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Filtering by: Committee Member Powelson, R. L. Subject Douglas fir

The influence of seed source origin and phenological characteristics on wood quality in a young Douglas-Fir Provenance Plantation

Creator:

Robinson, Walter P.

Abstract:

The relationships of several wood quality traits with seed origin and phenological characteristics, measured at a young age, were tested from six seed sources in a young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) provenance plantation. The wood quality traits measured were wood density, uniformity of wood density, percentage latewood, fiber length,...

Resource Type:

Masters Thesis
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:

helping me develop and complete my academic and research programs included Drs. T. E. Bedell, R. L
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