Feb. 24,1923 
Early Vigor , Yield , and Diseases of Maize 
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Fig. 19.—Graphic illustration of the total yield and yield of marketable and unmarketable corn (in 
‘ 6 of si 
bushels per acre) produced by a selected composite < 
(Taken from Table XXVII.) 
i Susceptible seed and by nearly disease-free seed. 
Table XXIX .—Influence of an early date, two intermediate dates, and a late date of 
planting of moderately diseased and nearly disease-free seed on early vigor and yield. 
Reid Yellow Dent grown on infested soil of high fertility. Urbana, III., in IQ2I 
Early-vigor data. 
Yield data. 
Time of 
plant¬ 
ing. 
Condition of 
seed. 
Total 
stand. 
Vigorous 
plants. 
Weak 
plants. 
6 
ct 
l 
I 
i§ 
4) . 
Market¬ 
able 
ears. 
Rotted 
ears and 
rotted 
nub¬ 
bins. 
Chaffy 
ears and 
chaffy 
nub¬ 
bins. 
Sound 
nub¬ 
bins. 
Number. 
Per cent. 
Number. 
| Per cent. 
Number. 
j Per cent. 
1 
I 
US, 
a 
Number. 
Per cent. 
Number. 
Per cent. 
Number. 
Per cent. 
Number. 
i 
Per cent. 
May 2 - 
Moderately dis¬ 
eased. 
1,464 
86.8 
352 
21.6 
681 
39* 1 
Bus. 
90.9 
Bus. 
73*4 
902 
67. 2 
174 
13* 0 
130 
9* 7 
136 
10.1 
Nearly disease- 
free. 
1. 599 
95- 2 
914 
58.1 
123 
6.* 4 
100. 7 
89.6 
X, no 
76.1 
114 
7.8 
80 
5* 5 
154 
10. 6 
10 
Moderately dis¬ 
eased. 
1,448 
85-7 
385 
24.9 
513 
28.2 
86.3 
69.4 
790 
64*3 
170 
13*9 
128 
10. 4 
140 
xi. 4 
Nearly disease- 
free. 
1,626 
96.4 
1,362 
81.1 
88 
5*o 
99.8 
8s. 2 
X, 022 
72.3 
138 
9*8 
128 
90. 5 
126 
8.9 
20 
Moderately dis¬ 
eased. 
1,477 
88.7 
578 
34*2 
4x0 
2X. 5 
77.0 
57*4 
746 
58.1 
190 
14. 8 
170 
13* 2 
178 
13*9 
Nearly ;disease- 
free. 
x, 593 
94.8 
1,028 
61. s 
2ix 
13.5 
90. 5 
79.1 
x, 004 
73* 2 
128 
9*3 
96 
7.0 
144 
10. s 
31 
Moderately dis¬ 
eased. 
x, 691 
88.2 
496 
25.8 
452 
23*9 
79.0 
55*9 
860 
61. 4 
X92 
13* 7 
222 
15*9 
126 
9.0 
Nearly disease- 
free. 
l» 784 
92.9 
X, 199 
65.5 
55 
2.9 
89.9 
76. 6 
x, 144 
72.9 
166 
xo. 6 
1x4 
7*3 
144 
9.2 
