i8 



matter in the leaves and in the stems do not differ much at the 

 young stage, 30 days after transplantation, but that thence-forward 

 it becomes greater in the stems, reaching a maximum at the time 

 of flowering. A remarkable reduction of the percentage in the stems 

 is noticed at maturity, at which time the grain has the heighcst 

 percentage. The percentage in the leaves decreases throughout the 

 development of the rice plant, especially during the period of matu- 

 ration, just as in the case of the stems. A great reduction in the 

 percentage in the roots takes place after the time of flowering ; this 

 means that the roots do not develop so much as the other organs 

 after the flowering season. 



The organic constituents of the dry matter which is formed in 

 the rice plant, will be explained in the following pages. 



