Search Constraints

Start Over
Filtering by: Creator Jonko, Alexandra K. Remove constraint Creator: Jonko, Alexandra K. Decade 2000-2009 Remove constraint Decade: 2000-2009

Search Results

  • Cover crop effects on root rot of sweet corn and soil properties

    Creator:
    Miyazoe, Mikio
    Abstract:
    Root rot of sweet corn in western Oregon and Washington is a significant disease that can reduce yield of intolerant cultivars of processed sweet corn by fifty percent. Root rot is caused by a complex of soilborne organisms, including Drechslera sp., Phoma terrestris, and Pythium arrhenomanes. Processors have adopted tolerant...
    Resource Type:
    Masters Thesis
    Full Text:
    : _______________________________________________________________________ Alexandra G. Stone Root rot of sweet corn in western Oregon and Washington is a

  • Soil organic matter management and root health

    Creator:
    Darby, Heather
    Abstract:
    Annual applications of fresh or composted dairy manure were assessed for their effects on root rots of sweet corn and snap bean and damping-off of cucumber in a field soil. Soil biological and physical properties were measured as possible indicators of root rot suppressive potential. Regardless of amendment type or...
    Resource Type:
    Dissertation
    Full Text:
    Management and Root Health. Alexandra G. Stone Annual applications of fresh or composted dairy manure were

  • Serial manure amendments : effects on soil properties and root rot of sweet corn

    Creator:
    Cox, Bonnie S. Hoffman
    Abstract:
    The effect of serial (multiple-year) organic matter (OM) amendment on soil properties has been described in some cropping systems, although less is known about the effect of serially amended field soils on soil-borne plant diseases. The objectives of this study were to describe the effects of the third and fourth...
    Resource Type:
    Masters Thesis
    Full Text:
    : Effects on Soil Properties and Root Rot of Sweet Corn. Abstract aPP Alexandra G. Stone The effect of

  • Estimating the dry matter production, nitrogen requirements, and yield of organic farm-grown potatoes

    Creator:
    McQueen, John Paul Gainer
    Abstract:
    As part of a participatory research project, where farmers and Oregon State University researchers collaborated, aspects of potato (Solanum tuberosum L.) growing systems were studied. It was determined through conversations with the farmers that quantification of certain growth parameters of potato was lacking, including dry matter accumulation, crop nitrogen (N)...
    Resource Type:
    Masters Thesis
    Full Text:
    . Usually in these plots, P and K are added to assume no other plant growth limitations. In Canada

  • Biosynthesis, production and structural studies of secondary metabolites in cultured marine cyanobacteria

    Creator:
    Vulpanovici, Florina Alexandra
    Abstract:
    This thesis details investigations of marine cyanobacterial secondary metabolism, with emphasis on a strain of Phormidium sp. collected in Indonesia. These studies assessed the effects of nineteen putative elicitor compounds on the growth and metabolite production of five species of marine cyanobacteria, biosynthetic investigation of an intriguing secondary metabolite, phormidolide,...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE THESIS OF Florina Alexandra Vulpanovici for

  • Mental and biophysical terrains of biodiversity : conservation of oak woodland on family forest

    Creator:
    Fischer, Alexandra Paige
    Abstract:
    This research analyzes how family forest owners conceptualize biodiversity in one high-conservation value area of oak woodland in the Willamette Valley of Western Oregon. Oregon white oak (Quercus garyanna) woodland, one of the most biologically diverse ecotypes in the state of Oregon, is in decline. Much of the oak ecotype...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Alexandra Paige Fischer for

  • Private forests, public policy : oak conservation on family forests in Oregon’s Willamette Valley

    Creator:
    Fischer, Alexandra Paige
    Abstract:
    In the United States, many of the thorniest natural resource conflicts occur on private lands. This is especially true in the Willamette Valley of Western Oregon where the hallmark habitat type, Oregon white oak woodland and savanna, is imperiled. Almost exclusively found on private land, Oregon white oak is threatened...
    Resource Type:
    Dissertation
    Full Text:
    OF THE DISSERTATION OF Alexandra Paige Fischer for the degree of Doctor of Philosophy in Forest

  • Effects of an industrial fire on a community of south Phoenix, Arizona

    Creator:
    Degher, Alexandra B.
    Abstract:
    On August 31, 1992, Quality Printing Circuits, a circuit board manufacturing plant in Phoenix, Arizona, burned to the ground. The fire lasted approximately eight hours, creating a thick, black smoke that blew into the surrounding community. Emergency evacuation was erratic and since no air samples were taken during the fire,...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Alexandra B. Degher for the

  • Oceanic Protists

    Creator:
    Sherr, Barry F., Sherr, Evelyn, Caron, David A., Vaulot, Daniel, and Worden, Alexandra Z.
    Abstract:
    Protists are microscopic eukaryotic microbes that are ubiquitous, diverse, and major participants in oceanic food webs and in marine biogeochemical cycles. The study and characterization of protists has a long and distinguished tradition. Even with this history, the extraordinary species diversity and variety of interactions of protists in the sea...
    Resource Type:
    Article
    Full Text:
    CNRS and Université Pierre et Marie Curie, France. ALEXANDRA Z. WORDEN is Assistant Professor

  • Reconstructing salinity conditions in Nares Strait (Canadian Archipelago) from stable isotope profiles in bivalve shells

    Creator:
    Zima, Daniela
    Abstract:
    Nares Strait is one of three main passages of the Canadian Archipelago that channels freshwater from the Arctic Ocean to the North Atlantic. There are very few observations regarding the role of this region on the present day Arctic freshwater budget, and even less regarding the changes in freshwater fluxes...
    Resource Type:
    Masters Thesis
    Full Text:
    :________________________________________________________ Marta E. Torres, Kelly K. Falkner Nares Strait is one of three main passages of the