About TAMURA HAJIME
About 道総研 十勝農試
About NAKATSU SATOSHI
About 道総研 北見農試
About TAKEUCHI HARUNOBU
About 道総研 中央農試
About KATO JUN
About 道総研 中央農試
About Hokkaido
About organic farming
About potato
About organic fertilizer
About fertilization(cultivation)
About oil cake
About microbial mineralization
About cultivation management
About cultivation technology
About rapeseed meal
About nitrogen mineralization
About potato
About Fertilizer application and efficiency
About Tubers(=corms)
About 北海道
About 有機栽培
About ばれいしょ
About 安定生産技術
About 有機質肥料
About 施肥方法