136 
Journal of Agricultural Research 
Vol. XI, No. 4 
more variable than the declining, while the reverse is true for the remainder 
of the cases. The differences are in general of no significance. The same 
may be said in regard to the coefficients of variability, of which we pre¬ 
pared graphic representations but hesitate to take the space to exhibit 
them, since the conclusions drawn can be readily obtained from the 
values in Table IV. 
Table IV. Type and variability of the erect - and declining-ear strains of Indian corn 
CROP OP 1907 
Character and strain. 
Mean. 
Empir¬ 
ical 
mode. 
Standard devia¬ 
tion. 
Coefficient of varia¬ 
bility. 
Length of ear, in inches: 
Erect ears . 
Declining ears. 
7 - 9 2 5±o. 037 
7.9681b .053 
9.0 
1. 38o±o. 026 
x. 575 =*= -°37 
17-41 ±o -35 
* 9 - 77 ± • 5 ° 
Circumference of ears, in 
inches: 
9. 0 
Erect ears. 
Declining ears. 
6. 053 ± .014 
6 . 086 ± .020 
6. 0 
6*5 
• 5 T 9± -oio 
. 568± . 014 
8. 58 ± . 17 
9 - 33 ± -23 
Weight of ears, in ounces: 
Erect ears. 
Declining ears . 
9 - i 9 i± • °75 
8. 66o± . no 
10. 0 
A A 
2. 688 ± .053 
2.953^ .071 
29. 25± .64 
33. 98 ± .99 
Rows of kernels on ears: 
9. O 
Erect ears . 
Declining ears. 
i 3 - 9 * 8 ± .054 
14. 688dz . 072 
14. O 
I4. O 
1. 9ooi . 038 
i* 9 s 3 ± -052 
I 3 - 6 S± -28 
-35 
CROP OP 1908 
Length of ear, in inches: 
Erect ears. 
Declining ears. 
7.850^0.067 
7-183 ± . 031 
8.0 
H r\ 
1. 243 ±0. 024 
1. i09± . 022 
IS- 84±o. 31 
i 5 - 44 ± -31 
Circumference of ear, in 
7. O 
inches: 
Erect ears. 
Declining ears. 
5 * 9 °°=fc -014 
$-$n± .013 
6. 0 
5-5 
. 500± . OIO 
• 447 ± -009 
. 848 zb • 17 
8. iizb . 16 
Weight of ear, in ounces: 
Erect ears. 
Declining ears. 
8.128 zb . 067 
6. 485 zb .053 
8. 0 
6. 0 
2.132± . 047 
1. 803 ± .037 
26. 23 zb .62 
27. 8o± . 62 
Rows of kernels on ears: 
Erect ears. 
Declining ears. 
14- $6o± . 051 
14* 37°i • 056 
14. 0 
14. 0 
1. 7 S 4 ± -036 
1. 88ozb . 039 
12* 05db .25 
13. 08zb • 28 
CROP OP 1909 
Length of ear, in inches: 
Erect ears. 
Declining ears. 
Circumference of ear, in 
inches: 
Erect ears. 
Declining ears. 
Weight of ear, in ounces: 
Erect ears. 
Declining ears.. 
Rows of kernels on ears: 
Erect ears.. 
Declining ears. 
7. 366±o. 033 
8.0 
I. 246zbO. 023 
16. 92 zbo. 32 
7. 278± .034 
7.0 
I. 2981b . 024 
17. 83± .36 
5 - 9 IJ =t *°*3 
6. 0 
. 512 zb . 009 
.866± • 17 
5-647 zb .016 
5-5 
• 570zb . 012 
10. 09± . 20 
7.4421b .058 
8.0 
2. 186zb . 041 
29. 37zb . 60 
5- s 3 6 ± -056 
6. 0 
I. 916zb . 040 
32. 83± .75 
14-623 zb .053 
14. 0 
1. 9 2 7± -038 
13. 07zb . 26 
14- 429 ± *057 
14. 0 
1. 911 zb . 040 
13 - 2 4 zb .28 
