48 



BULLETIN 700, U. S. DEPARTMENT OF AGRICULTURE. 



to 



/9 

 /8 

 17 

 /6 

 /5 

 W 

 /3 

 12 

 II 

 10 

 9 

 8 

 7 

 6 

 5 

 4 

 3 

 l 



/76i 



1303 



809 



\ 



73 i 



5/6" 



SSI 



653 



7S6 



Oak Brush - Type A spen - Fir Spruce - Fir 



Temperature Above 40 



\W.R. Without Heads Expressed 

 \tn Percent Of W.R. With Heads 



- Brome Grass.- Heads 1 Water Used 



Brome Grass + Heads J Per Plant 



FIG. 26. Water requirement of brome grass based on dry matter of plant including 

 as compared with water requirement hased on dry matter without heads. 



