882 



ANNUAL. REPORT OF THE 



Off. Doc. 



Composition of Non-Acidulated Fertilizer Ingredients (Per Cent.)- 



Composition of Acidulated Fertilizer Ingredients (Per Cent.). 



Dissolved bone-black, ... 



Dissolved bone,* 



Dissolved rock phosphate 



2 



6 



115 



17.13 

 15.86 

 16.00 



13.42 

 3.65 

 9.61 



1.90 

 7.22 



4.80 



1.73 

 4.99 

 1.59 



♦Also contains 2.S5 per cent, nitrogen. 



Comparing these figures with those of previous j^ears and con- 

 sidering only those cases where a considerable number of analyses 

 are available, the results seem to indicate no great change in the 

 composition of raw materials used in fertilizer manufacture. 



Cost per Pound of Fertilizer Constituents. — With the composition 

 of these raw materials and their price per ton, hundred weight, or 

 other unit of measure as a basis, the wholesale cost per pound of 

 the valuable constituents can be readily calculated. In many cases 

 the ammoniates are quoted ''per unit of ammonia," the term unit 

 being equivalent to per cent.; in goods sold by the ton of 2,000 lbs., 

 the unit is equal to 20 Tt)s., and 20 lbs. of ammonia contain 16.47 lbs. 

 of nitrogen. 



