On the yielding efficiency of Japanese rice varieties : continued On the total correlation coefficient between rice yielding factors, and between rice yielding factors and climatic conditions.

Abstract

I will state here on the yearly total correlation coefficient between each yielding factor of rice varieties, and correlation coefficient between climatic factors and yielding factors about all districts of Japan. These correlation coefficients are calculated on every prefecture of Japon of heading period, length of stems, numbers of stems and yield of grain per tan of rice varieties test of agricultural experiment station of every prefecture and yield of grain per tan of prefecture statistics. And I calculated the yearly correlation coefficient between climatic conditons such as mean temperature from. April to October, mean temperature of guly, the sunshine hours from April to October, and the volumes of rainfall from April to October, and heading period, length of stems, numbers of stems, prefecture and yield of grain per tan of rice variety test of agricultural experiment station of every prefecture and the yield of grain per tan of the prefecture statistics. From such correlation coefficients calculatcd on every prefecture I calculated the correlation coefficient of all district of Japan such as Tohoku, Hokuriku, Kanto, Tyubu, Kinki & Tokai, Sanin, Sanyo, Shikoku and Kyushu districts. The correlation coefficients are as follows, look at the table I. And I celebrate the results graphically, look at the Graphs.