122 



SOY BEANS IN BENGAL, BIHAR AND ORISSA. 



size of the seeds whose oil content had been determined. If 

 external conditions affect the plant at all, they are very likely to 

 show their action upon the weight of the individual seed, or 

 upon its total yield. As a case in point, we may instance a so}' 

 bean (Type VI Nepali) whose seeds when grown at Sabour are 

 only half the weight of those grown in the hills. 



From about 50 samples of the same type the correlation 

 factor between the size of seed and oil content is found to be 

 extremely small. 



Hence it follows that although in the case of three definite 

 types of soy beans the mean oil content was found in two cases 

 to be relatively high and the nitrogen content was low, while in 

 the remaining unit species the reverse phenomenon was observed, 

 yet in any particular type there was not any great indication of 

 the dependence of oil and nitrogen content upon one another or 

 upon such external conditions as would modify the size of the 

 seed. We are, therefore, led to believe that in the three types 

 studied, the percentage content of nitrogen and oil is in all prob- 

 ability a characteristic that is inherited and that the variations 

 which we have observed have been purely due to the differences 

 in the types examined, and not to external causes. 



Finally in 1911 the means of the bulked plots from the s 

 of single plants were found to be as follows : — 



* This includes 21 separate plots each grown from single plants grown from the original 

 No. 91C. The results of each of these plots are given in Table IV. 



From this it will be seen that the mean nitrogen content 

 of the black type again far exceeds that of the others, while 

 the differences as regards oil content are almost identical with 

 those observed last year. 



