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A. Tirol-Padrel
Crop, Soil & Water Sciences Division, International Rice Research Institute (IRRI):Chiba University
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K. Tsuchiya
National Agricultural Research Center for Kyushu Okinawa Region
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K. Inubushi
Chiba University
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J. K. Ladha
Crop, Soil & Water Sciences Division, International Rice Research Institute (IRRI)