670 



ANNUAIi REPORT OF THE 



Off. Doc. 



In the wholesale trade, dried blood, azotine, concentrated tankage 

 and hoof meals are usually sold on the basis of ammonia, disregard- 

 ing the phosphoric acid present. 



Insoluble phosphoric acid in dissolved rock is likewise omitted 

 from consideration, contracts being based solely upon the ''avail- 

 able" phosphoric acid ; nor in rock phosphates is any claim made for 

 the small quantities of nitrogen and potash they contain, nor in dis- 

 solved bone for the potash present. 



Under these conditions, the wholesale cost per pound in New York 

 of the valuable constituents of such materials as furnish but a single 

 fertilizing element, these materials being assumed to be in the state 

 of preparation and in the packing in which the manufacturer pur- 

 chased them, are given in the following table; also a ligure repre- 

 senting a fair retail price at the factory, the materials having under- 

 gone no change in treatment or packing and the allowance for ex- 

 penses and profit in retailing being 20 per cent. 



Wholesale Cost per Pound of Fertilizing Constituents, (New York) 



I. INGREDIENTS SUPPLYING ONE CONSTITUENT. 



Materials 



Constituent Valued 



v 



•E 

 P. 



o 



§ 



go 



Ms 



03 V 



^ 



Sulphate of ammonia, _ ! Nitrogen, 



>>itrate of soda, .. j Nitrogen, . 



Dried blo.i ; Nitrogen, . 



Concentrated tankage * i Nitrogen, . 



Puosphate rock,* ... 



Tennessee, 78 per cent., 



Acid phosphate, 



Double sulphate of potash and maenesia,... 



Sulphate of potash, 



Kainit, 



Muriate of potash, 



Phosphoric acid, total, 



Phosphoric acid, available, 



Potash 



Potash, 



Potash 



Potash, 



13.23 

 13.61 

 17.34 

 15.04 



.656 

 2.875 

 4.24 

 4.32 

 2.87 

 3.06 



16.88 

 16.33 

 20.81 

 18.05 



.787 

 S.46 

 5.09 

 5.18 

 3.44 

 4.39 



*The prices of phosphate rock are f. o. b. at the respective points of shipment, not New 

 York. The prices for potash are taken from the schedule of the syndicate, nad those of the 

 remainder from the 11, Paint and Drug Reporter, 



The value for nitrogen is based upon quotations for concentrated 

 tankage as outlined a year ago. This value is |2,93 per unit of 

 ammonia, which is equivalent to |3.56 per unit of nitrogen. 



The average composition of the ground bone and bone meal 

 samples analyzed last fall in Pennsylvania was: Phosphoric acid, 22.23 

 per cent. ; nitrogen, 2.87 per cent. 



The prepared bone contains less fat and moisture, and often less 

 nitrogen than ordinary rough bone, but these differences tend, in a 

 measure, to neutralize each other. Assuming for the rough bone 

 quoted in the New l^ork market the same composition as the bone 

 meal sold in Pennsylvania and for the value of the nitrogen |3.56 per 

 unit, as previously stated, the values per pound of the several constit- 

 uents would be: 



