944 
Journal of Agricultural Research 
Vol. XXni, No. xa 
responsible for the larger yields in series I. For reasons already explained 
the comparatively poor showing of the “ heavy ” border C1-5 was 
ascribed to overirrigation and resultant checking of the plants. The 
yields per border of series II are not significantly different. In series III 
the yields of the “heavy” and “medium-heavy” borders are almost the 
same, but considerably more than that of the “ normal ” border. Hence it 
is believed that the heterogeneity of the soil of the borders used for the 
experiment was responsible for the fluctuations rather than the varying 
irrigation treatments. 
From the evidence obtained by a comparison of the yields of all the 
borders, and making allowances for the “heavy” border C1-5, it may be 
stated that the “normal” irrigation produced, on the average, about 30 
pounds less seed cotton per border than either the “medium-heavy” or 
‘ 4 heavy” irrigation, but that between the latter two no differences 
developed. This lower average yield of the “normal” borders indicates 
that this treatment may be underirrigation. In previous seasons one of 
the “normal” borders, Ci-12, had yielded better than Ci-13 and Ci-14. 
Table IX .—Pounds of seed cotton per border and pounds per row for each picking 
Border. 
Row 
First 
picking. 
Sept. 17 . 
Second 
pickixig, 
Oct. 14 . 
Third 
picking, 
Nov. 15 . 
Fourth 
picking, 
Dec. 8 . 
Total. 
Plants 
per row. 
Plants 
with veg¬ 
etative 
branches. 
C1-3, “Normal”. 
I 
7* 3 
16.8 
14.4 
6. I 
44- 6 
240 
96 
2 
10. 1 
23-3 
16.5 
6. 1 
56.0 
256 
112 
3 
9-5 
18. 2 
IS. * 
6-3 
49- 1 
241 
109 
4 
8-3 
16. 0 
I 5- 5 
7- 1 
46.9 
207 
79 
5 
7-3 
x 7* 3 
14. 8 
8.4 
47-8 
283 
in 
6 
8.0 
14. 6 
x8. 7 
8 -3 
49.6 
181 
70 
7 
6.9 
17. 2 
IS-2 
7-3 
46. 6 
245 
98 
Total. 
57-4 
123.4 
j no. 2 
49- 6 
340.6 
1.653 
67s 
C1-4, ‘ ‘ Medium-heavy ’ ’. 
1 
5 -o 
14.4 
18. 2 
7-3 
44.9 
287 
100 
2 
8.6 
20. 5 
21. 0 
10. 1 
60. 2 
218 
82 
3 
9. 1 
18.8 
21. 0 
n. 8 
60. 7 
258 
9i 
4 
8. 1 
25.6 
20. 0 
n. 1 
64. 8 
224 
114 
5 
7-4 
18. 0 
19. 0 
10. 9 
55-3 
296 
97 
6 
6. 0 
14. 8 
21. 0 
12. 8 
54- 6 
239 
118 
7 
6.4 
16. 2 
20. 0 
9.6 
52. 2 
253 
,88 
Total... 
50.6 
128.3 
140. 2 
73-6 
392.7 
h775 
609 
C1-5, “Heavy”. 
1 
4.4 
10. 7 
16. 0 
6. 2 
37-3 
210 
57 
2 
5-o 
14.7 
18. 0 
8. 0 
45-7 
292 
90 
3 
5-o 
12.3 
16. 0 
6-5 
39-7 
231 
92 
4 
5 * 1 
12. 1 
15.0 
5-9 
38.1 
250 
59 
5 
4. 6 
12. 8 
14. 0 
5-6 
37*0 
239 
85 
6 
9.1 
16. 9 
17. 0 
6. 7 
49- 7 
239 
78 
7 
4.2 
10.9 
12. 0 
5-3 
32.9 
' 285 
79 
Total. 
37- 4 
9 a 3 
108. 0 
44- 7 
280. 4 
1, 746 
540 
C1-9, “Normal”. 
1 
I * 9 
x 5* 1 
12. 0 
(TeT 
35-6 
255 
92 
2 
3-2 
17.1 
i5-0 
6.8 
42. I 
256 
74 
3 
4.9 
14*9 
14. 0 
6.4 
40. 2 
232 
86 
4 
3-5 
*5- 9 
14. 0 
8 . i 
41.5 
3i7 
72 
5 
3 -1 
16.5 
12. 0 
7.0 
38.6 
235 
78 
6 
4. 0 
15.0 
9.0 
4.7 
32.7 
264 
58 
7 
4- 5 
16. 0 
12. 0 
4.3 
36.8 
260 
67 
Total. 
25- 1 
no. 5 
88.0 
43-9 
267.5 
1,819 
S 2 7 
