42 BULLETIN 1473, U. S. DEPARTMENT OF AGRICULTURE 
TABLE 19.—Number of hills, skips over 2 feet long, injured plants, plants per 
Be row, and bolls matured in each row of cotton in a chopped plot at Green- 
ville, Tex. 
Section 1 | Section 2 
f { 
Row No. |Skips2] In- | mota; | Ma- Skips2} In- | ota) | Ma- 
Hills | feet | jured iants tured | Hills | feet | jured ie a’ | tured 
| long | plants! Dp bolls long | plants plants bolls 
| eee | 
jee ws eee eS 82 7 0 133 | 244 | 70 6 2 104 199 
Ott SHeS EN aan 59 14 2 | 80 | 194 80 9 6 135 233 
Eee tabs Ge qeah: Va | 81 8 ey 232 78 8 3 115 191 
AS) ens Ue Eee | 64 16 2 | 82 199 | 97 5 17 179 246 
piace Wega rene. “8 56 16 6 | 91 213 | 62 8 0 74 171 
Glen a a eee 75 | 9 a 95 244 | 7 6 7 169 261 
| eee ee alee | 76 5 | 3 | 94 225 | 78 6 6 114 | 200 
Gasser a 54 13 | 2 72 196 | 84 6 8 145 | 227 
Qik aby SRR EAE & 79 6 2! 160 269 | 63 ll 4 80 172 
10 te ee 79 6 6: ee 120 246 | 81 7 3 145 193 
UH Ee ERS NE | 83 51 17 123 260 | 74 5 1 119 187 
| eee Onl eat tener) 62 9 2 $9 217 73 11 7 131 215 
{QNre Se eee 75 8 4 106 255 69 6 3 98 181 
[45k ECR SEIS] 71 | 11 0 95 194 | 84 8 38 193 270 
AGE aes Rees 83 3 6; 158 267 | 64 11 | 8 99 178 
16.2 i 22 eth ae seid Ol pate 21 SRS | 188 | 74 7 5 165 258 
7 giles Deals lige oan. 2 Bes mea7 B18. |. ce e7e 8 | 3 97 155 
1BSS ee ee | 54 | 14 1] 75 | 193 | 93 3 | 4 183 245 
1Qccssi eo cree pee 73 | 5 3 145 | 973 | «58 13 5 167 
DOO ae ook Seo es 69 | 10 1 104 | 228 | 63 15 1 84 201 
RELATION OF SPACING TO FLOWER PRODUCTION 
A greater production of flowers undoubtedly is one of the factors of 
increased yields in close spacings. The records of flowering were 
obtained by making daily counts of the flowers in rows of different 
spacings, beginning with the appearance of the first flowers and con- 
tinuing until after the peak of flowering was passed. The production 
of flowers in the different spacings has usually shown the same gen- 
eral effects of seasonal influences. When more flowers were produced 
in one spacing, the same tendency appeared in other spacings. 
A comparison of rows in which single plants were spaced 12 inches 
apart with spacings of less than this distance showed that more flowers 
were produced in the closer spacing until the peak of flowering was 
reached. The flower production usually declines more abruptly in 
the closer spacings than in the 12-inch spacing after the peak of pro- 
duction has been passed. The widest differences in flower counts 
were between the unthinned rows and the rows in which single plants 
were spaced 12 inches apart. 
The rate of flower production in 1925 is shown graphically for four 
experiments in Figure 19, which includes four separate comparisons 
of different spacings. Single plants at 12 inches were used as the 
basis of the experiments, and the comparisons were made with twe 
plants at 12 inches, three plants at 12 inches, plants blocked out in 
clumps, and with unthinned rows. The diagrams show the rate 
of flowering, with the records for the rows with single plants in broken 
lines and the rows of the closer spacings in solid lines. In each case 
the solid lines are above the broken lines until after the peak of flow- 
ering, when the solid lines fall below the broken lines. As boll weevils 
were not present in the 1925 comparisons, flower production contin- 
ued in the wider spacings after the close spacings had practically 
ceased producing flowers. 
