302 MAINE AGRICUIvTURAI, EXPERIMENT STATION. 191O. 



latest rows of the 1908 plot should produce only such a slight 

 effect on the earliness in the next year's crop. 



Many of our results seem to indicate that earliness, in a large 

 part at least, is a physiological rather than an hereditary phe- 

 nomenon. There seems to be no doubt but that corn once 

 adapted to its local environment can be improved in regard to 

 earliness by a rigid selection of the earliest plants for one or 

 two years. After that it seems doubtful if any farther improve- 

 ment can be made by selection for earliness, unless the corn 

 becomes better adapted to local conditions. This matter will be 

 tested farther and discussed more fully in a later publication. 



Table 12 gives a summary of these two plots with respect to 

 yield. It is very remarkable that these two plots should yield 

 exactly the same amount of seed corn. Plot IV B had a slightly 

 larger per cent, of its corn on nubbins but the difference is insig- 

 nificant. 



TabeE 12. 



Yield of Plots Planted with Seed from an Early and a Late 



Row. 





Good Seed Baes. 



Nubbins. 





Plot No. 



Weight of 

 green 

 ears in 

 pounds. 



Calculated 

 weight of 

 dry ears 

 in 

 pounds. 



Bushels 

 per 

 acre. 



Weight 

 green in 

 pounds. 



Calculated 

 weight 

 dry in 

 pounds. 



Percent, 

 of total 

 weight 

 of corn 

 borne on 

 nubbins. 



IV A (Early) .... 

 IV B. (Late) .... 



386.50 

 386.50 



160.55 

 160.55 



31.58 

 31.58 



75.50 

 87.00 



31.36 

 36.14 



16.34 

 18.37 



