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Cyril G. Hopkins Books

  1. Nitrogen Bacteria and Legumes
With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils
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    Cyril G. Hopkins
    Nitrogen Bacteria and Legumes
With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

  2. The Story of the Soil; from the Basis of Absolute Science and Real Life

    Cyril G. Hopkins

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    Cyril G. Hopkins
    The Story of the Soil; from the Basis of Absolute Science and Real Life

  3. The Farm That Won't Wear Out

    Cyril G. Hopkins

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    Cyril G. Hopkins
    The Farm That Won't Wear Out

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