CLIMATE AND PLANT GROWTH. 



59 



Oak-br-ush 



/Ispisn 



S/:>rucG-f/ , 



— — — fluaporef/on 



— Temperature above '^0°F 



/^i^erac/e stem length 



— Dry weight per pJant 



Leaf length 



l/Vater used per p/ant 



Fig. 32. — Comparisoa between climatic factors and the growth of wheat. 



