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Detecting early decay and estimating residual strength of Douglas-fir heartwood by infrared and ultraviolet spectrophotometry

Creator:: Gibson, David G. (David Glenn), 1958-
Resource Type:: Masters Thesis
Full Text:: : Detecting Early Decay and Estimating Residual Strength of Douglas-fir Heartwood by Infrared and

Botrytis infection of Douglas-fir seedlings and its control with thiram

Creator:: Halber, Max
Resource Type:: Masters Thesis
Full Text:: Botrytis Infection of Douglas-Fir Seedlings and Its

Root initiation and differentiation in Pseudotsuga menziesii (Mirbel) Franco

Creator:: Bogar, Gerald Dale
Abstract:: Tissue differentiation of the primary root and its associated laterals is reported. Secretory elements are the first of the primary tissues to mature. They appear to be located between the precursory phloem and pericycle in the primary root, but are more closely associated with the pericycle in long lateral roots....
Resource Type:: Masters Thesis
Full Text:: ) FRANCO INTRODUCTION The anatomy of Douglas -fir (Pseudotsuga menziesii (Mirb. ) Franco) has been

Fungi associated with Douglas-fir seed during cone development, seed processing, and storage

Creator:: Gordon, Lewin Roland
Abstract:: The Pacific Coast form of Douglas-fir in natural forest succession is an intermediate species thriving in the Coast Range and Cascade Mountains of the Pacific Northwest. This species constitutes 26 percent of the standing timber in the United States, and 24 percent of the nation's annual timber harvest. Characteristics of...
Resource Type:: Masters Thesis
Full Text:: and Shea (43, p. 1) attempted to reduce deterioration of the seed by treatment of Douglas -fir cones

Cambial divisions in Pseudotsuga menziesii

Creator:: Sisson, Warren Elmer, Jr.
Abstract:: Mitotic activity in the vascular cambium was determined from ten samples from a single internode in each of four Douglas-fir [(Pseudotsuga menziesii (Franco.) Mirb.)]trees. Counts of interphase and mitotic nuclei from nine cores in each sample piece were averaged and expressed as the frequency and mitotic index. The sampling error...
Resource Type:: Masters Thesis
Full Text:: Douglas -fir [(Pseudotsuga menziesii (Franco. ) Mirb. )]trees. Counts of inter - phase and mitotic

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:: CO2 PRODUCTION FROM THE FOREST FLOOR IN THE DOUGLAS-FIR ECOSYSTEM Redacted for Privacy ChesterA

Water relations and the root regeneration response of Douglas-fir

Creator:: Cobb, Cheryl Anne
Abstract:: The effect of lifting date and root-pruning treatments on water potential, root regeneration, and shoot growth of six-month-old and three-year-old Douglas-fir seedlings bare-root transplanted into a growth chamber, and sawdust bed, respectively, was studied. Root growth in six-month-old and three-year-old seedlings was highest in February and August respectively. Survival was...
Resource Type:: Masters Thesis
Full Text:: THE ROOT REGENERATION RESPONSE OF DOUGLAS-FIR Abstract approved^ Leslie H. Fuchigami The

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

Creator:: Krahmer, Robert Lee
Resource Type:: Masters Thesis
Full Text:: within a species is known to exist. Douglas-fir (Psudotsuga menzjesjj. (Mirb.) Franco) heartwood samples

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:: VARIABLES IN RELATION TO THEIR EFFECT ON TENSILE STRENGTH OF DOUGLA Abstract approved A microscopic study

Direct seeding of Douglas fir with special reference to survival

Creator:: Finnis, John Michael
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Detecting early decay and estimating residual strength of Douglas-fir heartwood by infrared and ultraviolet spectrophotometry

Botrytis infection of Douglas-fir seedlings and its control with thiram

Root initiation and differentiation in Pseudotsuga menziesii (Mirbel) Franco

Fungi associated with Douglas-fir seed during cone development, seed processing, and storage

Cambial divisions in Pseudotsuga menziesii

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

Water relations and the root regeneration response of Douglas-fir

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

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

Direct seeding of Douglas fir with special reference to survival

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