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  1. Crop production in the Great Plains area : relation of cultural methods to yields /
    By: Chilcott, E. C. - Burr, W. W. - Cole, John S.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1915.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Crop yields  Great Plains  Tillage  
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  2. Crop yields from Illinois experiment fields in 1929 together with a general summary for the rotation periods ending in 1929 / by F.C. Bauer.
    By: Bauer, F. C.
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station,1930.
    Contributed by: University Library, University of Illinois Urbana Champaign
    Subjects: Agricultural experiment stations  Crop yields  Illinois  Soil management  
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  3. Crop yields from Illinois soil experiment fields in 1928 / by F.C. Bauer.
    By: Bauer, F. C.
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station,1929.
    Contributed by: University Library, University of Illinois Urbana Champaign
    Subjects: Agricultural experiment stations  Crop yields  Illinois  Soil management  
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  4. Day length and crop yields /
    By: Parker, M. W. - Borthwick, H. A.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1942.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Crop yields  Effect of light on  Plant photoperiodism  Plants  
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  5. Effect of fall irrigation on crop yields at Belle Fourche, S. Dak. /
    By: Farrell, F. D. - Aune, Beyer.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1917.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Belle Fourche  Crop yields  Irrigation farming  South Dakota  
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  6. Improvements in crop growing
    By: Robertson, James W.
    Publication info: S.l. :s.n.,1899?
    Contributed by: Canadiana.org (archive.org)
    Subjects: Agriculture  Canada  Crop yields  
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  7. Influence of grass weeds on the yield and profitability of field crops in western Canada /
    By: O'Donovan, J. T. - Alberta Environmental Centre.
    Publication info: Vegreville, AB :Alberta Environmental Centre,1990.
    Contributed by: University of Alberta Libraries (archive.org)
    Subjects: Barley  canola  Control  Crop yields  Weeds  Wheat  Yields  
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  8. Losses in agriculture : a preliminary appraisal for review /
    By: United States.
    Publication info: [Washington, D.C.] :Agricultural Research Service, U.S. Dept. of Agriculture,1954.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Agricultural pests  Agriculture  Crop yields  United States  Veterinary medicine  
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