Corn Investigations 
14T 
nator test. As an average for both varieties, the disease free, 
diseased, and unselected corn produced respectively 17.6, 22.6, 
and 18.3 per cent rough ears; 16.1, 13.3, and 15.6 per cent 
smooth ears ; and 66.2, 64.0, and 66.0 per cent of medium rough 
ears. 
These data indicate that a slightly smoother type of corn is 
represented in those seed ears which had been determined to be 
free from root-rot disease by the germinator test. Perhaps a 
more important consideration brought out in Table 62 is the 
equal and almost insignificant amount of disease or decay pres- 
ent in the progeny ears of both diseased and disease free corn. 
Only one ear in every two thousand was noticeably affected in 
cither case by mould or decay of any kind. 
The progeny ears are further classified in Table 63 according 
to ear type, and show both the extent to which ear type selec- 
tion tends to transmit itself in a single generation and also the 
relation of the ear type of the progeny to the disease condition 
of the seed ear. 
Averaging both varieties, the rough, medium, and smooth 
seed ears planted produced respectively 23.3, 16.6, and 8.7 per 
cent rough ears in the progeny. On the other hand, the rough, 
medium, and smooth seed ears averaged 9.4, 14.4, and 21.2 per 
cent smooth ears in the progeny. 
RELATION OF STAND TO YIELD OF CORN 
In connection with another experiment, both Hogue’s Yellow 
Dent and Nebraska White Prize corn have been grown for a 
period of years at the rates of 1, 3, and 5 plants per hill. The 
results are given in Tables 64 and 65. As an average for seven 
years, Hogue’s Yellow Dent yielded 36.6, 44.6, and 40.3 bushels 
per acre respectively for 1, 3, and 5 plants per hill. As an aver- 
age for eight years the Nebraska White Prize yielded 37.1, 52.9, 
and 49.4 bushels per acre. 
The yield of the thin stand is augmented by an increased 
number of ear-bearing suckers, more 2-eared stalks, larger ears, 
and fewer barren plants. The reverse correlations hold for the 
heavy planting rate. 
Hogue’s Yellow Dent is a much more freely suckering variety 
than is Nebraska White Prize, which enables it to yield rela- 
tively better at a very thin rate of planting. 
Comparative results for a four-year period with the planting 
rates of 1, 2, 3, 4, and 5 plants per hill are given in Table 66. 
The grain yields for these rates were respectively 40.7, 49.4, 52.9, 
