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By: Douglass, J. R. (James Robert)Edition:Publication info: Washington?, 1949?Volume: 1949Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: arthropods Economics Entomology land management Land use macroeconomicsBHL Collections:
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By: Weir, Wilbert Walter,Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926Volume: no.1377 (1926)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: AgSpace crop production Crop rotation crop yield experiment stations Fertilizers Internet resource land management long term experiments research methods Rothamsted Soil management Soil productivity YieldsBHL Collections:
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By: Nilsson, Sven G. - Franzén, Markus - Pettersson, LarsType: ArticleIn: Nature ConservationVolume: 6Series:Issue:Date: 2013Page Range: 31-48Publication Info: Pensoft Publishers 2013Subjects: agroecology Butterflies Conservation land management management recommendations semi-natural grasslands Sweden