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Filtering by: Committee Member Perry, Dave Committee Member Perry, Dave Subject Douglas fir -- Growth

Effects of seed characters and competitive environment on two-year performance of open-pollinated Douglas-fir families

Creator:

St. Clair, John Bradley

Abstract:

Ungerminated seed and recent germinants from 39 open-pollinated Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) families were planted in each of three competitive environments in order to determine the degree to which growth differences among families are influenced by competitive environment, seed weight, and date of emergence. The three competitive...

Resource Type:

Dissertation
Competitive interactions between Douglas-fir and red alder seedlings : growth analysis, resource use, and physiology

Creator:

Shainsky, Lauri J.

Abstract:

Competitive interactions between Douglas-fir seedlings (Pseudotsuga menziesii), and seedlings of a nitrogen-fixing hardwood associate, red alder (Alnus rubra), were investigated in an addition series experiment. The primary objective of the research was to identify and quantify key processes underlying intra- and interspecific competitive interactions of Douglas-fir and red alder seedlings....

Resource Type:

Dissertation