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  1. By: Douglass, J. R. (James Robert)
    Publication info: Washington?, 1949?
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: arthropods  Economics  Entomology  land management  Land use  macroeconomics  
  2. 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
  1. By: Nilsson, Sven G. - Franzén, Markus - Pettersson, Lars
    Type: Article
    In: Nature Conservation
    Volume: 6
    Date: 2013
    Page Range: 31-48
    Publication Info: Pensoft Publishers 2013
    Subjects: agroecology  Butterflies  Conservation  land management  management recommendations  semi-natural grasslands  Sweden