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U.S. Department of Agriculture Food and Agriculture Organization (FAO) National Agricultural Library (NAL) Agricultural Research Service, USDA
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The Consultative Group on International Agricultural Researc The Arbor Day Foundation Agriculture and Agri-Food Canada Center for New Crops and Plant Products
Agriscape Electronic Digital Information Source (EDIS) Virginia Cooperative Extension Northeast Forestry University
Agriculture 21 Colorado State University Cooperative Extension Animal and Plant Health Inspection Service (APHIS) Agricultural University of Hebei
     
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