Download or read book Natural Regeneration After Shelterwood Cutting in a Grant Fir Shasta Red Fir Stand in Central Oregon written by Kenneth W. Seidel and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural Regeneration After Shelterwood Cutting in a Grant Fir Shasta Red Fir Stand in Central Oregon written by Kenneth W. Seidel and published by . This book was released on 1979 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural Regeneration After Shelterwood Cutting in a Grand Fir shasta Red Fir Stand in Central Oregon written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1979 with total page 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 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1980 with total page 1234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1968 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Progress 1974 written by United States. Forest Service and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1974 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1984-03 with total page 1534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 1993 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural Regeneration of Douglas fir in Uneven aged Stands in Southwest Oregon written by Jared M. Gerstein and published by . This book was released on 1999 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The response to various levels of stand density by natural Douglas-fir regeneration, shrub and sprouting hardwood species was studied in the mixed-evergreen-forests of southwest Oregon. Partial-cut old growth (harvested 22-31 years prior) and thinned evenaged (harvested 9-17 years prior) stand types were used as surrogates for intentionally managed uneven-aged stand types, which were not available for this study. A lower number of clearcut and uncut stands were also sampled in order to capture the full range of overstory densities. Harvest preceded the establishment of:>95% of seedlings (trees 15-140 cm height) in thinned (970 seedlings/ha) and partial-cut (1300 seedlings/ha) stand types and, 82% of saplings (trees 1.4-5.0 m height, w/ conical crown shape) in partial-cut (370 saplings/ha) stands. These results indicate that harvest stimulated natural regeneration of Douglas-fir. However, regeneration was not evenly spaced throughout the plots. For example, seedling frequency averaged 0.45 in thinned and 0.46 in partial-cut stands (0-1.0 scale). Frequency and density of regeneration tended to increase as stand density index (SDI) decreased. Height growth of regeneration generally increased as SDI decreased. Sapling height growth in partial-cuts was greatest on steep, south facing slopes compared to other slope and aspect combinations. The fastest growing third of individual seedlings had an average annual leader growth of 10 cm/yr. and saplings 38 cm/yr. Shrub cover averaged 61% and increased with time since harvest and on north facing slopes (adj. r2 = 0.33, p

Download or read book Shelterwood Systems in South central Oregon written by Alan J. Horton and published by . This book was released on 1985 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Regenerating Oregon s Forests written by Brian D. Cleary and published by . This book was released on 1978 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rx for Abies written by Gregory M. Filip and published by . This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stand Structure and Natural Regeneration of Undisturbed Red Fir Forests in the Southern Sierra Nevada Mountains written by Michael G. Barbour and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Influencing the Density of Natural Regeneration in Uniform Shelterwoods Dominated by Douglas fir in the Sub boreal Spruce Zone written by Philip Joseph Burton and published by University of British Columbia Press. This book was released on 2000 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three replicates of a uniform shelterwood trial were established in even-aged stands dominated by Douglas-fir in the SBSdw1 variant northeast of Williams Lake, B.C., with initial harvesting conducted in the summer of 1991. Treatments consisted of a two-stage shelterwood leaving 50% residual basal area (RBA) after the first entry and a three-stage shelterwood leaving 70% RBA, with overstory thinning achieved by hand-falling or by feller-buncher. Treatment units were 1.4 ha in area, with an uncut control (100% RBA) at each site. Seedfall was monitored using ten 0.37 m 2 seedfall traps in each treatment unit, inspected twice a year from 1992 through 1998. The abundance of different ground surface materials was surveyed in 1990, 1991, and 1993. Controlled germination experiments were conducted in 1994, 1995, and 1996. on four seedbed materials (forest floor, live moss, rotting wood, and mineral soil) across all RBA levels. Surveys of the density of natural regeneration were conducted in 1990, 1991, 1993, 1994, and 1996. ... Results to date suggest that a low residual basal area, combined with a high level of forest floor disturbance, is preferable for enhancing conifer regeneration. It is tentatively recommended that a preparatory cut is not necessary for naturally regenerating Douglas-fir under a shelterwood overstory in this zone, and that the seed cut should leave less than 50% residual basal area.

Download or read book Natural Regeneration of Douglas fir and Associasted Species Using Modified Clear cutting Systems in the Oregon Cascades written by Jerry F. Franklin and published by . This book was released on 1963 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: