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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:: AN ABSTRACT OF THE THESIS OF LE ROY CURTIS JOHNSON for the M. 5

Chemical suppression of a perennial ryegrass (Lolium perenne) living mulch and influence of ground cover management on growth of 'Chardonnay' wine grapes (Vitis vinifera) and Douglas fir Christmas trees (Pseudotsuga menziesii)

Creator:: Brenner, Loretta K.
Resource Type:: Masters Thesis
Full Text:: roots) to extension roots (longer, permanent roots) (13). Grasses can reduce permanent root length of

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

Creator:: Krahmer, Robert Lee
Resource Type:: Masters Thesis
Full Text:: . Burr, A. K. and A. 3. $tamm. Diffusion in wood. Journal of Physical Chemistry 51:240-261. Jan. 1947

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:: In 1971 (52), ornamental research and extension representatives met with the leaders of Oregon's

The flavonoid compounds of three floral phenotypes of Douglas fir

Creator:: Highley, Terry L.
Resource Type:: Masters Thesis
Full Text:: ) (Major) Date thesis is presented January j9j Title THE FLAVONOID COMPOUNDS OF THREE FLORAL Abstract

Drying rates of Douglas fir veneer in superheated steam

Creator:: Atherton, George H. (George Harry), 1920-1987
Resource Type:: Masters Thesis
Full Text:: by wood. Australian Journal of Applied Science 7:160-175. 1956. 15. Krahrner, R. L. Calorimetric

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:: Douglas-fir. Forest Pro- ducts Journal 12:213-217. 1962. Jayne, B. A. Some mechanical properties of wood

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:: (MIRB.) FRANCO) Abstract approved AN ABSTRACT OF THE THESIS OF

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:: AN ABSTRACT OF THE THESIS OF Donna A. Johnson for the degree of

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:: AN ABSTRACT OF THE THESIS OF Josef Bodner for the degree of

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

Chemical suppression of a perennial ryegrass (Lolium perenne) living mulch and influence of ground cover management on growth of 'Chardonnay' wine grapes (Vitis vinifera) and Douglas fir Christmas trees (Pseudotsuga menziesii)

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

Water relations and the root regeneration response of Douglas-fir

The flavonoid compounds of three floral phenotypes of Douglas fir

Drying rates of Douglas fir veneer in superheated steam

A study of several anatomical variables in relation to their effect on tensile strength 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)

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

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

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