About KUBOTA TETSUFUMI
About 農研機構 北海道農業研究セ
About FUJITA NAOAKI
About 農研機構 北海道農業研究セ
About 農業経営研究
About agricultural management
About dairy farming
About milk yield
About dairy cattle
About concentrated feed
About economy(efficiency)
About evaluation
About bovine mastitis
About questionnaire
About Hokkaido
About property
About Surveys and Questionnaires
About economical evaluation
About long-lasting
About lactation performance
About dairy farming management
About Agricultural economy,agricultural management
About Cattle
About Production engineering in general
About 酪農経営
About 乳牛
About 泌乳持続性
About 経済