EFFECTS OF SELECTION ON THE YIELD OF CORN. 5 
Table 1. — Yields of six successive generations of U. S. Selection No. 201 corn, its parent 
varieties, and later crosses between these varieties obtained at Burdette, Ark., in 1921. 
[Explanation— (l) Corrections to a full-stand basis were made only for rows having 18 plants or less and for 
which data are given in column 5. The data for these rows in columns 6 and 7 are on this corrected-stand 
basis. (2) The relative yields (column 7) were computed according to the formula piven in the text.] 
Seed planted. 
Number 
of 
plants. 
Yields per row (pounds). 
Field 
weight. 
Corrected-stand basis. 
Field row. 
Ear 
corn. 
Shelled grain (with 
12 per cent mois- 
ture). 
Actual. 
Relative. 
1 
2 
3 
4 
5 
6 
7 
No.l 
Sec. l (Series 1 and 6). 
No. 201, check 
Whatley 
20 
20 
19 
20 
16 
19 
15 
19 
17 
20 
20 
20 
20 
20 
19 
17 
20 
20 
19 
19 
20 
19 
17 
20 
19 
18 
19 
20 
20 
20 
20 
20 
20 
20 
20 
20 
18 
19 
20 
20 
19 
18 
19 
20 
19 
19 
20 
17 
20 
20 
20 
20 
20 
20 
19 
20 
19 
15 
19 
12.0 
18.0 
14.2 
15.7 
12.0 
19.2 
13.3 
12.8 
10.3 
13.3 
13.2 
13.3 
12.5 
13.9 
13.6 
13.8 
14.8 
18.7 
13.0 
16.8 
15.7 
17.6 
13.2 
20.0 
14.3 
12.0 
17.0 
11.0 
12.8 
10.5 
11.8 
10.0 
11.0 
12.7 
19.7 
16.5 
13.0 
14.4 
17.4 
13.4 
16.1 
11.4 
16.0 
12.4 
12.9 
12.0 
13.8 
10.4 
16.4 
13.8 
12.6 
14.3 
14.1 
14.4 
14.8 
IS. 6 
12.1 
12.7 
14.5 
9.8 
14.4 
11.4 
12.6 
12.4 
15.4 
14.1 
10.2 
9.9 
10.6 
10.6 
10.6 
10.2 
11.1 
11.1 
13.0 
12.0 
15.0 
10.5 
13.4 
12.7 
14.1 
12.6 
16.0 
11.7 
10.9 
13.6 
9.0 
10.6 
8.6 
9.4 
8.2 
9.0 
10.4 
15.8 
13.5 
11.8 
11.8 
14.2 
11.0 
13.0 
10.4 
12.9 
10.1 
10.4 
9.8 
11.2 
10.0 
13.4 
11.2 
10.4 
11.4 
11.6 
No. 2 
15.6 
No. 3 
do 
10.7 
No. 4 
...do .. 
12.6 
No. 5 
15.0 
17.7* 
11.3 
No. 6 
Whatley 
13.7 
No.7 
St. Charles White X Whatley 
Whatley 
14.0 
No. 8 
9.7 
No.9 
No. 201, Fi (1914 seed) 
12.1 
12.1 
No. 10 
Whatley 
11.8 
No. 11 
Whatley X St. Charles White 
Whatley 
12.7 
No. 12 
12.1 
No. 13 
No 201, F 2 
11.9 
No. 14 
Whatlev 
11.2 
No. 15 
No . 201 , F 3 
11.7 
No. 16 
Whatley 
16.2 
12.2 
No.17 
No. 201, F 4 
10.9 
No. 18 
Whatley 
15.3 
No. 19 
No. 201, F 6 
9.4 
No. 20 
Whatley 
13.2 
No. 21 
No . 201 , F 6 
11.7 
No. 22 
Whatley 
12.2 
No. 23 
No. 201, check 
15.5 
10.6 
No. 24 
Whatley 
13.6 
No. 25 
No. 201, check 
No. 26 
No. 201, F 3 ... 
13.3 
9.9 
No. 27 
Whatley 
13.9 
No. 28 
No. 201, F 3 
8.9 
No. 29 
St. Charles White 
12.3 
No. 30 
No. 201, F 3 
10.2 
No. 31 
St. Charles White X Whatley 
No.201,F 3 
No. 201, F, (1914 seed) 
No.201, F 8 
Whatlev X St. Charles White 
No.201,F 3 
do 
11.4 
No. 32 
10.2 
No. 33 
9.9 
No. 34 
9.6 
No. 35 
13. 5 
No. 36 
11.1 
No. 37 
14.4 
9.5 
No. 38 
do 
9.7 
No. 39 
No.201, P. 
No.201, F 3 
No.201, F., 
12.7 
No. 40 
9.2 
No. 41 
12.4 
No. 42 
No. 43 
No.201,F 3 
No.201, F 5 
No.201, F 8 
No.201, F 6 
No.201, F 3 
No. 201, check 
No.201, F 8 
No. 201, check 
Sec. 2 (Series 2 and 7). 
No. 201, check 
12.7 
9.2 
12. S 
No. 44 
9.9 
No. 45 
10.7 
No. 46 
9.9 
No. 47 

11.5 
12.2 
No. 49 
No.l 
No.2 
St. Charles White... 
10. 6 
No. 3 
Whatlev 
11.5 
No. 4 
St. Charles White. . 
11.9 
No. 5 
do 
11.9 11.1 
No. 6 
do 
12.2 1 10. S 
No.7 
St. Charles White X Whatley 
St. Charles White 
14.8 14.8 
No. 8 
10.0 ' 8.0 
No.9 
No. 201, Fi (1914 seed) 
16.9 
13.8 13.9 
No. 10 
St. Charles White | 
12.0 10.5 
