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Filtering by: Subject Douglas fir -- Oregon -- Willamette River Valley

Use of oak woodlands (Quercus garryana) for farm forestry and grazing in the Willamette Valley

Creator:

Hall, Frederick C.

Resource Type:

Masters Thesis
Development of tree height and diameter growth equations for mid-Willamette Valley Douglas-fir

Creator:

Ritchie, Martin W.

Abstract:

Equations for predicting height growth, basal area growth and diameter inside bark are presented for Douglas-fir. Basal area growth equations for grand fir are also presented. The growth models were developed for use in an individual tree/distance independent growth simulator. Various model forms and measures of competitive stress were compared...

Resource Type:

Masters Thesis
Cavity resources in Oregon white oak and Douglas-fir stands in the mid-Willamette Valley, Oregon

Creator:

Gumtow-Farrior, Daniel L.

Abstract:

Previous studies of bird communities in the mid-Willamette Valley, Oregon, indicated that Oregon white oak (Ouercus garryana) stands supported more cavity-using bird species than sympatric stands of Douglas-fir (Pseudotsuga menziesii). Mature Oregon oak stands are being harvested and few are regenerating. I compared cavity availability for hole-using fauna among 10...

Resource Type:

Masters Thesis