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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Letteer, C. R. (Clarence Ralph),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Fallowing  Field experiments  San Antonio  Texas  
  2. By: Morgan, George W. (George Walter),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1925
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Crop rotation  Fallowing  Montana