The Bulletin. 



39 



Co7i finned. 



VEARS IN FIELDS A, B AND C. 



:heck plats and a corrected check was figured on this basis for each treated plat between checks. 



per cent acid phosphate respectively, or 42 and 63 pounds of phos- 

 phoric acid per acre. The results in all the fields show increased 

 yields and profits for all the quantities of phosphoric acid, but the 

 laro'est yields, increases and profits in all the fields were from the 

 plats receiving the normal quantity of phosphoric acid or 150 pounds 

 of 14 per cent acid phosphate, which is equal to 21 pounds of phos- 

 phoric acid per acre. Larger quantities than the above of phos- 

 phoric acid did not add to the yields of corn when the quantities of 

 nitrogen and potash remained the same. 



IREDELL TEST FARM; EFFECTS OF VARYING QUANTITIES OF POTASH. 



IN 1903, '01, '08, AND '08. 



