THE PURCHASE AND MIXING OF FERTILIZERS 201 



These vrlues are based on the whulesale market reports 

 for six months preceding March 1 of each year, to which is 

 added about 20 percent of the price, to cover cost of handling. 



Potato Manure "A" without Potash 1916 



Nitrogen - * A • 4.1 1 to 4.94 per cent. 



Equal to Ammonia ^^k 5. to 6. " 



Soluble Phosphoric Acid ^^A 4. to 5. 



Reverted Phosphoric Acid ^^^^L 4. to S. 



Available Phosphoric Acid - M ^^L 8. to 10. 



Insoluble Phosphoric Acid - MgJ^^L 1. to 2. 



Total Phosphoric Acid '^^^^^^L 9 ' to ,2, 

 MANUFACTURED BY 



>C - Y- Z - FERTILIZER COMPANY 



Fig. 30. —Tag representative of the kind often used on bags of fertilizer 

 to state the percentages of their constituents. 



The following values are for the year 1914. 

 Trade Values of Plant Nutrients in Raw Materials 



Value per 

 Pound 



in Cents 



Nitrogen in nitrates 18.5 



Nitrogen in ammonium salts 18.5 



Organic nitrogen in dried and finely ground fish, meat and 



blood '. . 20.0 



Organic nitrogen in finely ground bone and tankage . . 19.0 



Organic nitrogen in coarse bone and tankage .... 15.0 



Organic nitrogen in castor pomace and cottonseed meal . 20.0 



Phosphoric acid, water soluble 4.5 



Phosphoric acid, reverted 4.0 



Phosphoric acid in fine bone, fish and tankage .... 4.C 

 Phosphoric acid in cottonseed meal and castor pomace . 4.0 

 Phosphoric acid in coarse fish, bone, tankage and ashes . 3.5 

 Phosphoric acid in mixed fertilizers, insoluble .... 2.0 

 Potash as high-grade sulfate, in forms free from muriate, 



in ashes, etc 5.25 



Potash as muriate 4.25 



Potash as castor pomace and cottonseed meal .... 5.0 



