organs develop at this stage. It is, therefore, believed that some 

 reserve materials for the formation of grain are accumulated in the 

 stems and leaves during the development of these organs. The nature 

 of dry matter that disappears from these vegetative organs will be 

 described later. 



The amount of dry matter in the roots from plat A increases 

 throughout the plant's life, but from plat B it decreases from the 

 time of flowering. The weight of dry matter in the roots from the 

 unmanured plat C <ilso diminishes at the stage of maturity. Although 

 it is very difficult to obtain perfect and complete specimens of the 

 roots, these reductions in amount arc too great to be regarded as 

 due to errors in the preparation of the samples. However, we can 

 not decide whether these decreases are due to the destruction of old 

 roots, or to the translocation of nutrients to other organs. 



The percentage of dry matter in the leaves, stems, roots and 

 grain is given in the following table, to show the relative distribution 

 at successive stages. 



Table 16. Distribution of Dry Matter in the Parts 

 of Rice Plant. 



It is found in the table that the relative percentage of dry 



