508 



ANNUAL REPORT OF THE 



Off. Doc. 



Fertilizers 



03 . 

 S K 



>" be 





Spring, 1913 



Complete, 



Rock-and-potash, 



Dissolved bone 



Ground bone, 



Dissolved rock 



Fall, 1913 



Complete 



Rock-and-potash, 



Dissolved bone 



Ground bone, 



Dissolved rock 



Spring, 1914 



Complete 



Rock-and-potash, 



Dissolved bone, 



Ground bone, 



Dissolved rock 



Fall, 1914 



Complete 



Rock-and-potash, 



Dissolved bone, 



Ground bone 



Dissolved rock, 



1.26 

 — .23 



3.08 



— 1 86 



.29 



2.44 



.60 



—.49 



l.Bl 

 .19 



2.21 



—1.19 

 1.02 



—1.28 

 —.77 



1.81 



.21 



2.97 



1.25 



.19 



In ammoniates such as dried blood and fish giiano, the unit is of 

 ammonia, of which 82.25 per cent is nitrogen; in acid phosphate the 

 unit is of phosphoric acid (phosphorous pentoxid). 



There has been a decided rise in the prices of some of the organic 

 ammoniates, and of ammonium sulphate, and a decrease in the cost 

 of nitrogen from nitrate of soda. 



Phosphate rock and sulphuric acid show little change in prices 

 compared with last year, but acid phosphate a considerable de- 

 crease. 



Composition of Raw Materials. — In order to form a correct idea of 

 the cost per pound of the fertilizer constituents of these materials, 

 it is needful to determine their composition or, in other words, the 

 quantities of valuable constituents each contains. The following 

 table shows the composition of raw materials used in the manufacture 

 of fertilizers. Few analyses of these materials, with the exception 

 of ground bone and dissolved rock, have been made in Pennsylvania. 

 The figures in the following table include the averages of the results 

 of analyses made in Connecticut, New Jersey and Massachusetts 

 during the past year, except in the case of ground bone and dissolved 

 rock phosphates, where Pennsylvania results alone are included. 



Tlie following statement from the weekly reports of the Oil, Paint 

 and Drug Reporter, of New York City, shows the average wholesale 

 prices of fertilizer ingredients in tlie market, Sept. 1, 1914, to March 

 1, 1915: 



