374 



Journal of Agricultural Research voi. xvni, No. i 



Oe. 

 per 



900 



800 



700 



600 



600 



400 



R-222323ail232131245416284671651474155 

 .C -746643174553823211263114122245513138 



Fig. 6.— Water requirement (in cubic centimeters per gram) of wheat tops grown in sand cultures with 

 low, medium, and high moisture content. 



Cc. 

 per 



gm. 



1800 



1600 



1400 



1200 



1000 



800 



R-2357113266748321311415145222:62453143 

 C-421276321213113344622351215637445156 



Fig. 7.— Water requirement (in cubic centimeters per gram) of wheat roots grown in sand cultures with 

 low, medium, and high moisture content. 



