The dairy farming in Hokkaido has beeing developed rapidly since 50's in twertieth century, the scale of daing farm has beeing extended constantly while the family number of dairy farmer is decreased.
摘要北海道奶牛业
20
纪50年代开始快速发展，奶农
数减少的同时经营规模不
。
The dairy farming in Hokkaido has beeing developed rapidly since 50's in twertieth century, the scale of daing farm has beeing extended constantly while the family number of dairy farmer is decreased.
摘要北海道奶牛业20纪50年代开始快速发展，奶农数减少的同时经营规模不。
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