands in the central Oregon Coast Range. Plots were assigned to topographic classes (aspect, slope steepness, and slope position), by which stand density, stand growth and efficiency, and individual tree size and growth were compared. Plots were also assigned to classes according to the hardwood content and the same characteristics compared. In addition, individual trees were assigned to and compared by crown dominance classes. Multiple regression analyses were performed to show correlations of growth and efficiency variables with stand structure and topography variables. Results showed that not only stocking levels but also stand structure influence both stand and individual tree volume growth and efficiency. At a given Relative Density, stands with a lower stem density of large trees grew more volume and were more efficient than stands with many small trees. In addition, stands with more variation in tree size were more efficient than were more uniformly sized stands. The effect of stand structure overrode the effect of topography on growth and efficiency with two exceptions: stand volume growth and efficiency were higher on southerly than on northerly aspects and in areas of higher rainfall. In these areas, stands of a given density carried more leaf area, which may help to explain why growth was better there. In the regression analyses, stand volume growth correlated positively with Douglas-fir stand basal area, average annual rainfall, Relative Density, and an aspect variable that indicated better growth on southerly aspects. Stand volume growth correlated negatively with stem density of Douglas-fir. Stand leaf area correlated positively with stand basal area, average annual rainfall, stem density, and south aspects. Stand stem growth efficiency (volume growth per unit of leaf area) correlated positively with Relative Density, individual tree size variance, and southerly aspects, and correlated negatively with stem density and leaf area. Individual tree growth was mostly determined by the tree basal area, although there was a small negative effect of increasing stand basal area. The more dominant a tree was in a stand the greater was its growth, but suppressed trees were the most efficient, whether efficiency was calculated in terms of stem volume growth per unit individual tree leaf area or basal area growth per unit individual tree basal area. The presence of hardwoods of the small size and low densities in this study had no effect on absolute growth, however Douglas-fir grew more efficiently in pure stands than when mixed with hardwoods.
Book Synopsis Forest Soils of the Douglas-fir Region by : Paul E. Heilman
Download or read book Forest Soils of the Douglas-fir Region written by Paul E. Heilman and published by . This book was released on 1981 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
