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Root regeneration potential in Douglas fir and Western hemlock seedlings : the role of environmental factors and current photosynthesis /Thompson, Barbara Ellen. January 1979 (has links)
Thesis (M.S.)--Oregon State University, 1980. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
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The valuation and use of site information for Douglas-fir reforestation in Western Oregon : a decision analysis /Schöne, Dieter Hans-Friedrich. January 1982 (has links)
Thesis (Ph. D.)--Oregon State University, 1983. / Typescript (photocopy). Includes bibliographical references (leaves 202-218). Also available on the World Wide Web.
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Energy exchange of transplanted Douglas-fir seedings on two cutover sites in southwestern Oregon /Vanderwaal, James A. January 1982 (has links)
Thesis (M.S.)--Oregon State University, 1983. / Typescript (photocopy). Includes bibliographical references (leaves 58-62). Also available on the World Wide Web.
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The resistance of Douglas-fir to sulfite pulpingHoge, William Henry 01 January 1954 (has links)
No description available.
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Physiological impacts of Swiss needle cast on Douglas-fir /Manter, Daniel K. January 2000 (has links)
Thesis (Ph. D.)--Oregon State University, 2001. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
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Structure and hydraulic function of xylem in two tree species with contrasting amounts of sapwood, Pseudotsuga menziesii and Pinus ponderosa /Domec, Jean-Christophe. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2002. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
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A study of the benzene-ether extract of woodsLounsbery, Marian Saly, 1924- January 1948 (has links)
No description available.
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Assessment of two spectral reflectance techniques for the estimation of fuel moisture content, equivalent water thickness, and specific leaf weight in Douglas-fir (Pseudotsuga menziesii (Mirb) Franco) needlesVisintini, Fabio 09 June 2011 (has links)
In the wildfire community fuel moisture content (FMC) is the quantity of choice when
it comes to assess vegetation water status in relation to fire risk and fire behaviour. Field
measurements of FMC are both expensive and time consuming and, in addition, sampling
is often spatially inadequate. Remote sensing could represent an almost ideal solution
both in terms of spatial and temporal coverage, if a consistent relationship between FMC
and spectral reflectance could be established. A review of the literature suggests that it is
difficult to retrieve FMC for dense forest canopies with remote sensing platforms. This
study took a step back and explored the relationship between spectral reflectance and
vegetation water content at the leaf level, where several confounding factors present at
the canopy level are eliminated or controlled for. It also considered a conifer species,
because relatively little research has been produced on this topic for this type of
vegetation. The main goal was to establish if FMC can be derived directly from spectral
reflectance in the solar spectrum using two well known approaches, such as spectral
indices and continuum removal. It is also aimed at exploring if an alternative, indirect
way to measure FMC as ratio of Equivalent Water Thickness (EWT) and Specific Leaf
Weight (SLW) is feasible and accurate. The results derived from Douglas-fir
(Pseudotsuga menziesii (Mirb) Franco) needles used in this study suggested that FMC
was not directly retrievable from spectral reflectance but vegetation water content could
be assessed with sufficient accuracy in terms of EWT. Also the retrieval of SLW from
reflectance of fresh foliage proved to be challenging. Finally, the study also highlighted
several aspects in the relationships among foliar water content, dry matter content and
reflectance that require additional research. / Graduate
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Detection, identification and control of Poria carbonica and other fungi in Douglas fir polesRicard, Jacques Louis 10 May 1966 (has links)
Graduation date: 1966
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Growth responses of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) to defoliationOsman, Khalid Amir 12 December 1991 (has links)
The effect of defoliation intensity and season on Douglas-fir growth
were studied in three replications in the Siuslaw National Forest during
1988-1990. Four intensities of defoliation were applied once in either spring or
summer 1988. Stem diameter and canopy area were linearly inversely
proportional to the level of defoliation. Defoliation intensity did not affect
height growth (P > 0.05). Greater losses in height occurred when seedlings
were defoliated in spring than in summer.
No differences in predawn and mid-day xylem water potential were
observed between trees defoliated in summer or spring 1988. However, in
1989, 25% defoliation reduced mid-day moisture stress whereas 50 and 75%
defoliation increased mid-day moisture stress (P < 0.05).
Effects of defoliation on length, width, and area of dominant and
subdominant twigs as well as number of twigs were separated into different
whorls. As indicated by the sharp slopes of the response surfaces, spring
defoliation affected seedlings more (P < 0.5) than summer defoliation. No
season or intensity effects (except second whorls) on area of dominant twigs
were carried over to 1990. No effects (P > 0.5) of season or intensity on twig
width were observed in 1990. Subdominant twigs were generally more sensitive
to defoliation than dominant twigs. Greater losses (P < 0.5) in area of
subdominant twigs occurred when seedlings were defoliated in spring than in
summer. Similar to area, length of twigs continued to respond to defoliation
intensity in 1990. Length and width of dominant and subdominant twigs were
smaller for spring compared to summer defoliated trees.
Number of twigs were linearly inversely proportional to the level of
defoliation intensity in 1989. Intensity did not affect number of twigs in 1990
except second whorls. No effect of defoliation intensity and season on new
whorls was detected. / Graduation date: 1992
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