oct. 22 ,1917 Indirect Effects of Selections in Breeding Indian Corn 137 
Table IV. —Type and variability of the erect- and declining-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: 
13. 85±o. 29 
Erect ears. 
7. 691^0. 031 
8. 0 
1. 065±0. 022 
Declining ears. 
7 - 35 °± • °35 
8. 0 
I. 143 ± • 024 
15- 55 ± .34 
Circumference of ear, in 
inches: 
Erect ears. 
6. i35± .013 
6. 0 
• 455 ± -009 
7. 42 ± • 16 
Declining ears. 
5. 79 6 ± • OI 5 
6. 0 
. 484± . on 
8. 35± . 18 
Weight of ear, in ounces: 
Erect ears.... 
8. 643 ± . 068 
9.0 
2. 2671b . 048 
26.231b . 59 
Declining ears. 
6. 5981b . 061 
7.0 
1.873d: .043 
28. 42 dt .71 
Rows of kernels on ears: 
Erect ears. 
14.3141k -05° 
14. 0 
1.6761b .035 
11. 7 X ± * 2 5 
Declining ears. 
14. 520i . 056 
14. 0 
1. 7 6 5 ± • ° 4 ° 
12. i6± . 28 
CROP OF 1911 
Length of ear, in inches: 
Erect ears. 
7.7081k 0.036 
8.5 
1. 4i8io. 026 
18.39 ±0.34 
Declining ears. 
6.9851b .036 
7-5 
I. 3I2± . 026 
18. 78 ± .38 
Circumference of ear, in 
inches: 
Erect ears. 
5.7851b .011 
5-75 
• 457 ± - oc8 
7 - 9 °± • 15 
Declining ears. 
5 - 575 ± • OI 5 
5 - 5 o 
. 5io± . 011 
9. i5± . 19 
Weight of ear, in ounces: 
Erect ears. 
7. 48o± .053 
8. 0 
1. 925± .038 
25 - 74 ± • 54 
Declining ears. 
6. 1541b . 069 
6. 0 
1. 700± . 049 
27. 62i -8l 
Rows of kernels on ears: 
Erect ears. 
14 - 538 ± ■ 049 
14. 0 
i.877± .035 
12. . 26 
Declining ears. 
14. 758± . 077 
14. 0 
1.900± .055 
12. 871b .36 
CROP OF 1912 
Length of ear, in inches: 
Erect ears. 
7. 821 ±0. 037 
8.5 
1. 379=bo. 021 
17.63^0. 29 
Declining ears. 
8.2941b .033 
9.0 
1. 3i4±o. 024 
15. 84± .29 
Circumference of ear, in 
inches: 
Erect ears. 
5. 998 ± . 010 
6. 0 
. 467 ±0. 007 
7. 79 ± . 12 
Declining ears. 
6. 220± . 012 
6. 0 
.479 ±0.009 
7. 7 °± . 15 
Weight of ear, in ounces: 
Erect ears. 
8. 255^ . 051 
9.0 
2. i35±o. 036 
25. 86± .47 
Declining ears. 
9. 436 ± .059 
9.0 
2. 2i8±o. 042 
23. 5i± .47 
Rows of kernels on ears: 
Erect ears. 
15- 5 o6 ± • °44 
14. 0 
1. 844 ±0. 031 
12. i5± . 20 
Declining ears. 
14. 546 ± . 048 
14. 0 
1. 845±0. 034 
12. 86± . 24 
