Oct. 22, 1917 Indirect Effects of Selections in Breeding Indian Corn 143 
Table V .—Type and variability of high- and low-ear strains of Indian corn —Continued 
crop of 1910 
Character and strain. 
Mean. 
Empir¬ 
ical 
mode. 
Standard devia¬ 
tion. 
Coefficient of varia¬ 
bility. 
Length of ear, in inches: 
High ears. 
6. 844^:0. 027 
7.0 
1. 064 ±0. 019 
15* 55 ±o. 29 
Low ears. 
Circumference of ear, in 
7. 152 ± .048 
8.0 
■ 978 ± .039 
13. 67 ± .24 
inches: 
High ears. 
6. 543 ± .013 
6. 5 
. 487± . 009 
7. 44± . 14 
Low ears. 
7. n8± . 012 
7.0 
. 481 ± .008 
6. j 6 ± . 12 
Weight of ear, in ounces: 
High ears. 
8. 516 ± . 060 
9.0 
2.281± . 042 
26. 77dt .53 
Low ears. 
Rows of kernels on ears: 
9 - 353 ± -°6i 
10. 0 
2 * 435 ± *043 
26. 03 ± .49 
High ears. 
18. 422 ;fc . 065 
18. 0 
2. 342 ± . 046 
12. 7i± . 25 
Low ears. 
19- 5oo± . 067 
20. O 
2. 546± . 048 
13. o6± . 25 
CROP OF 
I9II 
Length of ear, in inches: 
High ears. 
6.044 ±0.029 
6. 0 
1. 088±0.021 
17- 99 ±°- 37 
Low ears. 
Circumference of ear, in 
5 * 991 ± -024 
6 . 0 
i.i 33 =l= -017 
18.91 i .30 
inches: 
High ears. 
6 . i30± . 015 
6.25 
. 545 ± - on 
8.89^ .18 
Low ears.;. 
6. 3i7± .013 
6-5 
.588± . 009 
9 - 3 1 ± -15 
Weight of ear, in ounces: 
High ears. 
6.488 ± .057 
6. 0 
1. 892 i .041 
29. i6d= . 68 
Low ears.. 
Rows of kernels on ears: 
5 - 9 i 3 ‘± -045 
6. 0 
1.8oo± . 032 
30. 44 ± • 58 
High ears. 
17- 3 °^^ *087 
16. 0 
2. 437 ± .062 
i4-o8± .36 
Low ears. 
18. 5iodh . 074 
18. 0 
2. 546± . 053 
i 3 - 75 ± -29 
CROP OF 1912 
Length of ear, in inches: 
High ears. 
6 . 898 ±0. 031 
7-5 
1. 035^0. 022 
15- oodzo. 33 
Low ears. 
Circumference of ear, in 
7 - 396 ± .029 
7-5 
i* 052 i .021 
14. 22 ± . 29 
inches: 
High ears. 
6. 202± . 014 
6.5 
• 459 = 1 = *Oio 
7.40± . 16 
Low ears. 
6. 745^ . 014 
75 
. 5io± . 010 
7 * 56 ± • *6 
Weight of ear, in ounces: 
High ears. 
7. 609 dz . 062 
7.0 
1- 9 X 9 =±= .044 
25. 22 ± . 6l 
Low ears. 
Rows of kernels on ears: 
8. 428± . 060 
9.0 
2 .o 55 ± .043 
2 4 - 3 ^± • 55 
High ears. 
16. 5oo± . 071 
16.0 
2. 130^ . 051 
12. 91 i .32 
Low ears. 
19 - 459 ± -083 
18. 0 
2. 766± . 059 
i4-2ii .31 
