抄録
In succession to the preceding paper IX, the authors, in order to find a clue for observing the crop varieties as a population of individual crop plants, took up the coefficients of variation of the characters of individual plants of soybean varieties, and examineed the relationship among the estimators of coefficients of variation of individual charabtors as well as the relationship of the estimators to the planting density. Though it is not possible to compare the test results of soybean plants directly with those of paddy rice and two-rowed barley plants cited in the preceding paper, it can safely be said that the estimators of coefficients of variation of the characters of individual soybean plants are in general larger than those of paddy rice and two-rowed barley plants. Connected with the estimators of coefficients of variation of the respective chalacters of individual soybean plants, it can be said that in the case of the characters related to the stem height is the smallest in general, followed by the case of the characters related to the yield, and the estimator of coefficients of variation is the largest in the case of the characters related to the branchings. According to the average of estimator of coefficients of variation and the range of estimator distribution of all the sample varieties, and according to the relationship of these average of estimators of coefficients of variation and the range of estimator distribution to the planting density, the 24 characters observed here can be divided into 5 character groups.
