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Filtering by: Advisor Hermann, Richard K. Degree Field Forest Science Rights Statement Copyright Not Evaluated

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
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
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