EXPERIMENT STATION BULLETINS. 



187 



Selling price and commercial valuation of different grades of fertilizers. 



SELLING PRICE. 



Lowest 



Highest 



Average 



COMMERCIAL VALUATION. 



Lowest 



Highest 



Average 



DIFFERENCE BETWEEN SELLING PRICE AND 

 COMMERCIAL VALUATION. 



IjOWeSt 



Highest 



Average 



Medium 

 grade. 



$19 50 

 28 50 

 24 15 



16 04 

 19 82 



17 80 



2 64 



12 24 



6 35 



Medium 

 high grade. 



lligli grade. 



Cost of One Pound of Plant-Food in Different Grades. 



In the following table is shown the cost per ijound to the purchaser 

 of one pound of nitrogen, available phosphoric acid and potash in the 

 different classes of fertilizers. 



Cost of one pound of plant-food in different grades of fertilizers. 



COST OF ONE POUND OP NITROGEN. 



Lowest 



Highest , 



Average 



COST OF ONE POUND OF AVAILABLE PHOS 

 PHORIC ACID. 



Lowest 



Highest 



Average 



COST OF ONE POUND OF POTASH. 



Lowest 



Highest 



Average 



Low grade. 



Cents. 

 26.3 

 44.6 

 30.5 



I 7.1 



12.1 



8.2 



7.1 



12.1 



8.2 



Medium 

 grade. 



Cents. 

 21.2 

 32.4 

 25.2 



5.7 

 8.8 

 6.8 



5.7 

 8.8 

 0.8 



Medium 

 high grade. 



Cents. 

 20.4 

 26.3 

 23.6 



5.5 

 7.2 

 6.4 



5.5 

 7.2 

 0.4 



High grade. 



Cents. 



19.4 

 20.4 

 22.2 



5.3 



7.2 

 6.0 



5.3 

 7.2 

 6.0 



A study of the above table brings out several very interesting facts : 

 The cost of one pound of plant-food is greatest in the low-grade and 

 lowest in the high-grade fertilizers. The highest cost for nitrogen, 



