22 
BULLETIN 526, U. S. DEPARTMENT OF AGRICULTURE. 
Table XV shows that in each of the 15 instances single-stalk 
culture gave a greater yield than the old system, the total increase 
being 117 pounds, or 20 per cent. 
The Wright experiment. — Mr. W. I. Wright planted one-half bushel 
of Shnpkins cotton per acre on April 20. Owing to unfavorable 
weather, only a poor stand was obtained, and later the stand was 
further reduced by aphids, causing much leaf-curl. There were several 
short reaches in each row, however, where it was possible to apply 
single-stalk culture. It was believed that these places would affect 
the total yield of the rows to a degree which would indicate what 
might have been expected had it been possible to apply the method 
the full length of the rows. 
The old-method rows were thinned on May 25. when the plants were 
3 to 5 inches high and had 3 to 5 leaves. It was possible to space the 
plants in these rows about 18 inches apart with fair regularity. In 
the single-stalk rows, which were thinned on June 25, when the plants 
were about 10 inches high and had 6 to 8 leaves, the plants were 
spaced about 8 inches apart wherever the stand permitted. 
There were 16 rows in the experiment, each 408 yards long. In 10 
of these, comparisons were made in alternate rows; in the 6 remain- 
ing rows the comparison was made in adjoining blocks of 3 rows each. 
Two pickings were made. The yields obtained, as reported by Mr. 
Wright, are given in Table XVI. 
Table XVI. — Eoir yields obtained in a single-stalk culture experiment with cotton con- 
ducted in 1915 by TV. I. Wright, Ingold, N. C. 
Yield of seed cotton (pounds). 
Row. 
First picking. 
Single , Old 
stalk. I method. 
Second picking. 
Total. 
Single I Old Single Old 
stalk. method. stalk. method. 
Alternate rows: 
Xo. 1 211 
No. 2 177 
No. 3 177 
Xo. 4 151 
No. 5 179 
Adjoining blocks: 
No. 6 1 209 
No. 7 193 
Xo. 8 197 
Total I 1, 497 
Difference ! 150 
Increase per cent.., 11 
191 
158 
153 
146 
137 
187 
184 
1S8 
43 
1,341 
324 
37 
2o0 
44 
220 
51 
222 
50 
202 
32 
222 
37 
243 
41 
230 
33 
232 
325 
1.S21 
1 
149 
0.3 
9 
231 
202 
204 
190 
169 
224 
225 
221 
Table XVI shows that in each of the eight instances single-stalk 
culture yielded more cotton at the first picking, the total difference 
being 150 pounds, or 11 per cent. At the second picking the old 
method had a very slight, quite negligible, advantage. In total 
yield the single-stalk rows had an advantage of 9 per cent. The 
