of dry matter. But before entering into a discussion on this point, 

 it seems of interest to remark on the relation of climatic conditions 

 to the length of the plant's life. In the summer of 1914, rice grown 

 from similar seed was raised both at Taihoku H^Jfc, Formosa, and at 

 Shidzuoka pjff|^, 119 miles southwest of Tokio, Japan. The number 

 of days for vegetative growth and maturation are given in the follow- 

 ing table :-- 



Table 10. Number of Days for the Plant's Life. 



It is noticed in the above table that the length of the periods, 

 which -the rice crops at both places need for their vegetative growth 

 and maturation, is very different. Although the kind of soil and 

 fertilizer and the mode of carrying out the cultivation may have some 

 influence on the development of the rice plant, they are not of 

 sufficient importance to affect the length of the plant's life, when the 

 rice crops are cultivated under normal conditions. Hewever, it is 

 believed that the temperature during the plant's life exercises a very 

 important and direct influence on its growth. All these rice plants 

 at Shizduoka take a greater number of days for their maturation 

 than at Taihoku. The vegetative development of the Japanese 

 variety, " Nakamura," cultivated at Shidzuoka, needs a longer time 

 than at Taihoku, as is very usual when crops of a southern climate 



^ The " number of days for the vegetative growth " is used to indicate the period from 

 transplantation to the heading out of the panicles ; and " heading out " means the stage, at 

 which about 7<j % of the lice pUnto under consideration produce panicles. 



