136 Nebraska Agricultural Exp. Station , Research Bui. 20 
medium starchy, and starchy grain had respectively 59, 58, and 
52 per cent disease-free kernels, while 16, 16, and 22 per cent of 
their kernels respectively were diseased and rotting. 
Of the ears with horny, medium, and starchy grain, 14, 13, 
and 9 per cent respectively had no diseased kernels, while 5, 7, 
and 15 per cent respectively had all kernels diseased. A slight 
correlation between starchiness and disease indication is ap- 
parent. 
Classified according to depth of kernel, ears with shallow, 
medium, and deep grain had respectively 58, 60, and 53 per cent 
disease free kernels, while 19, 15, and 19 per cent of their ker- 
nels respectively were diseased and rotting. 
Of the ears having shallow, medium, and deep grain, 15, 17, 
and 10 per cent respectively had no diseased kernels, while 6, 6, 
and 11 per cent respectively had all kernels diseased. Ears with 
deep kernels appear to be relatively most subject to disease. 
Classified according to ear diameter, ears with large, medium, 
and small diameter had respectively 53, 59, and 64 per cent of their 
kernels disease free, while 20, 15, and 12 per cent of their kernels 
respectively were diseased and rotting. 
Of the ears with large, medium, and small diameters, 12, 15, 
and 17 per cent respectively had no diseased grain, while 10, 6, 
and 2 per cent respectively had all their kernels diseased. Large 
ear circumference appears to be somewhat correlated with the 
disease indication of the germinator test. 
While there appears to be no reliable correlation between any 
of the ear characters and the presence of root-rot disease, it 
seems that the selection of smooth, slender ears having a sound 
natural colored shank and bright vitreous kernels of only 
medium depth will materially reduce its presence. 
RELATIVE YIELD PERFORMANCE OF DISEASED AND DISEASE FREE CORN AS 
DETERMINED BY THE GERMINATOR TEST 
In 1921, yield tests were made of the comparative perform- 
ance in the field of badly diseased and disease free ears of 
Hogue’s Yellow Dent and Nebraska White Prize corn as deter- 
mined by the preceding germinator tests. Seventy disease free 
Ilogue’s Yellow Dent ears were compared with the 59 most 
diseased ears of the same variety in duplicate ear-to-row plats 
44 hills in length. Duplicate 4-row plats were also planted 
from composite seed of these diseased and disease free ears re- 
spectively. Similar tests were made for Nebraska White Prize, 
comparing 40 disease free ears with the 40 most diseased ears. 
