208 



Fertilisei's 



[PT. in 



enables a buyer to discriminate between a cheap and a 

 costly article. The following is an actual illustration: 



A proprietary manure, containing 1-8 per cent, of 

 nitrogen, 22 per cent, of phosphate, and 2 of K2O, was 

 offered before the war at 5. 55. per ton. 



22 units of phosphates were @ I*. 5d. worth 

 2 K2O 4:S.e,d. 



The phosphates and K2O were worth ... 2 

 .. For 1-8 per cent, of N the dealers were 



asking ... ... ... ... 3 5 



i.e., unit price asked = 365. Id. 



which is clearly excessive. Further instances of excessive 

 price for low grade manures can be fomid in the agri- 

 cultural journals^. 



Many dealers give the percentages of ammonia instead 

 of nitrogen. Table XVIII is useful for the purpose of con- 

 version : 



Table XVIII. Conversion of percentages of nitrogen to 

 equivalent percentages of ammonia, and vice versa 



^ See Dr Voelcker's Reports in the Journal of the Royal Agricultural 

 Society, and Board of Agric. Leaflet, No. 270. 



