About HANAYAMA SUSUMU
About 山形大学農学部
About ANNAKA TAKEYUKI
About 山形大学農学部
About 農業農村工学会論文集
About phosphorus
About pH
About concentration (ratio)
About water temperature
About oxidized layer
About anion
About phosphate
About soil temperature
About elution
About paddy soil
About iron hydroxide
About algae
About high water content
About total phosphorus
About concentration of dissolved oxygen
About phosphate ion
About iron(III) hydroxide
About Plants
About Cryptogamae
About Phosphate
About reduced layer
About ferric hydroxide
About Agricultural engineering
About Recycling of resources
About Soil management
About 高含水比
About 水田土壌
About 田面水
About pH
About リン
About 溶出