About HANAYAMA SUSUMU
About 山形大学農学部
About KANAYA YURI
About 株式会社建設技術研究所
About ANNAKA TAKEYUKI
About 山形大学農学部
About 農業農村工学会論文集
About paddy field
About paddy soil
About nitrogen form
About impounding
About aquatic plant
About algae
About variation
About pH
About chemical fertilizer
About Photosynthesis
About nitrate nitrogen
About paddy water
About attached algae
About Plants
About Cryptogamae
About pH変化
About 水田土壌
About 田面水
About pH
About 付着藻類
About 窒素形態
About 硝酸態窒素
About Paddy soils
About Flooded water
About pH
About Periphyton
About Nitrogen form
About Nitrate nitrogen
About Agricultural engineering
About Soil chemistry
About 水田土壌
About 窒素形態
About 付着藻類
About 光合成
About 田面水
About pH