252 AGRICULTURAL EXPERIMEXT STATION. [Jan. 



Trade Values of Fertilizing Ingredients in Haw Materials and 

 Chemicals (1892). 



Cents 

 per Pound. 



Nitrogen in ammoniates, , 17.5 



Nitrogen in nitrates, . . . . . . 15. 



Organic nitrogen in dry and fine ground lish, meat, 



blood, 16. 



Organic nitrogen in cotton-seed meal and castor pomace, 15 . 



Organic nitrogen in fine-ground bone and tankage, . 15. 

 Organic nitrogen in fine-ground medium bone and 



tankage, 12. 



Organic nitrogen in medium bone and tankage, . . 9.5 



Organic nitrogen in coarser bone and tankage, . . 7.5 

 Organic nitrogen in hair, horn shavings and coarse fish 



scraps, ......... 7. 



Phosphoric acid soluble in water, 7.5 



Phosphoric acid soluble in ammonium citrate, . . 7. 

 Phosphoric acid in dry ground fish, fine bone and tank- 

 age, 7. 



Phosphoric acid in fine medium bone and tankage, . 5.5 



Phosphoric acid in medium bone and tankage, . . 4.5 



Phosphoric acid in coarse bone and tankage, . . 3. 

 Potash as high-grade sulphate, and in forms free from 



muriate or chlorides, ashes, etc., 5.5 



Potash as kainite, 4.5 



Potash as muriate, 4.5 



The organic nitrogen in superphosphates, special manures 

 and mixed fertilizers of a high grade is usually valued at the 

 highest figures laid down in the trade values of fertilizing 

 ingredients in raw materials, namely, fifteen and a half 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. The 

 insoluble phosphoric acid is valued in this connection at two 

 cents. 



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

 months preceding March, 1891, the respective ingredients 

 could be bought at retail for cash in our large markets, in 

 the raiv materials, which are the regular source of supply. 



They also correspond to the average wholesale prices for 

 the six months ending ]\Iarch 1, plus about twenty per cent. 



