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Filtering by: Advisor Sampson, David B. Remove constraint Advisor: Sampson, David B. Academic Affiliation Crop Science Remove constraint Academic Affiliation: Crop Science

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  • Effect of sulfur on dinitrogen fixation of alfalfa (Medicago sativa L.)

    Creator:
    Lopez-Jurado, Gerardo
    Abstract:
    Field experiments were established in 1982 and 1983 on a Woodburn silt loam soil (Aquultic Argixeroll) to examine the effect of S fertilizer on dinitrogen fixation and dry matter yield of 10 week-old seedling alfalfa (Medicago sativa L. cv. 'Apollo'). Six levels of S fertilizer (0 to 67.2 kg S/ha)...
    Resource Type:
    Dissertation
    Full Text:
    Dinitrogen Fixation of Alfalfa (Medicago sativa L.) Abstract approved: Redacted for privacy David B

  • Nitrogen nutrition of seedling alfalfa (Medicago sativa L.)

    Creator:
    Eardly, Bertrand D.
    Abstract:
    Nitrogen fertilization of seedling legumes is a controversial practice intended to provide N to the plant during periods when seed N, soil N, and N₂ fixation may not meet plant requirements; eg. prenodulation, postharvest, or in the event of an inoculation failure. Field experiments were conducted in 3 consecutive years...
    Resource Type:
    Dissertation
    Full Text:
    .) Abstract approved: Redacted for privacy Dr. David B. Hannaway Nitrogen fertilization of seedling legumes

  • Evaluation of Rhizobium strains with three Mediterranean forage legumes for biological nitrogen fixation

    Creator:
    Streeter, Donald J.
    Abstract:
    Centuries of continuous grain cropping in northern Africa have reduced N levels in soils to a degree such that agricultural production is now largely dependent upon nitrogen fertilizer. Through the identification of highly effective legume and Rhizobium strain combinations, the production of protein-rich livestock forage and green manure can be...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for privacy Dr. David B. Hannaway Centuries of continuous grain cropping in northern

  • Evaluation of a Rhizobium meliloti transconjugant for increased nodulation and biological nitrogen fixation in alfalfa

    Creator:
    Mao, Meiyu
    Abstract:
    Agrobacterium rhizogenes has been shown to cause root proliferation and increased water use efficiency in certain woody dicots. Root proliferation may be desirable in herbaceous legumes as a means of increasing potential sites for infection by Rhizobium species and subsequent nodulation and nitrogen fixation. Thus, A. rhizogenes was used to...
    Resource Type:
    Masters Thesis
    Full Text:
    Alfalfa Redacted for Privacy Abstract approved: Dr. David B. Hannaway Agrobacterium rhizogenes has been