52 



EXPERIMENT STATION, 



[Jan. 



Trade Values of Fertilizing Ingredients in liaiv Materials and Chemi- 

 cals for 1910 and 1911. 



Cents peh Pound. 



1911. 



NitroKcn: — 

 In aiiiiiionia salt.s, ........... 



In nitrates, ............ 



Organic nitrogen in dry and fine-ground fush, meat and blood, 

 Or^unic nitrogen in fine' bone, tankage and rubced fertilizers. 



Organic nitrogen in coarse ' bone and tankage 



Organic nitrogen in cottonseed meal, castor pomace, linseed meal, etc.. 



Phosphoric acid; — 



Soluble in water, 



Soluble in neutral ammonium citrate solution (reverted phosphoric 



acid), 2 



In fine ' ground bone and tankage, 



In coar.se ' bone, tankage and ashes, ....... 



In cottonseed meal, linseed meal and castor pomace, .... 



Insoluble (in neutral ammonium citrate solution) in mixed fertilizers. 



Potash: — 

 As sulfate, free from chlorides, ........ 



As muriate (chloride), 



As carbonate, ............ 



In cottonseed meal, castor pomace, linseed meal, etc., . . . . 



\ 



The basis for these trade values was the average wholesale 

 quotations of chemicals and raw materials as taken from the 

 commercial publications during the six months preceding March 

 1, 1911, plus about 20 per cent. They are supposed to repre- 

 sent the average cost per pound for cash at retail of nitrogen, 

 phosphoric acid and potash as found in unmixed fertilizing ma- 

 terial in the princi]>al markets in New England and New York. 

 There has been but little change in the cost of the various forms 

 of plant food, with the exception of the better forms of organic 

 nitrogen which have shown a considerable advance as compared 

 with the previous year. 



{e) Unmixed Fertilizing Material. 



Thirty-three samples of ground bone have been collected and 



analyzed. Ten were found dciicient in phosphoric acid and 5 



in nitrogen. The average retail cash price for ground bone has 



been $31.32 per ton, the average valuation $29.80, and the per- 



' Fine and medium bone and tankage are separated by a sieve liaving circular openings one- 

 fifiicth of nn inch in diameter. Valuations of these materials are based upon degree of fineness 

 as well .as upon composition. 



2 Di.ssolvod by a neutral solution of ammonium citrate, specific gravity 1.09, in accordance 

 with method adopted by Association of OfTicial Agricultural Chemists. 



