i6 



increasing rate of dry matter, as observed in the case of the Japanese 

 varieties. However, it is not impossible to discern the same tendency 

 in the direction of increasing rate. As described above, the Japanese 

 and Formosan varieties have a somewhat similar rate of increase at 

 the young stage of their life, yet in later life the Formosan crop 

 has a very rapid increase in the amount of its dry matter, owing to 

 the higher temperature and the much shorter period of maturation 

 than in Japan. 



Table 15, Amount of Dry Matter in the Parts of 

 Rice Plant at Successive Stages of its Growth 



The absolute quantity of dry matter in the entire plant in- 

 creases throughout its life ; but in the various parts there are some 

 fluctuations in the amounts at different stages, as the above table 

 shows. The vegetative organs have an increase of dry matter until 

 the time of flowering, but in the period of maturation the dry matter 

 in the stems and leaves considerably diminishes, as the reproductive 



