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The long term effects of burning on plant succession

Creator:: Kraemer, James Fred
Abstract:: The succession of plants over a period of 25 years was analyzed on clearcut areas in the western Cascades of Washington and Oregon. Thirty-three paired burned and unburned plots were reexamined in 1975. Data were combined with records from prior examinations by Morris (1970). Cover trends of six major brush...
Resource Type:: Masters Thesis

Shear wave attenuation in unconsolidated laboratory sediments

Creator:: Brunson, Burlie A.
Abstract:: Shear wave attenuation measurements were made using ceramic bimorph transducers to excite transverse vibrations in a cylindrical column of unconsolidated sediment. Three different water-saturated sediments were used in an attempt to determine the effects of grain shape and sorting on the frequency dependence of attenuation. The mean grain size of...
Resource Type:: Dissertation
Full Text:: committee chairman, Dr. Richard K. Johnson. During the last two years, I have had the plea- sure

Root biomass studies of old-growth Douglas-fir

Creator:: Santantonio, Daniel
Abstract:: Root biomass studies were conducted in an old-growth stand of conifers in the western Cascades of Oregon. The root systems of three Douglas-firs (Pseudotsuga menziesii var. menziesii (Mirb. ) Franco) with diameters at breast height of 94, 110, and 135 cm were excavated and weighed to provide a basis for...
Resource Type:: Masters Thesis

Production and turnover of fine roots of mature Douglas-fir in relation to site

Creator:: Santantonio, Daniel
Abstract:: Fine roots are a dynamic component of Douglas-fir ecosystems. Changes in standing crops indicate that fine roots require a major portion of the stand's energy resources to fulfill their role in the functioning of these systems. We observed standing crops of live and dead fine (< 1 mm diameter) and...
Resource Type:: Dissertation

Ionic balance and the constituent organic acids of current-year foliage of western redcedar, western hemlock, and Douglas-fir seedlings

Creator:: Graff, Joseph Edward
Abstract:: Western redcedar, western hemlock, and Douglas-fir seedlings were transplanted into pots in one of two soils representative of high and low levels of available NO3 (and total N). The soils were collected from sites at Cascade Head (Oregon Coast) and Wind River (Washington Cascades). Whole plant and component relative dry...
Resource Type:: Dissertation

Freezing resistance of tissues in the twig of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Alden, John Norman
Abstract:: The relative freezing resistance of tissues in the stem, foliage and buds of terminal twigs from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was investigated at about ten-day intervals from summer until the following spring. Tissues from growing twigs collected before development of dormancy had no freezing resistance and were killed immediately...
Resource Type:: Dissertation

First year survival and growth of planting stock of various size on adverse sites

Creator:: Chetock, Jerome J.
Abstract:: First year survival of Douglas-fir seedlings outplanted in areas characterized by intense vegetative competition is heavily dependent on available soil moisture. To test this hypothesis, five distinct classes of Douglas-fir planting stock were planted on the south slope of McCulloch Peak in McDonald Forest in February of 1975. The stocking...
Resource Type:: Masters Thesis

Evaluation of the oscilloscope technique for detection of dormancy and survival potential of coniferous seedlings

Creator:: Askren, Catherine Anita
Abstract:: Oscilloscope display of modification of a square wave signal passed through stem tissue was evaluated as a means of detecting depth of dormancy and survival potential of coniferous seedlings. Trace form did not change during release from deep dormancy in Douglas fir. This release was judged by observing speed of...
Resource Type:: Masters Thesis

Ecology of curlleaf mountain-mahogany (Cercocarpus ledifolius Nutt.) in Eastern Oregon and adjacent areas

Creator:: Dealy, J. Edward
Abstract:: Cercocarpus ledifolius (curlleaf mountain- mahogany), a small, hardwood evergreen tree, was studied to provide information on germination and initial seedling growth characteristics, and the species' relationship to its environment.and associated vegetation. Exceptional germination for this species resulted from both a wet cold treatment at 4°C for 170 days (88 percent),...
Resource Type:: Dissertation

Design of an apparatus with controlled rates of temperature change for use in cold tolerance tests of conifers

Creator:: Wessell, William James
Abstract:: An apparatus was designed to permit freezing tests of needles and other tissue parts from coniferous trees under controlled rates of temperature change with time. The design is based on the principle of a balanced system of refrigeration demand and heat input to achieve a steady temperature state. The apparatus...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

The long term effects of burning on plant succession

Shear wave attenuation in unconsolidated laboratory sediments

Root biomass studies of old-growth Douglas-fir

Production and turnover of fine roots of mature Douglas-fir in relation to site

Ionic balance and the constituent organic acids of current-year foliage of western redcedar, western hemlock, and Douglas-fir seedlings

Freezing resistance of tissues in the twig of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

First year survival and growth of planting stock of various size on adverse sites

Evaluation of the oscilloscope technique for detection of dormancy and survival potential of coniferous seedlings

Ecology of curlleaf mountain-mahogany (Cercocarpus ledifolius Nutt.) in Eastern Oregon and adjacent areas

Design of an apparatus with controlled rates of temperature change for use in cold tolerance tests of conifers

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