r.o 



EXPERIMENT STATION. 



[Jan. 



Trade Values of Fertilizing Ingredients in Ttaxo Materials and Chemi- 

 cals for 1910 and 1911. 



Cents per Pound. 



1919. 



1911. 



Nitrogen: — 

 In ammonia salts, ........... 



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



Organic nitrogen in dry and finc-Eround fi.sh, meat and blood, 

 Organic nitrogen in fine' hone, tankage and nii.\cd fertilizers. 

 Organic nitrogen in coarse ' bone and tankage, ..... 



Organic nitrogen in cottonseed meal, castor jx)mace, 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 coarse' bone, tankiige 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 cjirbonate, ............ 



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 ]\Iarch 

 1, 1911, ])lus about 20 per cent. They are supposed to repre- 

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

 phosjdioric acid and potash as found in unmixed fertilizing ma- 

 terial in the principal markets in New England and New York. 

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

 of ])lant 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 Malerial. 



Thirty-three samples of ground bone have been collected and 

 analyzed. Ten were found deficient 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 having circular openings one- 

 fiftieth of an inch in diameter. Valuations of these materials are based upon degree of fineness 

 as well as upon comiKisition. 



2 Dis.solved by a neutral solution of ammonium citrate, specific gravity 1.09, in accordance 

 with method adopted by Aasociation of Official Agricultural Chemists. 



