PLATE II. 



EFFECT OF ACIDULATED PHOSFHATE IN NEUTRALIZING THE EFFECT OF 



"SOIL ACIDITY." 



Cabbages, Crop of 1917. 



Nitrogen and phosphoric acid without limo. 

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

 9,600 pounds. 



Nitrogen and potash v.ithout lime. Yield per 

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

 (An absolute crop failure.) 



A. W7:hout Lime. 

 The omission of phnsphorio afid under aeid soil conditions was fataL 





Nitrogen and phosphoric arid v.ilii lime. 

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

 5,880 pounds. 



NitrML'.'i. :iih1 |imI:,>1, ,miI, liiiuv Vii-ld per 

 acre: good, 20,00(1 pounds; jioor, 7,600 

 pounds. 



B. With Lime. 



A fair crop wa.s produced without phosphoric acid, although, as shown on the opposite 

 page, complete treatment gave much the larger crop. 



