12G Nebraska Agricultural Exp. Station , Research Bui. 20 
Chart 5. — Relation of ear type to yield. The standard type represents 
the ordinary unselected seed of the variety tested. Data taken from 
Tables 49, 50, and 51. 
ous ear characteristics with the quantity of grain on an ear. 
Without further consideration, the amount of grain per ear and 
shelling per cent came to he regarded as expressive of grain 
yield per acre. Arbitrary ear standards were improvised and 
offered as ideals for seed selection. Experimental evidence and 
farm experience in later years have served to disprove the above 
correlations for many sections of the country. It is now appar- 
ent that ear and kernel type are primarily significant only to 
the extent that they indicate certain correlated plant character- 
istics. The reliability of such indication hinges upon previous 
knowledge of the corn's source and adaptation. 
It is possible, indirectly, to exert marked influence upon the 
