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Filtering by: Creator Gifford, John Clayton, 1870-1949 Remove constraint Creator: Gifford, John Clayton, 1870-1949 Committee Member Chilcote, William W. Remove constraint Committee Member: Chilcote, William W.

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  • The response of tomatoes to atrazine as affected by magnesium and photoperiod

    Creator:
    Brenchley, Ronald Glenn
    Abstract:
    Studies were conducted to determine the nature of the interaction between atrazine (2-chloro-4-ethylamino-6-isopropylaminos- triazine) and magnesium on tomatoes. This interaction was studied under two light regimes: continuous light and a 12-hour photoperiod. Tomato plants were grown in sand cultures at three levels of magnesium fertilization. Four weeks after planting, atrazine...
    Resource Type:
    Dissertation
    Full Text:
    - dichlorophenoxyacetic acid (2, 4 -D) phyto- toxicity. Ishaque (1949) found a correlation between applications of some

  • The influence of magnesium on the toxicity of atrazine

    Creator:
    Brenchley, Ronald Glenn
    Abstract:
    Atrazine is an asymmetrical s-triazine herbicide used pre- and post emergence for weed control in many crops. Triazine herbicides have been used in the Pacific-Northwest for weed control in orchard crops. Under certain conditions where trees were grown in nutrient deficient areas, it was noted that toxic symptoms due to...
    Resource Type:
    Masters Thesis

  • John Wesley Powell : science and reform in a positive context

    Creator:
    Zernel, John Joseph, 1945-
    Abstract:
    John Wesley Powell worked actively for public land system reform while a director of geographical and geological surveys in the West from 1869 to 1894. Although this has won him acclaim as a conservationist, the basis of Powell's linkage of reform with scientific work is poorly understood. A study of...
    Resource Type:
    Dissertation
    Full Text:
    John Wesley Powell : science and reform in a positive