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  1. By: Kenwood, John Wooster, - University of Alberta. Department of Soils.
    Publication info: Edmonton, Alberta, University of Alberta, [1947]
    Holding Institution: University of Alberta Library
    Subjects: Crop improvement  Crop yields  Fertilizers  
  2. By: United States. Science and Education Administration.
    Publication info: [Washington], U.S. Dept. of Agriculture, Science and Education Administration, National Program Staff,
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Agriculture  Crop yields  Periodicals  Plant breeding  Plants, Cultivated  Research  United States  
  3. By: Chilcott, E. C. (Ellery Channing), - Cole, John S. (John Selden), - Burr, William Wesley,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Crop yields  Great Plains  Tillage  
  4. By: United States. Agricultural Research Service.
    Publication info: [Washington, D.C.], The Service,
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Agriculture  Crop yields  Periodicals  Plant breeding  Plants, Cultivated  Research  United States  
  5. By: Bauer, F. C. (Frederick Charles),
    Publication info: Urbana, Ill, University of Illinois Agricultural Experiment Station, 1930
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Agricultural experiment stations  Crop yields  Illinois  Soil management  
  6. By: Bauer, F. C. (Frederick Charles),
    Publication info: Urbana, Ill, University of Illinois Agricultural Experiment Station, 1929
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Agricultural experiment stations  Crop yields  Illinois  Soil management  
  7. By: Parker, M. W. (Marion Wesley), - Borthwick, H. A. (Harry Alfred),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Crop yields  Effect of light on  Plant photoperiodism  Plants  
  8. By: Farrell, F. D. (Francis David) - Aune, Beyer.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Belle Fourche  Crop yields  Irrigation farming  South Dakota  
  9. By: Robertson, James W. (James Wilson),
    Publication info: S.l, s.n, 1899?
    Holding Institution: Canadiana.org
    Subjects: Agriculture  Canada  Crop yields  
  10. By: O'Donovan, J. T. - Alberta Environmental Centre.
    Publication info: Vegreville, AB, Alberta Environmental Centre, 1990
    Holding Institution: University of Alberta Library
    Subjects: Barley  canola  Control  Crop yields  Weeds  Wheat  Yields  
  11. By: United States. Agricultural Research Service.
    Publication info: [Washington, D.C.], Agricultural Research Service, U.S. Dept. of Agriculture, 1954
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Agricultural pests  Agriculture  Crop yields  United States  Veterinary medicine