About MIYATAKE KYOICHI
About 農研機構 中央農業研究セ
About 農村経済研究
About cultivation management
About weeder
About paddy field
About cultivation
About organic farming
About work and operation
About working hour
About agricultural management
About improvement of efficiency
About weeding
About rice field
About rice crop
About organic cultivation
About agricultural operation
About agricultural management
About efficiency upgrading of job
About Agricultural economy,agricultural management
About Rice cropping
About 除草
About 稲作
About 可能性