Download or read book Overstory Removal written by Robert J. Laacke and published by . This book was released on 1986 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overstory removal can offer economic and esthetic advantages over clearcutting and regeneration, but projecting success is difficult. Twenty-nine units on nine operational overstory removal cuts in northern California were studied to determine what factors are related to satisfactory or unsatisfactory stocking after harvest. Stocking determinations were based on number of trees meeting minimum crop tree standards. Although all of the postharvest stands contained adequate numbers of trees, only about half passed minimal stocking standards based on number of trees meeting crop tree criteria. Only 2 of 11 preharvest stand characteristics tested were sufficiently associated with postharvest condition to be identified in discriminant analysis. The two characteristics were arithmetical average diameter at breast height of the overstory and total longitudinal cross-sectional area of the overstory trees. These two variables correctly identified postharvest stands as stocked 83 percent of the time and as unstocked 77 percent of the time, based on preharvest conditions.

Download or read book Retrieving Residue After Overstory Removal in True Fir Northeastern California written by Gary Fiddler and published by . This book was released on 1986 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overstory removal cutting, the most common means of converting old-growth stands to younggrowth stands in California, can produce excessive residues that pose management problems. Utilization is an attractive option for managing residues. However, the cost of residue retrieval and utilization is often prohibitive. Residue retrieval by a private contractor was studied to determine production rates and effectiveness after overstory removal on three blocks in true fir stands in northeastern California. Residues were inventoried before and after residue retrieval to determine the amount removed. The contractor removed 97 percent of the residue specified for retrieval and 68 percent of residue smaller than specifications, for a total of 136 dry tons (123 t). Residues down to about 3 inches (8 cm) in diameter were utilized for fuelwood. Production rates -- 0.53 ton (0.48 t) per man-hour and 0.67 ton (0.61 t) per equipment-hour -- were low (costs high) for several reasons, including the small size of residues and restricted yarding patterns. Damage to the residual stand was negligible.

Download or read book Influence of Overstory Removal and Western Spruce Budworm Defoliation on Growth of Advance Conifer Regeneration in Montana written by Clinton E. Carlson and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Overstory Removal and Residue Treatments Affect Soil Surface Air and Soil Temperature written by Roger D. Hungerford and published by . This book was released on 1987 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth of California Red Fir Advance Regeneration After Overstory Removal and Thinning written by William W. Oliver and published by . This book was released on 1986 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advance regeneration is common under decadent, old-growth stands of California red fir (Abies magnifica A. Murr.). Intense competition for the site's resources can create sapling stands of poor vigor and advanced age. When competition is reduced by overstory removal and thinning, suppressed advance regeneration has been shown to respond with increased growth. But, to select leave trees, land managers need to know which tree characteristics we associated with growth after release and thinning. This paper reports those easily measured tree characteristics found to be most closely associated with growth after 8 years, on the Swain Mountain Experimental Forest in northeastern California.

Download or read book General Technical Report PNW GTR written by and published by . This book was released on 2007 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large scale Silviculture Experiments of Western Oregon and Washington written by Nathan Jeremy Poage and published by . This book was released on 2007 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: We review 12 large-scale silviculture experiments (LSSEs) in western Washington and Oregon with which the Pacific Northwest Research Station of the USDA Forest Service is substantially involved. We compiled and arrayed information about the LSSEs as a series of matrices in a relational database, which is included on the compact disc published with this report and available online at http://www.fs.fed.us/pnw/research/lsse. The LSSEs are both spatially and temporally large scale, with experimental treatment units between 5 and 100 acres and proposed study durations of 20 to 200 years. A defining characteristic of the LSSEs is that a broad range of response variables are measured to characterize the response of forest ecosystems to experimental treatments. We discuss the general value and limitations of the LSSEs and highlight some possible roles that can be played by the LSSEs in addressing management issues emerging at the beginning of the 21st century.

Download or read book Tongass National Forest N F Kuakan Timber Sale written by and published by . This book was released on 2000 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Northwest Baranof Timber Sales written by and published by . This book was released on 1996 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F East Bradford Timber Sale written by and published by . This book was released on 1997 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service Research Paper RM written by Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) and published by . This book was released on 1975 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Logging Damage to Advance Regeneration on an Arizona Mixed Conifer Watershed written by Gerald J. Gottfried and published by . This book was released on 1975 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ochoco National Forest N F and Crooked River National Grassland Proposed Land and Resource s Management Plan LRMP written by and published by . This book was released on 1989 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Land and Resource Management Plan Appendices Final environmental impact statement land and resource management plan Malheur National Forest written by United States. Forest Service. Pacific Northwest Region and published by . This book was released on 1990 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Siskiyou National Forest N F Canyon Integrated Resource Project written by and published by . This book was released on 1992 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Black Hills National Forest N F Nautilus Project written by and published by . This book was released on 2010 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chequamegon Nicolet National Forest N F Twin Ghost Project written by and published by . This book was released on 2010 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: