1913.1 



PUBLIC DOCUMENT — No. 31. 



107 



Trade ]'alucs of Fertilizing Ingredients in Raw Materials and Chemicals 

 for 1011 and 1012. 



Nitrogen : — 

 In ammonia salts, 

 In nitrate 



Organic nitrogen in dry and fine ground fish, moat and blood, 

 Orsranic nitrogen in fine ' bone, tankage and mixed 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 sohition (reverted phosphoric 



acid),- ............ 



In fine-ground ' bone and tankage, ....... 



In coarse ' bone, tankage and ashes, ....... 



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



Insoluble (in neutral ammonium citrate solution) in mixed fertilizers 



Potash : — 

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



As nuiriate (chloride), .......... 



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



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



Cents per Pound. 



.5 25 



4 25 



00 



5.00 



• Fine bone and tankage are separated from coarse bone and tankage by means of a sieve having 

 circular openings one-fiftieth of an inch in diameter. Valuations of bone and tankage are based 

 upon degree of fineness as well as upon composition. 



2 Dissolved by a neutral solution of ammonium citrate, specific gravity, 1.09, in accordance 

 with method adopted by the .\ssociation of Official Agricultural Chemists. 



{e) Raw Produds and Cliemicah. 



Forty-five samples of ground bone, representing 32 analyses, 

 have been collected and examined. The average retail cash 

 price has been $32.63, and the average commercial valuation 

 as calculated by the table of trade values has been* $29.24. 

 Ground bone has averaged 3.12 per cent, nitrogen, 75.32 per 

 cent, of which has been found active by the alkaline perman- 

 ganate method. 



Twenty-eight samples of tankage have been inspected. The 

 average retail cash price for tankage has been $33.19, and the 

 average commercial valuation as calculated by the table of 

 trade values has been $33.05 per ton. Tankage has averaged 

 G.5S per cent, total nitrogen, of which 75.38 per cent, has been 

 found active by the alkaline permanganate method. Nitrogen 

 in fine tankage has cost on the average 10.08 cents; nitrogen 

 in coarse tankage has cost 15.06 cents per pound. 



Four analyses of dissolved bone have been made. The aver- 



