152 INBREEDING AND OUTBREEDING 



100 



Growth Curves of 

 Two In"bred Strains 

 of Maize and Their 

 Hybrids. 



75 



CO 



« 



o 



C 



CO 

 (D 



50 



25 





P 

 (1-9) 



(1-7) 



30 



40 



T 



60 



I 

 70 



80 



50 

 Numljer of Days from Planting 



90 



100 



33. — Graphs showing growth curves of two inbred strains. of maize and thier first 

 and eeoond generation hybrids. 



