About OZAWA TATSUO
About 岩手県農試
About SASAKI KENJI
About 岩手県農試
About ENDO MASAHIKO
About 岩手県農試
About ONO TSUYOSHI
About 岩手県農試
About 北日本病害虫研究会報
About Chinese cabbage
About silica-alumina ratio
About Soil chemistry
About Vegetables
About ほ場
About 白菜
About 根こぶ病
About 発病
About 抑止
About 現象