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  1. By: Harvey, A. E. - Intermountain Research Station (Ogden, Utah)
    Publication info: [Ogden, Utah], U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1986
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Ectomycorrhizas  Northwestern States  Soil management  Soil microbiology  Soil productivity  
  2. By: Carver, George Washington, - Tuskegee Normal and Industrial Institute. Experiment Station.
    Publication info: Tuskegee Institute, Ala, Experiment Station, Tuskegee Normal and Industrial Institute, 1905
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Alabama  Soil management  Soil productivity  
  3. By: Mausel, P. W. - Carmer, S. G. - Runge, Edward C. A.
    Publication info: Urbana, University of Illinois at Urbana-Champaign, College of Agriculture, Agricultural Experiment Station, 1975
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Illinois  Soil productivity  Soils  
  4. By: Weir, Wilbert Walter,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  crop production  Crop rotation  crop yield  experiment stations  Fertilizers  Internet resource  land management  long term experiments  research methods  Rothamsted  Soil management  Soil productivity  Yields