The Bulletin 



31 



acid represented by 300 and 450 pounds of 14 per cent acid phosphate 

 respectively, or 42 and 63 pounds of phosphoric acid per acre. 



Varying the amounts of phosphoric acid had no very marked effect 

 on the yield of corn. In all cases the fertilizer was applied at a loss. 

 The normal application came nearer paying for itself than any other. 

 These results show that for corn on this class of soil large amounts of 

 phosphoric acid in the form of acid phosphate cannot he applied with 

 profit. 



EFFECT OF VARYING QUANTITIES OF POTASH. 

 IN 1903 AND 1904. 



IN 1905, 1907 AND 1909. 



