13 



Ground bone, tankage and fish ... 68 



Nitrogen compounds, both organic and mineral 87 



Potash compounds ..... 42 



Phosphoric acid compoimds ... 33 



Lime compounds ..... 25 



702 

 At a meeting of representatives of the ex- 

 Trade Values periment stations of New England, New York 

 of Fertilizing and New Jersey, held during the first week of 

 Ingredients. March, 1912, the following table of trade 



values was adopted; this schedule has served 

 as a basis of valuing the fertilizers which appear in this bulletin. 

 The trade values represent the average cash cost per pound at 

 retail of nitrogen, potash and phosphoric acid as furnished by 

 chemicals and standard unmixed fertilizing material in the prin- 

 cipal markets in New York and New England. The data which 

 are used in obtaining these values are the average wholesale 

 quotations of chemicals and raw materials as found in commer- 

 cial publications from September 1, 1911 to March 1, 1912, plus 

 about 20 percent. 



Cents per pound. 

 Nitrogen. 1911. 1912. 



In ammonia salts 16 16.5 



In nitrates 16 16.5 



Organic nitrogen in dry and fine ground fish. 



meat and blood 23 22 



Organic nitrogen in fine* bone, tankage and 



mixed fertilizers 20 19 



Organic nitrogen in coarse* bone and tankage ..15 15 

 Organic nitrogen in cottonseed meal, castor pom- 

 ace, linseed meal, etc 21 20 



Phosphoric Acid. 



Soluble in water 4.5 4.5 



Soluble in neutral ammonium citrate solution 



(reverted phosphoric acid)** 4. 4. 



In fine* ground bone and tankage 4 . 4 . 



In coarse* bone, tankage and ashes 3.5 3.5 



In cottonseed meal, castor pomace and linseed 



meal 4. 4. 



Insoluble (in neutral ammonium citrate solu- 

 tion) in mixed fertilizers 2. 2. 



*Fine bone and tankage are separated from coarse bone and tankage by means of a 

 sieve having circular openings 1-50 of an incii in diameter. Valuations of bone and tankage 

 are based upon degree of fineness as well as upon composition. 



**Dissolved by a neutral solution of ammonium citrate, sp. gr. 1.09, in accordance with 

 method adopted by the Association of OfE.cial Agricultural Chemists. 



