Abstract
The yield components of 37 demonstration farms in Fukui pref. were investigated by multivariate analysis. The demonstration farms were classified into the southern and the northern parts of Fukui pref. bordering Kitakoyama in Takefu. This classification was coincided with soil texture in Fukui pref. Then, from the results of principal component analysis of yield components in Koshihikari in the southern part the yield mainly depended on ripening, on the otherhand, in the northern part it mainly depended on the grain number per head.
