About SAWAMOTO TAKUJI
About 酪農学園大 酪農
About AKIYAMA HIROKO
About 農業環境技術研
About dinitrogen oxide
About farm land
About cultivated soil
About discharge
About calculation
About simulation model
About DNDC model
About amount of nitrogen application
About nitrogen dynamics
About Soil chemistry
About Environmental problems
About 耕地土壌
About 起源
About N2O排出
About 算定