TRADE VALUES OF FERTILIZING INGREDIENTS IN RAW 



MATERIALS AND CHEMICALS. 



1890. 



■/' Cents per pound. 



Nitrogen in ammoniates, . 17 



" " nitrates, 14^ 



Organic nitrogen in dry and fine ground fish, meat, blood, 17 



" " " cotton-seed meal and -castor pomace, 15 



" " " fine ground bone and tankage, 16^ 



" " " fine ground medium bone and tankage, 13 



" " " medium bone and tankage, 10| 



" " " coarser bone and tankage, 8^ 

 " " '' hair, horn-shavings and coarse fish 



scraps, 8 



Phosphoric acid soluble in water, 8 



" " soluble in ammonium citrate, 7| 



" "in dry ground fish, fine bone and tankage, 7 



" "in fine medium bone and tankage, 6 



" "in medium bone and tankage, 5 



" "in coarse bone and tankage, 4 



" " in fine ground rock phosphate, 2 

 Potash as High Grade Sulphate, and in forms free from 



Muriate or Chlorides, Ashes, etc., 6 



" " Kainite, 4i 



" " Muriate, 4| 



The above trade values are the figures at which in the six months 

 preceding March, 1890, the respective ingredients could be bought af 

 retail for cash in oar large markets, in the raiv materials, which are 

 the regular source of supply. 



Trade Values in Superphosphates, Special Manures and Mixed 

 Fertilizers of High Grade. 



The organic nitrogen in superphosphates, sj^ecial manures and 

 mixed fertilizers of a high grade is usually valued at the highest fig- 

 ures laid down in the trade values of fertilizing iugrediems in raw 

 materials, namely, 17 cents per pound; it being assumed that the 

 organic nitrogen is derived from the best sources, viz., animal matter, 

 as meat, blood, bones, or other equally good forms, and not from 

 leather, shoddy, hair, or any low-priced, inferior form of vegetable 

 matter, unless the contrary is ascertained. For similar reason the 

 insoluble phosphoric acid is valued in this connection at three cents, 

 it being assumed, unless found otherwise, that it is from bone, or 

 similar sources and not from rock phosphate. In this latter form 

 the insoluble phosphoric acid is worth but two cents per pound. 



C. A. GOESSMANN, Director. 



The pubUcations of the Experiment Station will he sent free of charge to 

 all paHies interested in its work, on application. 



Press of Carpenter & INIorehouse, Amherst, Mass. 



