Search Constraints

Start Over
Filtering by: Subject Cydia -- Control -- Oregon Remove constraint Subject: Cydia -- Control -- Oregon Advisor Pyke, David A. Remove constraint Advisor: Pyke, David A.

Search Results

  • Control of Lepidium latifolium and restoration of native grasses

    Creator:
    Laws, Margaret S.
    Abstract:
    Lepidium latifolium L. (perennial pepperweed, LEPLA) is an exotic invader throughout western North America. At Malheur National Wildlife Refuge (MNWR) in southeast Oregon, it has invaded about 10% of meadow habitats that are important for wildlife. This study's objective was to determine the most effective and least environmentally harmful treatment...
    Resource Type:
    Masters Thesis
    Full Text:
    Wildlife Refuge, Oregon ......... 61 Effects of Pepperweed Control Treatments on Ground Cover (Percent

  • The effects of defoliation on Bromus tectorum seed production and growth

    Creator:
    Mayer, Kara Hempy
    Abstract:
    Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
    Resource Type:
    Masters Thesis
    Full Text:
    -dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation on

  • Sugar application and nitrogen pools in Wyoming big sagebrush communities and exotic annual grasslands

    Creator:
    Witwicki, Dana L.
    Abstract:
    Within A rtemisia tridentata ssp. wyomingensis Nutt. (Wyoming big sagebrush) communities of the Great Basin, lands dominated by the exotic annual grass Bromus tectorum L. (cheatgrass) are increasing at an alarming rate. Carbon applications, which reduce plant-available soil N, have been suggested as a way to give native vegetation a...
    Resource Type:
    Masters Thesis
    Full Text:
    pools in each of these communities. Research occurred at six sites in eastern Oregon and southwestern

  • Yield responses of invasive grasses to carbon doses

    Creator:
    Brunson, Jessi L.
    Abstract:
    The sagebrush steppe ecosystem of the northern Great Basin is severely degraded and continues to decline due in large part to the invasive, non-native annual grasses Bromus tectorum L. (cheatgrass) and Taeniatherum caput-medusae (L.) Nevski (medusahead). Restoration of invasive-dominated areas is difficult, but can be enhanced by adding a carbon...
    Resource Type:
    Masters Thesis
    Full Text:
    by Jessi L. Brunson A THESIS submitted to Oregon State University