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Filtering by: Alternative title ssim Frequencies of daily precipitation amounts at Eugene, Oregon Remove constraint Alternative title ssim: Frequencies of daily precipitation amounts at Eugene, Oregon Degree Field Soil Science Remove constraint Degree Field: Soil Science Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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  • Archaeological Investigations at the Seal Rock Site, 35LNC14 : A Late Prehistoric Shell Midden Located on the Central Oregon Coast

    Creator:
    Clark, Linda Ann
    Abstract:
    Seal Rock (35LNC14) is a late prehistoric shell midden site located on the central Oregon coast. Information derived from the faunal remains, radiocarbon dates, and location and size of the midden deposits suggest the site represents a late littoral stage of cultural adaptation. Analyses of lithic artifacts, and bone and...
    Resource Type:
    Masters Thesis
    Full Text:
    chairman of my committee for my first year at Oregon State Univeristy. Dr. Lyman not only shared

  • Analysis of variability of some forest soils in southwestern Oregon

    Creator:
    Wicherski, Bruce P.
    Abstract:
    The variability of selected physical, chemical, and morphological soil properties in two landtype mapping units on'the Rogue River National Forest in southwestern Oregon was studied. The objectives of the study were (i) to quantify soil variability in several soil resource inventory mapping units, (ii) to explore methods of describing soil...
    Resource Type:
    Masters Thesis
    Full Text:
    . Frequency distributions are laborious to develop and take up large amounts of space in their presentation

  • Suitability of diverse composts as soil amendments for highbush blueberry (Vaccinium corymbosum L.)

    Creator:
    Costello, Ryan C.
    Abstract:
    Highbush blueberry (Vaccinium corymbosum L.) is adapted to soils with high organic matter and acidic pH. Composts provide organic matter and nutrients for growing blueberry in mineral soils, but many composts are high in pH and soluble salts. Acidification with elemental sulfur (S°) can remedy high pH, but the process...
    Resource Type:
    Masters Thesis
    Full Text:
    were not correlated with compost N supply. Composts with greater amounts of plant-based feedstocks

  • Soil variability on steep, skeletal forested slopes of the Umpqua National Forest, Oregon

    Creator:
    Myhrum, Ronald P.
    Abstract:
    This study was undertaken to determine both the amount and the spatial variability of sand, silt, clay, and six fractions of coarse fragments in soils representing harsh sites for reforestation. Particle size data were collected because of their direct relationship to water holding capacity and the plantability and survivability of...
    Resource Type:
    Masters Thesis
    Full Text:
    substantial amounts of energy to warm up. Childs ( 1981 ) found that, for five southwest Oregon forest soils

  • An Analysis of Nutrient Depletion in Douglas-fir Forests of the Oregon Coast Range

    Creator:
    Siah, Kaveh G.
    Abstract:
    Nutrient limitation constrains tree growth in many managed forests. Nitrogen (N) is the most common limiting nutrient, but high N supply can shift limitation to other nutrients, particularly phosphorus (P) and the base cations calcium (Ca), magnesium (Mg), and potassium (K). As different soil minerals have different capacities to supply...
    Resource Type:
    Masters Thesis
    Full Text:
    August 24, 2021. Title: An Analysis of Nutrient Depletion in Douglas-fir Forests of the Oregon

  • An edaphic study of the Mt. Pisgah Arboretum water garden, Coast Fork of the Willamette River

    Creator:
    Bergen, Cameron Francis
    Abstract:
    Wetlands are widely identified as providing important and fundamental processes valuable for maintaining ecosystem health and diversity. Located in the southern Willamette Valley, the Mt. Pisgah Arboretum contains some valuable remaining wetland habitat along the Coast Fork of the Willamette River. One goal of the Mt. Pisgah Arboretum is "to...
    Resource Type:
    Masters Thesis
    Full Text:
    ......................................................................................... 39 12 Weekly river levels and precipitation amounts over the course of the 38- week study period

  • The effects of the Mazama tephra-falls : a geoarchaeological approach

    Creator:
    Matz, Stephan E.
    Abstract:
    About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The...
    Resource Type:
    Masters Thesis
    Full Text:
    , a stratovolcano, which stood at the present site of Crater Lake in southwestern Oregon (Figure 1

  • Genesis of some soils in the central western Cascades of Oregon

    Creator:
    Brown, R. B.
    Abstract:
    Soils representative of several landscape units in the H. J. Andrews Experimental Forest, Western Cascade Range, were sampled, analyzed, and tentatively classified. Genetic inferences were drawn relating soils to landscape position and other factors of soil formation. Descriptive information and nutrient capital data were provided to support ecosystem modelling efforts...
    Resource Type:
    Masters Thesis
    Full Text:
    ). Rain is the dominant form of precipitation at lower elevations, but considerable snowpack develops on

  • Comparative study of some soil characteristics of grassland and forest/grassland transition in western Oregon

    Creator:
    Ezenwa, Matthew Ikechuku Sunday
    Abstract:
    Vegetation as a soil-forming factor was studied under forest transition and grass while attempting to keep other soil forming factors constant in the western part of the Willamette Valley, Oregon. The physiographic units consist chiefly of the interior foothills and slopes formed from an old basaltic flow with some interspersed...
    Resource Type:
    Masters Thesis
    Full Text:
    and forest/grassland transition in western Oregon AN ABSTRACT OF THE THESIS OF Matthew Ikechuku

  • The mineralogy and morphology of loess derived soils along a traverse in northeastern Oregon

    Creator:
    Berggren, Brad J.
    Abstract:
    The lentil strain of pea seedborne mosaic virus, PSbMV-L, was distinguished from the standard isolates of PSbMV by a natural inoculum reservoir in lentil seed and by separate resistance genes in Pisum and Lens. PSbMV-L was intermediate in symptom severity between the standard and New Zealand isolates of PSbMV. Seed...
    Resource Type:
    Masters Thesis
    Full Text:
    of PSbMV-L RNA was estimated at 3.5 million. DNA complementary to PSbMV-C4 RNA was prepared using