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Variability of cereal yields: Sources of change and implications for agricultural research and policy
Affiliation:1. Department of Earth Sciences, Montana State University, Bozeman, MT, USA;2. PennState Extension, Pennsylvania State University, University Park, PA, USA;3. Department of Agricultural Economics, Pennsylvania State University, University Park, PA, USA;4. Department of Agricultural and Applied Economics, University of Wyoming, Laramie, WY, USA;5. Department of Development Sociology, Cornell University, Ithaca, NY, USA;6. Department of Political Science, Montana State University, Bozeman, MT, USA;1. International Rice Research Institute (IRRI), DAPO Box 7777, Metro Manila, Philippines;2. Japan International Research Center for Agricultural Sciences (JIRCAS), Ohwashi, Tsukuba, Ibaraki 305-8686, Japan;3. Thasano Rice Research and Seed Multiplication Center, Provincial Agriculture and Forestry Office (PAFO), Savannakhet Province, Laos;4. Tamil Nadu Agricultural University, Tamil Nadu, Coimbatore 641003, India;5. National Institute for Agro-Environmental Sciences (NIAES), Kannondai, Tsukuba, Ibaraki 305-8604, Japan;6. Tamil Nadu Agricultural University, Tamil Nadu, Madurai 625104, India;1. United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan;2. Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan;3. Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan;4. Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
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