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Influences of shoot origin and certain pre- and post-severance treatments on the rooting and growth characteristics of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings

Creator:: Black, Darvil Kim
Resource Type:: Dissertation
Full Text:: CUTTINGS Abstract approved: W L/' r I V-.y w — w^j-<- A. N. Roberts Stem cuttings of

Influence of interplanted and pure stands of red alder (Alnus rubra Bong.) on microbial and chemical characteristics of a coastal forest soil in the Douglas-fir region

Creator:: Chen, Chi-sin
Abstract:: Chemical and microbial analyses were made at four seasonal intervals on soil horizons under red alder, conifers, and mixed alder-conifers at the Cascade Head Experimental Forest, established in 1937 by the U. S. Forest Service near Otis, Oregon. Microbial analyses showed that although plate counts of molds and bacteria fluctuated...
Resource Type:: Dissertation
Full Text:: STANDS OF RED ALDER (ALNUS RUBRA BONG.) ON MICROBIAL AND CHEMICAL CHARACTERISTICS OF A COASTAL FOREST

Douglas fir double grain lumber

Creator:: Ward, Vincent D.
Resource Type:: Undergraduate Thesis
Full Text:: f'oirnis - Í1n cr 1inînrs, - 1° A,it.c .raiier construction - 19 Offic, Föiise, and Store InterIoi

Time-dependent deflection of Douglas fir beams in bending and shear modes

Creator:: Capell, Harry Thomas
Abstract:: Creep in wood has been observed since 1833 but only recently has it been studied quantitatively. The aim of this paper is to study the time-dependent deflections of Douglas fir, Coast Region beams in bending and shear modes. The general method of approach used is that of large scale observation....
Resource Type:: Masters Thesis
Full Text:: = 21 (c2 -y2) h = 2c Making these substitutions one obtains Y N. A. A(',QM22 A v2 2 dAdx

Geographic and seasonal variation in photosynthetic efficiency and capacity of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Creator:: Pope, Walter William
Abstract:: Net photosynthesis was measured for photosynthetic light efficiency and capacity on two-year-old plants from eight different seed sources in three measurement periods. The measurement periods corresponded to the physiological periods 1) prior to bud swelling, 2) after needle elongation, and 3) predormancy. Measurement period differences in both photosynthetic efficiency and...
Resource Type:: Dissertation
Full Text:: seedlings from the northern Rocky Mountain seed sources had a greater light efficiency than those from

Characterization of lignocellulose decomposition in stream wood samples using ¹⁴C and ¹⁵N techniques

Creator:: Aumen, Nicholas G.
Resource Type:: Dissertation
Full Text:: approved: Redacted for Privacy Peter J. Bottomley A study was conducted on the distribution and

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:: . Platings of the diluted rinse water from the immature seed (Table 2B and 2C) yielded a preponderance of

Forest structure and regeneration in the Tsuga heterophylla - Abies amabilis transition zone, central Western Cascades, Oregon

Creator:: Stewart, Glenn H.
Abstract:: The dynamics of stands in the mid-elevation old-growth Douglas-fir (Pseudotsuga menziesii) forests of the central western Oregon Cascade Range were investigated using stand structure analysis. Trees with different growth rates were commonly present in the same stand, which resulted often in a weak correlation between tree diameter and age. Thus,...
Resource Type:: Dissertation
Full Text:: -classes and a few scattered, large individuals (Fig. 2c). There are few saplings but some seedlings

Factors affecting inter-tree root contact and the transmission of Phellinus weirii in young-growth Douglas-fir

Creator:: Reynolds, Keith M.
Abstract:: Groups of second-growth Douglas-fir (Mirb.) Franco were excavated in plots of two to six trees on two sites in the vicinity of Cowichan Lake, Vancouver Is., British Columbia. Eleven excavation plots provided 36 trees which could be studied in pairs (a total of 50 pairs) in order to ascertain the...
Resource Type:: Masters Thesis
Full Text:: provided 36 trees which could be studied in pairs (a total of 50 pairs) in order to ascertain the

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:: D. McKimmy The purpose of this study was to determine if thinning, fer- tilization or a

ScholarsArchive@OSU

Influences of shoot origin and certain pre- and post-severance treatments on the rooting and growth characteristics of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings

Influence of interplanted and pure stands of red alder (Alnus rubra Bong.) on microbial and chemical characteristics of a coastal forest soil in the Douglas-fir region

Douglas fir double grain lumber

Time-dependent deflection of Douglas fir beams in bending and shear modes

Geographic and seasonal variation in photosynthetic efficiency and capacity of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Characterization of lignocellulose decomposition in stream wood samples using ¹⁴C and ¹⁵N techniques

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

Forest structure and regeneration in the Tsuga heterophylla - Abies amabilis transition zone, central Western Cascades, Oregon

Factors affecting inter-tree root contact and the transmission of Phellinus weirii in young-growth Douglas-fir

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

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