INSPECTION OF COMMERCIAL FERTILIZERS 

 Fertilizer Trade Values. 



Form of Plant Food. 



Value per 

 Pound. 



Unit 

 Value. 



Nitrogen. 



In ammonia salts 



In nitrates 



Organic nitrogen in fish 



Organic nitrogen in blood, meat and hoof meal 



Organic nitrogen in fine ' bone and tankage 



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



Organic nitrogen in mixed fertilizers 



Organic nitrogen in cottonseed meal, castor pomace, etc 



Organic nitrogen in calurea and urea 



Phosphoric Acid. 

 Soluble in water and neutral citrate of ammonia (available) 



In fine i bone and tankage and in fish 



In coarse ' bone and tankage .......... 



In pulverized manu'-es, seed residues, and ashes 



Insoluble in mixed fertilizers 



Potash. 



As sulfate 



As .muriate 



As nitrate 



As carbonate 



In pulverized manures, seed residues, and the water insoluble portion in 

 ashes 



$0.1125 

 .15 

 .38 

 .245 

 .265 

 .19 

 .27 

 .27 

 .14 



.05 



.055 



.045 



.04 



.02 



.059 

 .044 

 .045 

 .10 



.04 



$2.25 

 3.00 

 7.60 

 4.90 

 5.30 

 3.80 

 5.40 

 5.40 

 2.80 



1.00 



1.10 



.90 



.80 



.40 



1.18 

 .88 

 .90 



2.00 



.80 



■Fine bone and tankage refers to particles which, as sampled, will pass through a sieve with 

 circular openings 1/50 of an inch in diameter. Coarse bone and tankage refers to that portion 

 which will not pass through the sieve. 



The fertilizer trade values are based on average wholesale quotations taken 

 from trade journals for the six months ending March 1, 1931, plus 20 per cent 

 for overhead and proper allowance for bags, labor and freight when appropriate. 



