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Filtering by: Subject Ponderosa pine Committee Member Tappeiner, John

The influence of antidesiccants on field performance and physiology of 2+0 ponderosa pine (Pinus ponderosa Dougl.) seedlings

Creator:

Vera-Castillo, J. A. Gil

Abstract:

This thesis research examines the effects of film-forming antidesiccants applied to dormant pondexosa pine (Pinus ponderosa Dougl.) seedlings after being lifted and to actively growing seedlings. The basic proposition was that antidesiccants would have a positive effect on reducing water loss in ponderosa pine seedlings. In order to evaluate the...

Resource Type:

Dissertation
Recruitment of ponderosa pine seedlings beneath partial overstories

Creator:

Keyes, Christopher R.

Abstract:

The objective of this project was to investigate the fate of ponderosa pine regeneration from seed to established seedling, and to determine the relative influences of several important stand elements on those fates. The project was carried out in a series of observational and experimental recruitment studies in central Oregon....

Resource Type:

Dissertation
Competitive interactions between Douglas-fir or ponderosa pine and whiteleaf manzanita

Creator:

White, Diane E.

Abstract:

Juvenile Douglas-fir, ponderosa pine, and whiteleaf manzanita growth in southwest Oregon varied with density of co-developing manzanita and presence of herbaceous cover. Plant xylem pressure potential and stomatal conductance of each species was responsive to competition-induced depletion of soil water. Rates varied among species. The best correlations with growth usually...

Resource Type:

Dissertation