Index Catalog // ScholarsArchive@OSU

Effect of light quality and periodicity upon germination of Douglas-fir seed (Pseudotsuga menziesii (Mirb.) Franco) and on growth of Douglas-fir seedlings

Creator:: Johnson, Le Roy Curtis
Abstract:: A study on the effects of light quality and periodicity on the germination of Douglas-fir seed and the growth of Douglas-fir seedlings was conducted. Interest was focused on responses that could be measured and observed without biochemical assay. It was found that .Douglas-fir seed,s would respond to red-light treatments by...
Resource Type:: Masters Thesis
Full Text:: partial fulfillment of the requirements for the degree of MASTER OF SCIENCE June 1965 APPROVED

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Creator:: Phillips, Michael John
Abstract:: To obtain data on the decomposition of the forest floor, a battery operated electrolytic respirometer was developed making it possible to measure CO₂ evolution from field moist forest floor samples in situ independent of root respiration. Banks of four respirometers powered by two 12-volt batteries were installed in three old...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Soil Science presented on December 4, 1975 Title: COMPARATIVE RATES OF

Some anatomical features of Douglas-fir wood rated permeable and refractory

Creator:: Krahmer, Robert Lee
Resource Type:: Masters Thesis
Full Text:: STATE COLLEGE in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE June

The flavonoid compounds of three floral phenotypes of Douglas fir

Creator:: Highley, Terry L.
Resource Type:: Masters Thesis
Full Text:: fulfillment of the requirements for the degree of MASTER OF SCIENCE June 1964 APPROVED: Professor of

A study of several anatomical variables in relation to their effect on tensile strength of Douglas-fir

Creator:: McMinimy, Lawrence Otto
Abstract:: A microscopic study was conducted on specific gravity wafers taken from standard tensile strength specimens of young growth Douglas-fir. Samples were studied to determine the effect of variables such as percent summerwood, fiber length and fibril angle on tensile strength of Douglas-fir. The sample specimens were picked so effects of...
Resource Type:: Masters Thesis
Full Text:: of MASTER OF SCIENCE Jw 1961j. Head o Department ofFrest Produot8 Chairman Schoo3 Graduate

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:: Master of Science in Forest Products presented on October 15, 1981 Title: The Effect of Forest Stand

The effect of drought on the rate of photosynthesis, respiration, and transpiration in two ecotypes of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Zavitkovski, J.
Abstract:: The subject of this study was the determination of the changes in photosynthesis, respiration and transpiration in two ecotypes of Douglas-fir as caused by decreasing soil moisture content. The photosynthetic rate was also correlated with the relative turgidities of needles. All the above processes were greatly affected by decreasing soil...
Resource Type:: Masters Thesis
Full Text:: fulfillment of the requirements for the degree of MASTER OF SCIENCE June 1964 TABLE OF CONTENTS EFFECT

Hydrogenation of Douglas Fir Pseudotsuga taxifolia, Britt., Wax

Creator:: Cho, Arthur Kenji
Resource Type:: Masters Thesis
Full Text:: deEree of MASTER OF SCIENCE June 1954 AP1OVED: -rofessor of Chemistry Professor of Wood

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:: Master of Science in Forest Products presented on June 13, 1983 Title: Effect of Thinning and

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:: OF THE THESIS OF for the degree of Master of Science presented on October 1, 1981 Title

ScholarsArchive@OSU

Effect of light quality and periodicity upon germination of Douglas-fir seed (Pseudotsuga menziesii (Mirb.) Franco) and on growth of Douglas-fir seedlings

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Some anatomical features of Douglas-fir wood rated permeable and refractory

The flavonoid compounds of three floral phenotypes of Douglas fir

A study of several anatomical variables in relation to their effect on tensile strength of Douglas-fir

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

The effect of drought on the rate of photosynthesis, respiration, and transpiration in two ecotypes of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Hydrogenation of Douglas Fir Pseudotsuga taxifolia, Britt., Wax

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

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

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