May, '14] 



GRANITIC SOIL POTASSIUM. 



Fig z 



9 



□ 



# H R Y 



The position of this line is below the corresponding line in 

 Figure 1 and it may also be somewhat influenced by the fact that 

 moisture conditions affected the yield and possibly the composi- 

 tion of the crop. 



In order to show the effect of nitrogenous fertilizers on the 

 yield and potassium content of the crop, data have been obtained 

 from plots fertilized with nitrate of soda. Table III shows the 

 yield, the per cent, of potassium oxide and the amount of potas- 

 sium oxide removed. 



