126 
Journal of Agricultural Research 
Vol. XI, No. 4 
Table III .—Type and variability of the two-ear strains of Indian corn —Continued 
upper-ear plot, crop op 1909 
Character and strain. 
Mean. 
Empir¬ 
ical 
mode. 
Standard devia¬ 
tion. 
Coefficient of varia¬ 
bility. 
Length of ear, in inches: 
Single ears. 
7. 775±o. 043 
8. 3251b . 062 
6. 512 ± . 097 
6 . 183 ± . 020 
5. 9761b . 028 
5- 373 ± -036 
7. 719^ .087 
7. 69 ± . 12 
4. 51 d= . 14 
17. 91 ± . 10 
l6. 76 ± . l6 
l6. 32 ± . l8 
8.0 
I. 085^0.030 
13. 96 ±0. 40 
Upper ears.. 
8. 5 
. 897 ± .043 
10. 77d= . 53 
Lower ears . 
6.5 
I. 349± .065 
20. 72 ± 1.10 
Circumference of ears, in 
inches: 
Sin He ears. 
6.0 
. $I2± . 014 
. 4o8db . 020 
8.42 ± . 24 
TTrmer ears. 
6.0 
6.83d: .34 
T/vwer ears. 
5-5 
8.0 
.4851b .025 
9.03d: .48 
Weight of ear, in ounces: 
Sin He ears. 
2. i66dz . 061 
28. o6dz .86 
TTrmer ears. 
8.0 
1. 622 ± . 084 
21. 09 d: 1. 10 
Lower ears . 
4.0 
1. 8iodb . 098 
40. nd:2. 50 
Rows of kernels on ears: 
Single ears . 
18.0 
2. 482 db .071 
13.861b .41 
TTnner ears. 
16.0 
2. 30 db . 11 
13* 7 2 ± * 72 
T/>wer ears . 
18. 0 
2. 41 ± . 13 
12.93 d: .80 
upper-ear plot, crop op 1910 
Length of ear, in inches: 
Single ears . 
7. 82o±o. 057 
8. 268 zb . 056 
6. 522 ± .079 
6. 376^ .019 
6 . 26od= . 025 
5. 784± . 032 
9- 57 ± • n 
8. 99 ± . 12 
6. 13 zb . 14 
17* 542 ± -091 
17. 26 ± . 14 
17* 3 1 ± • x 5 
9.0 
1. 592 ±0. 040 
20. 36zbo. 53 
Upper ears . 
8.0 
1. 021 zb . 040 
I2.35d: .48 
Lower ears . 
7.0 
6.5 
1. 364± .056 
20. 91 d: .89 
Circumference of ear, in 
inches: 
Single ears . 
. 52 6 ± .014 
8.25d= .22 
Upper ears. ... 
6.0 
. 459 ^ * olS 
7* 33 • 18 
Lower ears . 
5*5 
11.0 
. 529^ .023 
9.13d: .40 
Weight of ear, in ounces: 
Single ears . 
2. 957 ± .079 
30. 91 d: -9° 
Uooer ears . 
9.0 
2. 205 db . 087 
24. 5 ±1. 0 
Lower ears . 
6.0 
2.128 ± . 099 
34.7 ±1.8 
Rows of kernels on ear: 
Single ears . 
18.0 
2. 366 zb .064 
13- 49± * 37 
Upper ears. 
16. 0 
2. 54 ± . 10 
i4.73± .60 
Lower ears... 
16. 0 
2. 27 ± . 11 
13. 12 zb .64 
upper-ear plot, crop op 1911 
Length of ear, in inches: 
TTrmer ears. 
7- 537 ±°- 010 
S- 7*5± • 012 
7- 5 
1. 3i9dzO. 070 
17. sodzo. 94 
Lower ears. . 
6. 0 
1. 298 ± . 083 
22. 7izb . 13 
Circumference of ear, in 
inches: 
TTrmer ears . 
6. o66zb . 041 
6.0 
• 53S± • 02 9 
8. 82 db * 48 
Tower ears... 
5- 339 db . 049 
5 *o 
. 6o3± .035 
11. 29± . 67 
Weight of ear, in ounces: 
TT-rmer ears.. 
. 7.942 ± .01$ 
4. 716^ . 022 
9.0 
I. 941 ± .Oil 
24. 44± . 15 
Lower ears. .. 
3*° 
2. 031 d= .pi6 
43- io± . 40 
