57 



Table 52. Amount of Nitrogen, Phosphoric Acid and 

 Potash, at Maturity in 100 Bundles of the Auttmin Crop. 



The percentages of the same ingredients, in corresponding 

 parts of the plants from each plat, show but slight differences. But 

 it is the first plat, fertilized with 68.0 Ibs. of potash, that has a 

 rather lower percentage in each case, and yet which produces, 

 as said before, the larger crop. However, the potash in the 

 stems from the first plat has a slightly higher percentage than 

 from the second plat, and its actual amount in the entire plant is 

 also greater. This is just the reverse to the results of experiments 

 with spring crops, which were described above. Therefore the autumn 

 and the spring crops may each have some particular balance of 

 nutrients proper to their respective developments. As observed in 

 Bulletin No. 10, - (previously referred in this paper, v. p. 10), ferti- 

 lizer experiments proved that the rice plant absorbed a greater 

 quantity of phosphoric acid from carbonized bone, (which is prepared 

 by the Formosan farmers in some localities), - than from superphos- 

 phate, and gave a poorer yield in the former case. Thus, a surplus 

 of this ingredient in this plant's body might also disturb rhe physi- 

 ological functions necessary for the proper development of the plant. 

 (These subjects were discussed in the following bulletins : Agr. 

 Expt. Stat. Formosa, Publication No. 95 ; S. K. Suzuki, " Absorption 

 of Phosphoric Acid from carbonized Bone," and No. 120, S. K. Suzuki; 

 ' Effect of the Over-absorption of Potash on the Growth of Rice 

 Plant") 



It is noticed in Table 47, that, according to Kelley and 

 Thompson's figures, there was a much higher percentage of phosphoric 

 acid in the roots than shown cither by the present experiments, (v. 



