Nov. 26, 1917 
Field Technic in Rod Row Tests 
409 
Table VI .—Results on yield of border rozvs of the same variety of barley due to differences 
in height of adjacent rows 
Average differences in height of adjacent rows. 
Num¬ 
ber of 
tests. 
Num¬ 
ber 
posi¬ 
tive. 
Num¬ 
ber 
nega¬ 
tive. 
Average 
differences 
in yield 
of border 
rows (in 
bushels, 
per acre). 
Cm. 
2 
2 
O 
4. 1 
2 
2 
0 
4. 8 
1. 7 
2 
2 
0 
2 
1 
3-3 
1. < 
18 .. . 
0 
2 
2 
O 
4 
2 
I 
1. 9 
7 
J 
7 
O 
4.9 
3. 5 
8 
i 
6 
2 
6 ... 
10 
8 
2 
2.1 
16 
11 
K 
— . 1 
\} * . 
Q 
7 
2 
+ .7 
7 
Similar results as presented for oats (Plant Breeding test) show a 
substantial agreement between the correlation coefficients calculated and 
results as obtained for the actual test of effects of certain specific height 
differences. These results are given in Table VII. 
Table VII .—Results on yield of border rows of the same variety of oats due to differences 
in the height of adjacent rows 
Average differences in height of adjacent rows. 
Num¬ 
ber of 
tests. 
Num¬ 
ber 
posi¬ 
tive. 
Num¬ 
ber 
nega- 
: tive. 
Average 
differences 
in yield 
of border 
rows (in 
bushels, 
per acre). 
to .. 
Inches. 
2 
2 
0 
9.8 
2 
1 
I 
1. 2 
2 
1 
I 
-4.8 
8 . 
2 
O 
2 
” 3-5 
3-3 
2. 0 
4 
2 
2 
6 . 
10 
6 
4 
13 
29 
34 
57 
67 
53 
0 
4 
1. 7 
16 
13 
13 
3 i 
3 ^ 
30 
2. 6 
21 
3-4 
— • 7 
2 6 
31 
23 
-1.8 
_ . 3 
The total minus (—) results for 1 to 12 inches difference in height are 
obtained by multiplying the average results by the number of tests and 
obtaining 2=177.1. The total plus ( + ) results are obtained in similar 
manner. 2 = 268.3. 
