PLATE II. 



EFFECT OF ACIDULATED PHOSPHATE IN NEUTRALIZING THE EFFECT OF 

 "SOIL ACIDITY." 



Cabbages, Crop of 1917. 



Nitrogen and phosphoric acid without 

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

 9,600 pounds. 





*. V ^ 



Nitrogen and potash without lime. Yield per 

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

 (An absolute crop failure.) 



A. Wi.'fumt Lime. 

 The omission of phosphorii' ar-id under acid soil conditions was fatal. 





jU pcjuiiu^, pucir. 



5,880 pounds. 



Nitrogen and potash v. ith lime. Yield per 

 acre: good, 20,0UU puaiKis; poor, 7,600 

 pounds. 



B. With Lime. 



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

 page, complete treatment gave much the larger crop. 



