432 
Journal of Agricultural Research 
Vol. XXI, No. 7 
IablF V. -Frequency distribution of ears of various circumferences in the progeny of 
smoothmedium-, and rough-dented types of Commercial White corn, 1916—igig 
Number of ears having a 
circumference (in inches) of — 
Num¬ 
ber 
of 
ears. 
Aver- 
Year and 
type. 
2 Ya 
2^ 
^Ya 
3 
i x A 
z x A 
SYa 
4 
4^ 
a x A 
4 Ya 
5 
sH 
sH 
5 Ya 
6 
tW a 
(> X A 
6 Ya 
7 Ya 
l x A 
7 Ya 
8 
8M 
age 
cir- 
cti in¬ 
fer¬ 
ence. 
1916: 
Smooth 
6 
11 
8 
34 
15 
13 
27 
30 
39 
50 
27 
54 
65 
80 
81 
36 
8 
Inches 
Medium 
7 
6 
6 
70 
504 
6. 21 
Rough.. 
is 
t6 
3 
1 
4 59 
6. 2 
1917: 
Smooth 
5 
* 
25 
74 
44 
39 
42 
4 
469 
490 
506 
6. .3. 
6. 22 
Medium 
3 1 
38 
48 
Rough.. 
1 
T 
v 
«3 
79 
27 
3 
(). 44 
6-57 
1918: 
40 
30 
7 
15 
53o 
Smooth 
4 
10 
17 
l6 
19 
23 
n 
54 
36 
26 
79 
54 
34 
140 
109 
87 
107 
119 
114 
108 
57 
54 
47 
23 
23 
40 
3 
6 
639 
565 
488 
Medium 
4 
3 
9 
13 
7 
5. 29 
Rough.. 
2 
3 
8 
7 
92 
12 
5- 59 
1919: 
5- 72 
Smooth 
Medium 
1 
I 
3 
1 
I 
10 
9 
12 
17 
38 
49 
93 
106 
156 
9i 
78 
26 
11 
705 
5- 79 
I 
1 
3 
1 
26 
34 
19 
99 
56 
66 
47 
132 
38 
Rough.. 
104 
143 
72 
4 
27 
f'4Q 
692 
5- 94 
Four-year 
90 
75 
12 
8 
1 
6. 21 
average: 
Smooth 
Medium 
5. nn 
Rough.. 
* 
1 
WEIGHT OF EARS 
The average weight of the seed ears of the three types used in planting 
varied but little after the first season. The data given in Table VI show 
that the smooth ears averaged slightly less than the medium, and the 
rough type slightly heavier. The differences are not entirely consistent 
and probably are not great enough to be considered significant. The 
data for the progeny as given in Table VII also show that there is but 
little difference in the average weight of the ears of the various lots. 
1 ABU3 VI. Frequency distribution of ears of various weights used in planting type 
test of Commercial White corn for 1916-1920 
Number of ears weighing (in grams)— 
Year and type. 
i 75 
to 
200. 
200 
to 
225. 
225 
to 
250. 
250 
to 
275 - 
275 
to 
300. 
300 
to 
325- 
325 
to 
350 . 
350 
to 
375 - 
375 
to 
400. 
400 
to 
425. 
425 
to 
450 - 
Num¬ 
ber of 
cars. 
Average 
weight. 
1916: « 
Smooth. 
Cm. 
Medium. 
Rough. 
1917: 
Smooth. 
I 
I 
6 
8 
10 
15 
6 
Medium. 
1 
7 
I 
40 
321 
Rough. 
y 
11 
3 
I 
40 
33° 
361 
1918: 
Smooth. 
I 
3 
4 
3 
7 
3 
7 
9 
10 
3 
7 
3 
2 
40 
26 
Medium. 
I 
3 
5 
7 
5 
7 
12 
a 
O 
c 
* 
306 
Rough. 
2 
2 
3 
4 
A 
3 
I 
33 
28 
3 i 3 
1919: 
Smooth. 
4 
6 
3 
3 00 
Medium. 
4 
7 
4 
2 
1 
I 
x 
20 
250 
Rough. 
2 
2 
3 
6 
4 
2 
I 
20 
257 
260 
1920: 
Smooth. 
7 
13 
6 
6 
6 
A 
Medium. 
1 
3 
11 
11 
4 
6 
3 
2 
1 
40 
286 
Rough. 
1 
1 
3 
5 
13 
9 
5 
40 
295 
Five-year aver¬ 
age: 
Smooth. 
0 
40 
295 
Medium. 
290. 9 
Rough. 
299 . 0 
304.2 
a No data. 
