iqi2] SKINNER— CREATININE AND CREATINE 163 



removed 769.4 milligrams of K 2 against 767.4 milligrams for the 

 creatine cultures. The removal of both phosphate and potash was 

 practically the same in the normal and creatine cultures. The 

 disappearance of nitrate was much less in the creatine than in the 

 normal cultures. The normal cultures removed 737.7 milligrams 

 against 612.7 milligrams for the creatine cultures, a difference of 

 125 milligrams. 



The influence of the creatine in regard to the removal of P 2 5 , 

 NH 3 , and K 2 is very similar to that shown by creatinine, and it 

 again appears that this substance as well as the creatinine can 

 replace nitrates in its effect on plant growth. 



Bureau of Soils, U.S. Department or Agriculture 



Washington, D.C. 



