EXPERIMENT STATION BULLETINS. 185 



PRICES USED IN VALUATION OF FERTILIZERS. 



In determining the commercial valuation of fertilizers the following 

 schedule of prices has been used : Nitrogen in mixed fertilizers 201/2 

 cents per pound, in nitrates 181/^ cents per pound; potash soluble in 

 water 5 cents per pound; available phosphoric acid 5 cents per pound; 

 total phosphoric acid in bone 4 cents per pound; insoluble phosphoric 

 acid in mixed fertilizers containing nitrogen 2 cents per pound ; in fertil- 

 izers containing no nitrogen no value is given to insoluble phosphoric 

 acid. 



A valuation is determined as follows: The percentage or pounds per 

 hundred of each ingredient (nitrogen, available phosphoric acid, insolu- 

 ble phosphoric acid and potash) are multiplied by 20, giving the number 

 of pounds of each ingredient in a ton. The figures are then multiplied 

 by their respective pound prices. 



It should be clearly borne in mind that, in publishing these prices, 

 the station does not assume to dictate the price at which fertilizers shall 

 be sold. Owing to the fluctuation in prices, differences in cost of delivery 

 at different points, and other causes, the obtaining of true average market 

 prices is an impossibility. The schedule of prices has been used by 

 the station simply as a means of comparing the value of fertilizers as 

 guaranteed by the manufacturer with the value of the samples as col- 

 lected in the open market. Purchasers will often find these prices of 

 use in comparing the relative values of similar brands ofifered by different 

 manufacturers. 



ACKNOWLEDGMENT. 



I desire to acknowledge the efficient assistance of Miss Dorothea Mox- 

 ness and Mr. C. B. Collingwood by whom the greater part of the analyti- 

 cal work herein reported was performed, 

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