Index Catalog // ScholarsArchive@OSU

Pulping qualities of refractory vs. permeable douglas-fir heartwood

Creator:: Blackman, Gary Lee
Abstract:: Heartwood samples of Pacific Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii) and Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) were rated for relative liquid permeability, and evaluated for kraft pulping characteristics. Highly impermeable wood of the Rocky Mountain variety was termed "refractory," while the pervious wood of the Pacific Coastal variety...
Resource Type:: Masters Thesis

Survival of planted Douglas-fir seedlings on severe sites using the paper sheet mulch planting method

Creator:: Bradley, Robert F.
Abstract:: Two studies were undertaken in search of a method or methods which might improve the survival of planted Douglas-fir seedlings on severe sites. The first, or preliminary study involved the planting of 2-0 Douglas-fir seedlings on southerly aspects, using nine techniques, including a control. The second, or main study involving...
Resource Type:: Masters Thesis

A review of the present methods of measuring stand density and a presentation of new research on the application of Crown Competition Factor to Douglas-fir

Creator:: Hicks, Thomas Harney
Abstract:: It is the purpose of this paper to explore the possible application of this relatively new method to second-growth Douglas-fir stands.
Resource Type:: Capstone Project

Evaluating radial compression, color indicator and micro-toughness tests to detect early decay in Douglas-fir

Creator:: Smith, Susan M.
Abstract:: Three methods--radial compression strength, color indicators of decay and micro-toughness, an examination of tracheid fracture patterns, were evaluated for detection of early decay and for application to field use. Three-eighth-inch diameter plugs 3/4-inch long, cut from the sapwood and heartwood of a Douglas-fir pole free of decay, were decayed by...
Resource Type:: Masters Thesis
Full Text:: FUTURE RESEARCH BIBLIOGRAPHY APPENDICES Appendix A Appendix B Appendix C Appendix D Appendix E

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

Creator:: Johnson, Donna A.
Abstract:: The purpose of this study was to determine if amount and kind of thinning had an effect on wood specific gravity, modulus of rupture, modulus of elasticity, growth rate, or pulp yield and kappa number. The study involved 24 1/5-acre plots, three plots in each of eight thinning treatments. The...
Resource Type:: Masters Thesis
Full Text:: receiving an income during the rotation of the stand (22, 24). Much research has been done on the effects

The economic feasibility of preheating Douglas-fir blocks prior to peeling

Creator:: Baskin, Richard
Abstract:: Past research and industrial sources have implied that preheating Douglas-fir Pseudotsuga menziesii (Mirb.) Franco prior to peeling veneer was economically feasible. To test this, the effect of treatment temperature on veneer yield and thickness variation for three diameter classes of low grade Douglas-fir logs was studied and related to the...
Resource Type:: Masters Thesis
Full Text:: Preheating Douglas-fir Blocks Prior to Peelin Abstract approved: Helmuth Resch Past research and

Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir

Creator:: Bodner, Josef
Abstract:: The purpose of this study was to determine if thinning, fertilization or a combination of thinning and fertilization had an effect on overall average specific gravity, modulus of elasticity, modulus of rupture, fiber length and intra-ring characteristics. Material for this experiment consisted of 7 trees randomly selected from each of...
Resource Type:: Masters Thesis
Full Text:: of this research. I would like to express special appreciation to my friend Johan Forrer

Nutrient cycling under 450-year-old Douglas-fir stands

Creator:: Abee, Albert
Abstract:: To investigate the movement of elements (N, P, k, Ca, and Mg) from the tree crowns by natural litterfall and leave wash, plots were established on six 450 year-old growth stands at the H. J. Andrews Experimental Forest. The following are the results of the data analyses. Elemental concentrations contained...
Resource Type:: Masters Thesis
Full Text:: )..comp.iled a.. review. 'of-his own research and the general Lf.teranur.e..on .leaching of substances from

The loading of second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco): to simulate the forces acting on an intermediate support tree

Creator:: Sedlak, Jerome Peter
Abstract:: The comercial thinning of second-growth stands in the Pacific Northwest is becoming increasingly important for satisfying the demand for timber. Cable logging will require the rigging of smaller intermediate support trees rather than those utilized on old-growth timber sales. This paper reports on the results of a study designed to...
Resource Type:: Capstone Project

Swinging and processing whole tree, tree length, and log length pieces in a Douglas-fir thinning

Creator:: Burrows, James O.
Abstract:: This paper describes a study done on swinging and processing whole tree, tree length and log length pieces in a smallwood Douglas-fir thinning. Two machines were evaluated, a 70 horsepower rubber tired skidder and a hydraulic loader mounted on a 6 x 4 live tandem truck. The study took place...
Resource Type:: Capstone Project

ScholarsArchive@OSU

Pulping qualities of refractory vs. permeable douglas-fir heartwood

Survival of planted Douglas-fir seedlings on severe sites using the paper sheet mulch planting method

A review of the present methods of measuring stand density and a presentation of new research on the application of Crown Competition Factor to Douglas-fir

Evaluating radial compression, color indicator and micro-toughness tests to detect early decay in Douglas-fir

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

The economic feasibility of preheating Douglas-fir blocks prior to peeling

Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir

Nutrient cycling under 450-year-old Douglas-fir stands

The loading of second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco): to simulate the forces acting on an intermediate support tree

Swinging and processing whole tree, tree length, and log length pieces in a Douglas-fir thinning

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