60 



H. H. Love and C. E. Leighty 





'^ 



lO 



CD 



t> 



00 



C5 



o 



1— 1 



(M 



CO 



^ 



lO 



o 



I>. 



00 



05 







1 



CO 



^. 



i 



^ 



1 



^ 



1 



C3 



1 

 o 



1 



1 



1—1 



1 



CO 



4^ 

 1—1 



1 



I— 1 



1 



T— i 





2 



1 



2 



5 



1 



5 



6 



11 



6 



5 



4 



2 



1 



1 









50 



8 





3 



8 



11 



20 



25 



18 



16 



18 



7 



4 



3 



1 









134 



4 



2 



1 



5 



10 



11 



24 



29 



31 



17 



21 



13 



2 









1 



167 



5 





1 





4 



3 



6 



5 



7 



7 



3 



1 



1 











38 



6 



7 



1 







2 



2 





2 



1 



2 







1 











10 

 1 



7 18 28 41 61 65 61 49 35 20 8 







Fig. 67. — Number of culms per plant, subject 



Average yield of culm per plant in grams, relative. 1910 

 Coefficient of correlation = .070 zh .034 



400 





CO 



!>. 



00 



C: 



o 



^. 



c^ 



CO 



'^ 



o 



o 



t^ 



00 



o> 



q 







kO 



O 



t> 



00 



o 



o 



1—1 



1—1 



1—1 



1— ( 



1—1 



o 



t^ 



00 



05 





2 









2 









2 

















4 



3 







4 



9 



1 



3 



3 



1 



2 



1 





1 









25 



4 



1 



3 



1 



4 



7 



8 



11 



10 



2 



5 



5 



3 



1 







61 



5 





1 



1 



2 



6 



1 



13 



20 



13 



12 



5 



3 



1 







78 



6 









1 







4 



12 



13 



11 



7 



4 



2 



1 



1 





61 



7 









1 



3 



6 



14 



13 



12 



5 



2 



4 







1 



61 



8 









2 



2 



3 



9 



20 



9 



12 



5 



7 



1 







70 



9 















1 



5 



3 



7 



5 



2 









23 



10 















1 





3 



1 



1 



1 



1 





1 



9 



11 

















1 









1 



3 







5 



12 

















1 









1 









2 



13 





































14 















1 



















1 



1 4 6 21 24 25 65 86 55 50 27 25 8 1 2 400 



Fig. 68. — Number of culm^ per plant, subject 



Average yield of culm per plant in grams, relative. 1912 

 Coefficient of correlation = .383 ± .029 



from .070±.034 for 1910 to .387±.026 for 1909. This is a fluctuating 

 correlation which is only fairly high in any case. From this it may be 

 concluded that the relation between culm production in the plant and the 

 yield of the separate culms is not very close, and is also subject to modi- 

 fication by varying environmental conditions. It was -eeen above, how- 

 ever, that the relation of number of culms to total yield of plant is very 



