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Effect of western juniper on understory herbage production in Central Oregon

Creator:: Vaitkus, Milda R.
Abstract:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory production and composition. As trees increase in size and density, understory production is reduced and composition changes. This study was designed to identify the relationship between production and composition of understory vegetation and various tree canopy sizes of...
Resource Type:: Masters Thesis
Full Text:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory

Influence of leachates from western juniper slash on three native grasses

Creator:: Ramsey, Katherine J.
Abstract:: Paired 30-day trials were conducted to evaluate Agropyron spicatum germination when treated with two concentrations of throughfall leachates from western juniper slash in two stages of decomposition. Data from a second pair of 49-day greenhouse trials were analyzed to evaluate emergence and growth of Aqropyron spicatum, Oryzopsis hymenoides, and Poa...
Resource Type:: Masters Thesis

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Creator:: Rose, Jeffrey A.
Abstract:: This research assessed the effect of western juniper (Junlperus occldentalls) removal on understory plant production and cover and ponderosa pine (Pinus ponderosa) growth and plant water status. A complete randomized block design, with four blocks and four treatments was established in the summer of 1984 near Prineville, Oregon. The four...
Resource Type:: Masters Thesis
Full Text:: existing stands are increasing density. In central Oregon western juniper numbers were found to double

Correspondence of soil properties and classification units with sagebrush communities in southeastern Oregon

Creator:: Lentz, Rodrick David
Abstract:: This research employed multivariate analytical techniques to statistically examine the relationship between individual soillandscape units (SLUs) in Southeastern Oregon and their associated sagebrush communities. The objective was to determine if soil properties between SLUs differed, describe the variation, and verify that these differences were reflected in the taxonomic class of...
Resource Type:: Masters Thesis
Full Text:: with Sagebrush Communities in Southeastern Oregon AN ABSTRACT OF THE THESIS OF Rodrick D. Lentz for

Fire ecology and management in plant communities of Malheur National Wildlife Refuge, southeastern Oregon

Creator:: Young, Richard P.
Abstract:: This research assesses prescribed burning as a habitat management technique in wetlands and associated upland communities of Malheur National Wildlife Refuge, southeastern Oregon. Experimental burns were conducted to evaluate fire behavior and effects in wetland and upland habitats, and, fire effects on Cirsium arvense. Wetland plant communities were monotypic stands...
Resource Type:: Dissertation

Early survival and growth response of five species of Pinus to plant competition and aspect in southwest Oregon and northeast Mexico

Creator:: Capo-Arteaga, Miguel A.
Abstract:: The effect of forest shrub vegetation on soil moisture, temperatures evaporation potentials and the survivals growth and bud activity of five species of Pinus was studied on planting sites placed on opposite exposures on two locations in southwest Oregon and northeast Mexico. Treatments applied were: Manual slashing; Manual slashing plus...
Resource Type:: Dissertation

Effects of earthflows on stream channel and valley floor morphology western Cascade Range, Oregon

Creator:: Vest, Sarah B.
Abstract:: Slow moving earthflows (0.1 15 m/yr.) may constrict valley floors and directly impinge on stream channels. Earthflows that move laterally into channels deliver organic and inorganic material to the stream from the earthflow toe. If the amount and particle size of this material is too large to be removed by...
Resource Type:: Masters Thesis
Full Text:: morphology western Cascade Range, Oregon AN ABSTRACT OF THE THESIS OF Sarah B. Vest for the degree of

Description of the plant communities and succession of the Oregon coast grasslands

Creator:: Ripley, James Douglas
Abstract:: In an effort to describe the plant communities and succession of the Oregon coastal grasslands, vegetation and environmental data were collected from 75 stands at 24 separate locations ranging from Cape Falcon in Tillamook County to Cape Ferrelo in Curry County. The vegetation data consisted of cover and frequency values...
Resource Type:: Dissertation
Full Text:: Oregon coastal ecology. For this reason I undertook this study with a view towards describing the

Food habits and diet quality of deer and cattle and herbage production of a sagebrush-grassland range

Creator:: Hilken, Thomas O.
Abstract:: Research was conducted on the Keating rangelands in north-eastern Oregon to determine the food habits of deer and cattle and similarity of their diets, and to estimate deer and cattle months of grazing on both a quantitative and nutritional basis. Data were collected during the winters of 1978-1979, 1979-1980 and...
Resource Type:: Masters Thesis
Full Text:: - eastern Oregon to determine the food habits of deer and cattle and similarity of their diets, and to

Soil fungal hyphal dynamics and seasonal hypogeous sporocarp production in western Oregon Douglas-fir forests

Creator:: Hunt, Gary, 1945-
Abstract:: Total length and biomass of fungal mycelium in the soil of a young Douglas-fir stand in the central Oregon Coast Range were estimated over 27 months with the agar-film technique. In a second study, phenology and taxonomy of hypogeous (belowground) sporocarps were studied over 32 months in a nearby, young...
Resource Type:: Dissertation
Full Text:: Sporocarp Production in Western Oregon Douglas-Fir Forests AN ABSTRACT OF THE THESIS OF Gary Alan Hunt

ScholarsArchive@OSU

Effect of western juniper on understory herbage production in Central Oregon

Influence of leachates from western juniper slash on three native grasses

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Correspondence of soil properties and classification units with sagebrush communities in southeastern Oregon

Fire ecology and management in plant communities of Malheur National Wildlife Refuge, southeastern Oregon

Early survival and growth response of five species of Pinus to plant competition and aspect in southwest Oregon and northeast Mexico

Effects of earthflows on stream channel and valley floor morphology western Cascade Range, Oregon

Description of the plant communities and succession of the Oregon coast grasslands

Food habits and diet quality of deer and cattle and herbage production of a sagebrush-grassland range

Soil fungal hyphal dynamics and seasonal hypogeous sporocarp production in western Oregon Douglas-fir forests

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