Oct. :5. 1914 



Water Requirement of Plants 



49 



Table XXVIII. — Water requirement of weeds at Akron, Colo., in 1913 — Continued 



RELATIVE WATER-REQUIREMENT MEASUREMENTS 



The relative water requirement of the different varieties of plants 

 grown at Akron in 191 2 is summarized in Table XXIX, Kubanka wheat 

 being used as a basis of comparison. Grimm alfalfa is seen to have the 

 highest water requirement of the 42 species and varieties tested during 

 191 2, while Kursk millet proved the most efficient of all the plants 

 tested. • The varieties arc also grouped on the basis of crop or genus, and 

 their mean water requirement compared with the mean water rcquire- 

 60300°— 14 4 



