Table 33.) or by the examination of samples from rice plant raised 



at Taihoku in 1913 and 1914. Herewith some figures for the latter, 



the samples having been taken from various plats : 



Some roots from 1913 spring crop contained 0.25% of phosphoric acid, 



other " " " " 0.24,%" " " , 



some " " 1914 " 0.19% " " , 



. other " " 0.22X " , 



other " " " 0.2$% " " , 



P. L, Gille and J. O. Carrero obtained 0.15%" of phosphoric acid in 



the roots of upland rice plants, (Jour. Agr. Research, vol. V, No. 9, 



Nov. 1915). Our preliminary test showed that ash from the roots 



contained much more iron than could be precipitated by the phosphoric 



acid of the ash in the process of ash analysis. Consequently, as 



the ordinary method of ash analysis was not suitable for determining 



the amount of phosphoric acid in the roots, the molybdate method 



was in the present experiments, used for making the required estimates. 



Table 53. Soda 



