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Filtering by: Creator Radloff, Cassidy N. Remove constraint Creator: Radloff, Cassidy N. Degree Field Soil Science Remove constraint Degree Field: Soil Science

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  • The effect of burrowing mammals on the hydrology of a drained riparian ecosystem

    Creator:
    Cassidy, James Richard
    Abstract:
    Many species of rodents and insectivores live in subterranean burrows in soils throughout the world. The soil surface perforations of burrow entrances are often connected to complex, subsurface tunnel networks. Burrow entrances and associated subsurface tunnel networks represent a link between surface and subsurface ecological function. Anecdotal observations of surface-water...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF James Richard Cassidy for the

  • Determining the Minimum Treatment Area and Importance of Soil Irrigation for Solarizing Soil Infested with Phytophthora spp.

    Creator:
    Bennett, Logan L.
    Abstract:
    Nurseries are an important part of the agriculture industry of the United States. The nursery industry provides ornamental, forest, restoration and specialty products to many markets in N. America. The disease sudden oak death, caused by Phytophthora ramorum, has devastating environmental and economic impacts on forested land, the urban-forest interface,...
    Resource Type:
    Masters Thesis
    Full Text:
    to many markets in N. America. The disease sudden oak death, caused by Phytophthora ramorum, has

  • The effect of physical and hydraulic properties of peat moss and pumice on Douglas-fir bark based soil-less substrates

    Creator:
    Zazirska Gabriel, Magdalena
    Abstract:
    Douglas-fir [Pseudotsuga menziesii (Mirbel) Franco] bark (DFB), sphagnum peat moss, and pumice are the most common substrate components used in the Oregon nursery industry. Despite the widespread use of these three components, little information is available on the effect of physical and hydraulic properties of peat moss and pumice on...
    Resource Type:
    Masters Thesis
    Full Text:
    pumice (n=3).................................................................................... 22

  • 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:
    large ranges in reported values for most properties. Exchangeable cations, organic matter, available N

  • Evaporation from bare soil and soil cracks: a numeric study

    Creator:
    Graham, Christopher Brian
    Abstract:
    Evaporation from bare soil was investigated using a numeric model In one set of simulations, texture and evaporative demand were analyzed as they impacted short and long term evaporation. The effect of these factors on water redistribution was also analyzed. A second set of simulations was run to determine the...
    Resource Type:
    Masters Thesis
    Full Text:
    permeability (above) and magnitude of van Genuchten parameter n (below). Figure 3: Soil Depth affected by

  • Spatial analysis of soil depth variability and pedogenesis along toposequences in the Troodos Mountains, Cyprus

    Creator:
    Robins, Colin R.
    Abstract:
    In unstable landscapes, modern pedological research explores the role of soils as products and indicators of geomorphologic change. Understanding the dynamics of hill slope pedogenesis is especially important in regions with limited, poor, or threatened soil resources. The island of Cyprus, situated in the eastern Mediterranean, is claimed by many...
    Resource Type:
    Masters Thesis
    Full Text:
    departmental dilemmas; to John Baham, James Cassidy, and Herb Huddleston for their love of knowledge and

  • Migration of E. coli and solutes to tile drains via preferential and matrix flow

    Creator:
    Moreno, Daniel
    Abstract:
    The extent of agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land applications of liquid manure on tile drain fields have the potential to transport solutes and bacteria to the drains following precipitation or irrigation events and many times are directly sent to a...
    Resource Type:
    Masters Thesis
    Full Text:
    Fernandez, for general guidance; Michael Rogers and James Cassidy, for the use of the magnetometor data and

  • Science Through the Lens of Art

    Creator:
    Garton, Elizabeth
    Abstract:
    There is a connection between science and art. This study is specifically looking at the connection between soil science, art, and biochemistry. The traditional display of research in the sciences is in a written form such as a manuscript or journal article. To challenge this traditional presentation of scientific knowledge...
    Resource Type:
    Masters Thesis
    Full Text:
    thanks to Nina Cassidy and Emerson Vineyards for allowing me access to photogenic locations and sample

  • Dilute Permanganate Preferentially Oxidizes Polyphenols Rather than Microbial Food: A Reinterpretation of a Common “Active Carbon” Measurement

    Creator:
    Christy, Isabel
    Abstract:
    “Active carbon” is a rapidly cycling soil organic carbon (SOC) fraction that acts as an energy and nutrient source for the microbial community. Dilute permanganate oxidation has been used to measure an “active carbon” fraction with the assumption that permanganate oxidation mimics enzymatic decomposition. Permanganate oxidizable carbon (PoxC) has become...
    Resource Type:
    Masters Thesis
    Full Text:
    with lab analyses. Thank you to James Cassidy for help with setting up the composting experiment

  • Sea-Salt Impacts On Nutrient Cycling In Oregon Coastal Soils

    Creator:
    Aleman, Ruben
    Abstract:
    Sea-salt aerosols (SSA) impact the cycling of nutrients within coastal soils, including the mobility of dissolved organic carbon (DOC) and ammonium, denitrification, and litter decomposition. These aerosols are formed during tumultuous weather in the open ocean and are transported and deposited inland by wind. Soils closer to the ocean are...
    Resource Type:
    Masters Thesis
    Full Text:
    department who have been friends and mentors to me including James Cassidy, Kim Townsend, Adam Lindsley