About OYA KAZUHIKO
About OYA KAZUHIKO
About YOSHIDA TOMOHIKO
About 日本作物学会紀事
About paddy rice
About field study
About regional difference
About brown rice
About quality
About Tochigi prefecture
About cultivation management
About agricultural meteorology
About blast disease
About General
About Rice cropping
About 栃木
About 水稲
About 変動要因
About 地域
About 差異
About 現地試験