CLIMATE AND PLANT GEOWTH. 



47 



16 



IS 



Af 



/Z 



10 







1526 



\ 









\ 





\ , 







iiy 



/I3Z 



US 









\^~ 



^ ^^ 



100 







\ 









\ 









\ 









N 



665 



-504. 



'"■^.^ 









4-07 







~- ^ 



-_-_-7rr_"=»- 



391 



35-4- 





























Oak- Brush Type Aspen -'Fir 



Wheat Includinq Heacls\ Water Used 



Wheat Without tteads \ Per Plant 



Spruce- Fir 



Water Requirement without heads expressed in 



percent of water requirement tvith heads 



Temperature above '^ F. 



Fig. 25. — Water requirement of wheat based on weight of plant including heads, compared 

 with water requirement based on weight without heads, (Experimental Series No. 2.) 



