624 AGRICULTURAL ANALYSIS 



method, the insoluble matter disappears. It will be seen that 

 there is no difficulty whatever in reporting soil analyses by this 

 method. This has already been demonstrated and illustrated by 

 the Ohio experiment station. 93 



In considering the different forms of nitrogen we can report 

 nitrate nitrogen, ammonia nitrogen, and organic nitrogen; and, 

 if necessary, we can also distinguish between organic and inor- 

 ganic sulfur and between organic and inorganic phosphorus, 

 as we do between organic and inorganic carbon. A complete 

 analysis of potassium chlorid would be reported: 



Per cent. 



Potassium 52 



Chlorin 48 



Total loo 



Whereas under the qjd system we have: 



Per cent. 



Potash (K 2 O) 63 



Chlorin (Cl) 48 



Total 113 



Less oxygen replaced by chlorin 13 



TOO 



One of the reasons for adopting thi? system is to secure ul- 

 timate uniformity. At the present time there is no uniformity. 



Nitrogen. A majority of the States already report nitrogen 

 as N, but several States report it as NH 3 , and the Bureau of 

 Soils reports it as NO 3 , NH 8 , and N. 



Phosphorus. The Bureau of Soils reports phosphorus as PO 4 , 

 P 2 O 5 , or P. Illinois reports it as P, and all other States as 

 P 2 5 . 



Potassium. The Bureau of Soils and the State of Illinois re- 

 port potassium as K, and all other States, also the Bureau of 

 Soils, report it as K 2 O. 



The various State laws with few exceptions permit the use 

 of "equivalents" in addition to the required statement of analy- 

 sis. Thus a uniform statement giving both N and NH 3 , P and 

 P 2 O , K and K 2 O could be used by all manufacturers, and it 

 K Ohio Agricultural Experiment Station, Bulletin 150, 1904 : 131. 



