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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Waltman, C. S. (Clair Smith),
    Publication info: Lexington, Kentucky Agricultural Experiment Station, University of Kentucky, 1936
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Apples  Effect of nitrogen on  Effect of phosphorus on  Growth  Peach  Plants  
  2. By: Heck, Arthur Floyd.
    Publication info: 1915
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: 1915  Agronomy  Effect of phosphorus on  Plants  Theses  UIUC