抄録
1. In order to consider on theoretical basis of quality classification of rice, milling test was planned, using rice which come within the requirement of 3rd grade, and produced in each prefectures, as materials. 2. Between prefectures, highly significant differences are recognizable as to milling rate, and this significant differences are unchanged by adjustment of regression. 3. So we can classify quality of rice by the significant differences in milling rate shown after adjustment of regression.
