74 Nebraska Agricultural Exp. Station, Research Bui. 20 
CROSSING VARIETIES 
An investigation was carried on with 14 varieties during 
four years, 1014-1917, to determine what effect the crossing of 
varieties might have upon the yield of dent corn. A description 
of the growth habits of the varieties used will be found in Table 
27. The varieties used were so selected as to include a wide 
diversity of growth characteristics. Thirteen hybrids and their 
parents were tested each year. Their male parent was Hogue's 
Yellow Dent corn, thruout, while the female parent was differ- 
ent in each case. The F, hybrid seed was produced by planting 
rows of the varieties to serve as the female parents between 
rows of the Hogue’s Yellow Dent. All varieties except Hogue’s 
were kept detasseled, in order to insure their cross-fertilization 
with Hogue’s Yellow Dent. The date of planting the different 
varieties, for hybridizing, was so adjusted that their flowering 
period would coincide with that of the Hogue’s Yellow Dent. 
Fig. 19. — Corn to left of man, Hogue’s Yellow Dent; to the right, Min- 
nesota No. 13. Note the difference in plant height and vegetative 
development. To be compared with figure 20. (Table 27.) 
