50 



THE POTATO 



WATER USED PER POUND OF DRY MATTER 



WILFARTH AND WIMMER 



Pounds 

 Potatoes . . . 200 to 230 

 Tobacco . . . 300 to 370 



Buckwheat 400 



Chicory 400 



Mustard 500 



Oats 460 



WHITSON 



Pounds 



Corn 270 



Soy-beans 527 



Clover 576 



Oats 503 



King ' has shown that the amount of water required 

 to make one pound of dry matter in the tuber and vine 

 of potatoes varied between 272 pounds and 497 pounds 

 during the years 1892-7, while that for oats ranged De- 

 tween 446 and 595 pounds; barley, 375 to 404 pounds; 

 peas, 477; corn, 223 to 398 pounds; clover (first crop), 

 370 to 582 pounds; clover (second crop), 730 to 983 

 pounds. 



"Irrigation and Drainage." F. II. King. 



