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Filtering by: Advisor Larson, Larry Decade 1990-1999

Cardaria draba (L.) Desv. in the sagebrush ecosystem of northeastern Oregon

Creator:

Smergut, Teresa A.

Abstract:

Ranchers and resource managers have become concerned about the role and spread of Cardaria draba (L.) Desv. (whitetop) in the sagebrush steppe of Northeastern Oregon. This area is an important natural resource for livestock production and big game winter range. An area near Keating, Oregon was selected to study the...

Resource Type:

Masters Thesis

Full Text:

understanding during the development of the thesis. Also special thanks is extended to Dr. Larry Larson for his
Comparative seedling growth of diffuse knapweed and bluebunch wheatgrass under altered moisture and temperature regimes

Creator:

Grammon, Arnold A.

Abstract:

In many areas of the Western U.S., diffuse knapweed (Centaurea diffusa Lam.) has invaded into plant communities dominated by bluebunch wheatgrass (Pseudomegnaria spicata [Pursh] A. Love). The objectives of this study were to compare growth response of both species when grown under altered moisture and temperature regimes while in the...

Resource Type:

Masters Thesis

Full Text:

Temperature Regimes. Abstract approved: Larry L. Larson In many areas of the Western U.S diffuse
Life-history, growth and interference of cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.)

Creator:

Sheley, Roger Leslie

Abstract:

Cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea soistitialis L.) have invaded over 3 million ha of grasslands in the western U.S. Future management will require an understanding of the conditions, mechanisms, and processes which control species dominance, community dynamics, and desirable plant establishment in these alien dominated annual rangelands....

Resource Type:

Dissertation