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Filtering by: Creator Hoagland, Porter Remove constraint Creator: Hoagland, Porter Contributor advisor sim Moore, David P. Remove constraint Contributor advisor sim: Moore, David P.

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  • A new hypothesis to explain phosphorus-induced zinc deficiencies

    Creator:
    Christensen, Neil Walter, 1944-
    Abstract:
    The phenomena known as "phosphorus-induced zinc deficiencies" are poorly understood. Conclusions drawn from research efforts designed to identify the mechanism of the phosphorus-zinc interaction are, in many cases, incompatible. Similarities in the data from a number of literature reports of "phosphorus-induced zinc deficiencies" have led to the development of the...
    Resource Type:
    Dissertation
    Full Text:
    (Hoagland and Arnon, 19 38) further modified to accommodate the phosphorus and zinc variables and to

  • Manganese absorption by barley roots

    Creator:
    Maas, E. V. (Eugene Vernon), 1936-
    Abstract:
    An investigation of Mn uptake by five-day-old excised barley roots revealed that a metabolically-mediated process was involved. In short-term experiments, the rate of Mn absorption was comparable to that of the macronutrient cations. Like other metabolically absorbed cations, the Mn absorption rate was a direct function of the ambient concentration...
    Resource Type:
    Dissertation
    Full Text:
    ; Pollard and Smith, 1951; Knauss and Porter, 1954) has been reported to be very rapid, though in each