Index Catalog // ScholarsArchive@OSU

Creator:: Running, Steven William
Abstract:: The resistance of a leaf to molecular gaseous diffusion is an important physiological response. Control of leaf resistance enables a plant to control its transpired water loss and regulates photosynthesis. Four study sites representing a gradient in available moisture and evaporative demand, were chosen in western Oregon for the study...
Resource Type:: Masters Thesis

Creator:: Reed, Kenneth Lee, 1942-
Abstract:: Four study sites were selected along an altitudinal gradient on Mt. Ashland in the Siskiyou Mountains of southern Oregon. The altitudinal gradient roughly corresponded to a gradient in temperature and water availability ranging from very hot and dry to cool and moist. Air and soil temperatures were continuously measured on...
Resource Type:: Dissertation

Creator:: Logan, Robert S. (Robert Steven), 1945-
Abstract:: Clearcutting is a sound silvicultural practice when exercised in the proper environmental location. Foresters have learned through bitter experience that clearcutting Douglas-fir forests, located on droughty south-facing slopes, often leaves uncorrectable regeneration problems. Thousands of acres of unproductive grass and brush throughout the Douglas-fir region are unavoidable reminders of inappropriate...
Resource Type:: Masters Thesis

Creator:: Emmingham, William H.
Abstract:: In a mountainous region of southwestern Oregon where temperature, moisture and nutritional status of forest communities have already been classified, the influence of tight upon conifer growth and plant distribution was investigated. Light, measured in calories cm day' (400-700 nm) during clear summer days was used as an index to...
Resource Type:: Masters Thesis

Creator:: Emmingham, William H.
Abstract:: When trees from 16 populations of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco. var. menziesii) were grown at ten geographically diverse locations for seven years, those from a Vancouver Island source were among the top three for height growth on nine of the ten plantations (Rowe and Ching, 1974). In contrast, growth...
Resource Type:: Dissertation

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