PLATE II. 



EFFECT OF ACIDULATED PHOSPHATE IN NEUTRALIZIXC THE EFFECT OF 



"SOIL ACIDITY." 



Cabbages, Crop of 1917. 



Nitrogen and phi '-.plii nir aciil \',itliiiut lime. 

 Yield per acre: good, 13,560 pounds; poor, 

 9,600 pounds. 



\. V ^ 



Nitrogen anil potash without lime. Yield per 

 acre: good, 160 pounds; poor, 840 pounds. 

 (An absolute crop failure.) 



A. Witliout Lime. 

 The omission of phosphoric acid under acid soil conditions was fatal. 



Nitrogen and phosphoric acid with lime. 

 Yield per acre: good, 21,560 pounds; poor, 

 5,880 pounds. 



Nitrogen and potash with lime. Yield per 

 acre: good, 20,000 pounds; poor, 7,600 



pounds. 



B. With Lime. 



A fair crop was produced without phosphoric acid, altliough, as shown on the opposite 

 page, complete treatment gave much the larger crop. 



