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Filtering by: Committee Member Brooks, R. H. Subject Douglas fir

Silvicultural impacts of sheep grazing in Oregon's Coast Range

Creator:

Leininger, Wayne C.

Abstract:

A three-year investigation was conducted during 1980-1982 to evaluate the potential of using herded sheep as a silvicultural tool to suppress brush in Douglas-fir (Pseudotsuga menziesii) plantations of Oregon's Coast Range. Sheep browsing of Douglas-fir was highest in May soon after bud break. Averaged over the 2 years of grazing,...

Resource Type:

Dissertation

Full Text:

Oregon's Coast Range Abstract approved: Redacted for Privacy fteven H. Sharrow, Associate Professor A
Genetic variations in length of active growth period among races of Douglas fir, Pseudotsuga menziesii (Mirb.) Franco

Creator:

Irgens-Moller, Helge

Resource Type:

Dissertation

Full Text:

initial phases of the studies; to Dr. Frank H. Smith for valuable advice on the presentation of the data
The physiology of plagiotropic growth of rooted cuttings of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Creator:

Starbuck, Christopher J.

Abstract:

Experiments were conducted to determine if the plagiotropic growth habit of rooted cuttings of Douglas-fir might result from a system favoring the accumulation of indoleacetic acid in the adaxial side of the shoot in response to vertical placement. Actively growing excised branch terminals were subjected to gravitational disorientation to determine...

Resource Type:

Dissertation

Full Text:

members of my graduate committee: Drs. L. H. Fuchigami, P. J. Breen, W. S. McGuire, R. S. Quatrano