Corn Investigations 
19 
have been grown annually in isolated fields at the Experiment 
Station. The seed has been continued from five hundred or 
more ears annually, selected at random after husking, the only 
requirement being that the ears so selected are well developed 
and sound. The original Hogue’s Yellow Dent variety has been 
continued in the same manner at the Experiment Station since 
1910. During the period of 1903 to 1910, seed of the original 
Hogue’s Yellow Dent corn, to be used as a check, was obtained 
each year (at a distance of 30 miles) from the original grower. 
These two varieties, Hogue’s Yellow Dent and Nebraska 
White Prize corn, are both standard full season varieties, locally 
grown seed of which is well acclimated to conditions prevailing 
at this Station. Neither variety had ever been subjected to close 
type selection. 
ADAPTATION 
Under our conditions the importance of growing adapted 
corn can not be too strongly emphasized. It is the outstanding 
quality to be sought in seed corn. It surmounts all question of 
variety, ear and kernel type, color, and breeding. The charac- 
teristic differences between corn types adapted to various re- 
gional areas of Nebraska have been presented in Nebraska Re- 
search Bulletin No. 19. The following data in Table 2 and 
figures 1, 2, and 3, extracted from the above bulletin, illustrate 
the significance of growing well-adapted corn. 
In figures 1 and 2 are shown the mean climatic factors for 
this State, being compiled from thirty or more years’ data by 
the Nebraska Weather Bureau under the direction of G. A. 
Loveland. Progressing westward in the State, the rainfall de- 
creases, the growing season shortens, and the temperature low- 
ers. The westward lowering of temperature is due primarily to 
a rather gradual increase in altitude from 1,000 feet in the ex- 
treme east (Richardson County) to 5,000 feet in the extreme 
west (Kimball County). While there are also distinct soil dif- 
ferences within the State, they are far less potent factors in the 
local adaptation of corn than is climate. 
Native full-season seed corn typical of the region was ob- 
tained from each of the eleven counties indicated by number in 
figure 1. These seed sources represent widely differing climatic 
areas, ranging from a relatively favorable corn climate in the 
east to a relatively less favorable corn climate in the west. 
