47 



grain during maturation, yet it does not accumulate to such an extent 

 as the nitrogen and phosphoric acid. 



Assuming the total amount of each of these three ingredients 

 in ,the plant at maturity to be 100, then the mature grain contains 

 about 15% of all the potash in the plant, 60 % of all the nitrogen 

 and 53/6 of all the phosphoric acid. Though these figures may be 

 variable, dependent upon the conditions of cultivation, yet their 

 relative order as regards amounts, is, in the case of plants of normal 

 growth, fonnd always to hold good, so far as the author knows. 



In this connection, the distribution of these elements amoung 

 the parts of the grain, that is to say, in the chaff, bran and cleaned 

 lice, - will be explained. At present it is impossible to discuss this 

 problem with any great degree of accuracy, because there are not a 

 sufficient number of reliable analytical data, and moreover because 

 the perfect separation of the bran (seed-coat) from the cleaned rice 

 (endosperm) is not, as yet, a practical possibility. However, the 

 following figures, which are the average percentages of these ingredi- 

 ents contained in the parts of the grain, may give some general idea 

 of the distribution, and serve as data towards an eventual solution 

 of this question. 



Table 38. Nitrogen, Phosphoric Acid and Potash 



in the Parts of Grain. 

 (Expressed as percentage of dry matter) 



It is noticed in the above table that the bran contains the 

 highest percentage of all these ingredients, among which the percent- 

 age of phosphoric acid comes firsthand that of nitrogen considerably 

 exceeds that of potash. In the chaff the percentage of nitrogen is 



