SUSCEPTIBILITY OF DENT CORN TO ROOT ROTTING. 5 
experiment, that at Woodburn, IncL, the horny ears produced the 
higher initial stand in the field. This difference in stand was main- 
tained throughout the growing season, as shown by the figures for 
initial stand compared with those for final stand, taken just pre- 
vious to harvesting. This inferiority in stand was reflected in the 
decreased yield of the starchy group. Results due to differences in 
stand were eliminated by correcting the yields of both groups to per- 
fect stand for each experiment. In this manner the actual superior- 
ity of the horny seed ears becomes apparent. Thus, while the aver- 
age difference in final stand in the 11 experiments was 2.78 per cent 
less for the starchy ears, this was accompanied by an average reduc- 
tion in actual yield of 5.57 per cent. Upon correcting both groups 
to perfect stand, the average decrease in yield incurred through the 
use of starchy seed ears amounted to 4.2 per cent. 
Table 2. — Actual and corrected yields from starchy and from horny ears of dent 
corn in ear-to-roiv tests in Indiana in 1918, 1919, and 1920. 
Number of ears used in 
each plat. 
Decrease resulting from the use of 
starchy seed (per cent). 
Location of plat (Indiana). 
Total. 
Starchy. 
Horny. 
Stand. 
Yield. 
Initial. 
Final. 
Actual. 
Corrected 
to perfect 
stand. 
Fort Wayne 
45 
48 
46 
50 
44 
50 
37 
80 
45 
20 
49 
19 
20 
11 
11 
26 
17 
21 
62 
35 
5 
21 
26 
28 
35 
39 
18 
33 
16 
18 
10 
15 
27 
4.12 
0) 
4.30 
0) 
C 1 ) 
0) 
9.86 
0) 
4.64 
1.60 
0) 
4.26 
3.04 
5.48 
1.47 
.78 
1.73 
6.21 
.54 
5.05 
1.34 
.72 
6.51 
1.26 
8.21 
.93 
7.24 
9.21 
8.38 
6.40 
6.50 
2.39 
4.20 
5.17 
Woodburn 
4.44 
4.83 
Noblesville 
.89 
Pennville 
6.96 
Delphi 
3.57 
Fort Branch 
4.69 
6.21 
Shelby ville 
4.05 
Cannelton 
1.88 
Rockport 
3.47 
Average decrease from the 
use of star 
chy ears. . 
2.78 
5.57 
4.20 
1 Initial stand records were not made in these experiments. 
SUSCEPTIBILITY OF DISEASE-FREE SEED EARS. 
To determine the relative susceptibility to root rotting of the 
horny and starchy groups of seed, a field experiment was outlined 
in 1920 in which alternate rows were planted with kernels from 
selected horny and starchy disease-free ears of a single strain of 
Reid Yellow Dent. In the horny group most of the ears were classi- 
fied as type F. In the starchy group no ears less than half starchy 
(type C) were employed. This experiment was conducted at Bed- 
ford, IncL, and Avas duplicated in a fertilizer plat at Linden, Ind. 
The plats were each 1 acre in size. Owing to evident errors intro- 
duced by marked soil inequalities, the taking of notes was dis- 
