54 



Table 48. Amount of Nitrogen, Phosphoric Acid 

 and Potash in the Entire Plant, (per acre). 



Table 49. Ratio of Nitrogen, Phosphoric 

 Acid and Potash. 



Both the percentage and the actual amount of potash are 

 greater in the rice plant cultivated on the complete fertilizer plat, 

 which has a poorer yield of grain and straw. as proved in our 

 experiments. The greatest difference in the percentages of potash 

 is, again in this experiment, found in the stems from the two plats, 

 while nitrogen and phosphoric acid show only slight differences in 

 the corresponding parts of the plants. The ratios of these three 

 ingredients agree in showing that potash has the greatest difference, 

 (v. Table 49) Therefore it seems that an excess of potassium in 

 the plant's body exerts a by no means negligible influence on the 

 yield of rice, disturbing as it does the balance of nutrients. 



However, repeated experiments with the autumn crop in our 

 Station, proved that the plats which were rich in potash gave a 

 better yield. In the autumn of 1914 the experiment was carried 

 out again, and it confirmed the above fact, as may be seen in the 

 following table : 



