In previous research on the process for making groundwood in a double-disk refiner, a theoretical stress analysis indicated that tracheids of Pinus taeda L. may fail while under torsional stress and unwind into ribbonlike elements. Such elements provide the coherence necessary for strength…
Keywords: Mechanical pulps, hip groundwood, tracheids, cell structure, mechanical properties, southern pines, Pinus taeda
Source: Svensk Papperstidning 9(319-321
In previous research with refiner mechanical pulps, a theoretical stress analysis indicated that longitudinal tracheids of Pinus taeda L. fail while under torsional stress and unwind into ribbonlike elements that provide the coherence necessary for strength development. When macerated tracheids of…
Keywords: Mechanical pulping, southern pines, disk refiners, design, energy consumption, chip groundwood, fibers, hand sheets, mechanical properties
Source: Svensk Papperstidning 18(567-574
This publication, a compilation of 20 papers concerning nursery production of longleaf pine seedlings in containers for reforestation, is a summary of longleaf pine workshops held in 1999 and 2001. The Longleaf Alliance and the USDA Southern Research Station and Southern Region Cooperative Forestry…
Keywords: Forest tree nurseries, Pinus palustris, reforestation, seed and seedling physiology, southern pines
Source: Gen. Tech. Rep. SRS-56. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 63 p.
Wood preservatives extend the useful service life of all wooden commodities used above ground and in ground contact, Over SO years ago, the USDA-Forest Products Lab established tests in a high decay and high termite hazard zone in southern Mississippi. During the last five decades, periodic reports…
Keywords: Preservatives, posts, efficacy, performance, life span, southern pines, wood preservatives, wood poles, preservation, decay, southern yellow pine, resistance to decay, durability, service tests
Source: Proceedings, one hundred first annual meeting of the American Wood-Preservers' Association ... New Orleans, Louisiana, May 15-17, 2005, volume 101. Birmingham, Ala. : American Wood Preservers' Association, 2005: pages 136-143.
In the southern United States, the turn of the 20th century saw the high-grading of virgin pine stands that left millions of acres of forestland in desperate condition. Some of these southern pine stands now support thriving forests whose patterns and processes resemble those extant before they…
Keywords: restoration, silviculture, ecology, southern pines, conservation forestry
Source: In: Deal, Robert L., tech. ed. Integrated restoration of forested ecosystems to achieve multiresource benefits: proceedings of the 2007 national silviculture workshop; 2007 May 7-10; Ketchikan, AK. Gen. Tech. Rep. PNW-GTR-733. Portland, OR: USDA-Forest Service, Pacific Northwest Research Station: 23-35
Because of the large percentage of juvenile wood in small-diameter southern pine, this material has lower strength properties compared with the historic published values in the ASTM Standard D2555. Finding new, simple, and inexpensive ways of increasing these strength properties would increase the…
Keywords: Composite materials, mechanical properties, elasticity, wood plastic composites, monomers, plastic-impregnated wood, deterioration, southern pines, bending, wood density, juvenile wood, polymers, polymerization, strength, wood-plastic materials, modulus of elasticity, impregnation, 1, 6-hexanediol dimethacrylate, smallwood, bending strength, small-diameter timber, small timbers, stiffness
Source: Forest products journal. Vol. 59, no. 10 (Oct. 2009): pages 64-71.
To satisfy the increasing demand for forest products, much of the future timber supply will be from improved trees grown on managed plantations. This fast-grown resource will tend to be harvested in short age rotations and will contain higher proportions of juvenile wood than that of current…
Keywords: Juvenile wood, southern pines
Source: Gen. Tech. Rep. FPL-GTR-129. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 42 p.
Contains 27 papers and 14 extended abstracts from the symposium "Shortleaf pine restoration and ecology in the Ozarks" held November 7-9, 2006, at the University Plaza Hotel and Convention Center in Springfield, MO.
Keywords: woodland restoration, southern pines, pine regeneration and management, tree improvement, wildlife diversity
Source: Gen. Tech. Rep. NRS-P-15. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 215 p.
In many parts of the world, efforts are being made to recycle chromated copper arsenate (CCA)-treated materials. While positive steps have been taken to identify CCA-treated lumber in the waste stream, little has been done to find a fast and accurate means to ascertain the level of preservative…
Keywords: Laser-induced breakdown spectroscopy, chromium, copper, arsenic, wood preservatives, environmental aspects, preserved wood, regression analysis, southern pines, X-ray spectroscopy, wood waste, recycling, preservatives, chromated copper arsenate, CCA, treated wood, preservative treated wood, copper chrome arsenates, southern pine
Source: Forest products journal. Vol. 59, no. 3 (Mar. 2009): pages 67-74.
A modified version of the Midwest Guardrail System (MGS), utilizing small-diameter round wood posts, was developed, tested, and evaluated. Three systems were developed using different species of timber, Douglas Fir, Ponderosa Pine, and Southern Yellow Pine. A combination of Barrier VII computer…
Keywords: Highway safety, wood posts, round posts, MGS, longitudinal barrier, w-beam guardrail, Douglas fir, ponderosa pine, Southern yellow pine, crash testing, roads, guard fences, wood poles, utilization, southern pines, Midwest Guardrail System, posts, small timbers, smallwood, small diameter timber, guardrails, roundwood
Source: Lincoln, Neb. : Midwest Roadside Safety Facility, University of Nebraska-Lincoln, 2007: 436 pages.