14 
Nebraska Agricultural Exp. Station , Research Bui. 20 
have in the embryo and endosperm of the kernel an actual 
hybrid product, just as we have in the plant produced when the 
seed is planted. We should expect increased h} 7 brid vigor or a 
lack of it to be imparted to the kernel to correspond with that 
of the hybrid plant which it produces. In these experiments 
the immediate effect of foreign pollen from one commercial 
variety upon another was negligible, whereas hybrid kernels on 
pure line ears were increased relatively an average of 11 per 
cent. 
There is nothing in these data which suggests that the re- 
sults from comparative tests of commercial varieties of dent 
corn, as now conducted, are seriously invalidated because of any 
complicating immediate effect of fertilization by foreign pollen. 
23. As an average for seven years, Hogue’s Yellow Dent 
corn yielded 36.6, 44.6, and 40.3 bushels per acre, respectively, 
when grown at the rates of one, three, and five plants per hill 
in hills 3.5 feet apart. At similar rates in an eight-year test, 
Nebraska White Prize corn yielded 37.1, 52.9, and 49.4 bushels 
respectively. In a four-year test, the planting rates of one, two. 
three, four, and five plants per hill yielded respectively 40.7. 
49.4, 52.9, 50.7, and 49.3 bushels per acre. Evidently there may 
be considerable variation in stand, fluctuating about three plants 
per hill, under Experiment Station conditions, without a ma- 
terial effect upon yield. 
24. In a five-year test to determine the effect of ununiform 
distribution of plants in the field, the following varied distribu- 
tions were compared: (1) Uniformly three plants per hill, (2) 
alternating hills with two and four plants, (3) alternating hills 
with one, two, three, four, and five plants, and (4) alternating 
hills with one, three, and five plants. The respective yields of 
grain per acre for these methods of distribution were : 59.0. 59.2, 
58.6, and 56.0 bushels. 
