About CHENG Weiguo
About National Inst. for Agro-Environmental Sci., Ibaraki, JPN
About YAGI Kazuyuki
About National Inst. for Agro-Environmental Sci., Ibaraki, JPN
About SAKAI Hidemitsu
About National Inst. for Agro-Environmental Sci., Ibaraki, JPN
About XU Hua
About Inst. of Soil Sci., Chinese Acad. of Sci., Nanjing, CHN
About KOBAYASHI Kazuhiko
About Univ. Tokyo, Tokyo, JPN
About Organic Geochemistry
About paddy field
About atmospheric carbon dioxide
About Organic geology
About Methane
About 環境
About 大気中CO2
About 稲
About 水田
About CO2
About 有機炭素
About δ13C