Index Catalog // ScholarsArchive@OSU

Creator:: Evenden, Angela G.
Abstract:: This research evaluated the germination and early seedling development response of two sources of bluebunch wheatgrass (Agropyron spicatum) to a wide range of environmental conditions. Seeds collected near John Day, Oregon and Secar seed obtained from the Soil Conservation Service were used in the investigations. Evaluation of the germination response...
Resource Type:: Masters Thesis
Full Text:: when I was unable to be there. In addition, thanks go to Milda Vaitkus, Carolyn Bohn, Karen Holdsworth

Creator:: O'Connor, Casey A.
Abstract:: On piñon-juniper encroached sites that lack the understory fuels to carry a prescribed fire, treatment options are limited to mechanical methods. Cutting with chainsaws and leaving the trees on site has been the primary treatment method for such sites, however this method creates a potential fire hazard, particularly in the...
Resource Type:: Masters Thesis
Full Text:: juniper (Vaitkus and Eddleman 1987, Bates et al. 1998, Bates et al. 2000, Eddleman 2002, Bates et al

Creator:: Bates, Jonathan D.
Abstract:: Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
Resource Type:: Dissertation
Full Text:: Profess r, representing Rangeland Resources orCo Major PrIss, r presenting Rangeland Resources Head of

Creator:: Riegel, Gregg M.
Abstract:: The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
Resource Type:: Dissertation
Full Text:: program. Sincere appreciation is extended to Jeff Rose, Milda Vaitkus, Dr. Dennis Sheehy, and Chris

Creator:: Johnson, Dustin D.
Abstract:: Since European American settlement of the Intermountain Region, dramatic changes in vegetation composition and structure have occurred in the sagebrush steppe ecosystem. Western juniper (Juniperus occidentalis spp. occidentalis Vasek), although indigenous to the Intermountain Region, has increased since the late 1800s. Considerable work has been done documenting juniper woodland expansion...
Resource Type:: Masters Thesis
Full Text:: density increases, herbaceous and shrub biomass declines (Clary and Jameson 1981, Doughty 1987, Vaitkus

ScholarsArchive@OSU