COTTON-SPACING EXPERIMENTS | e197. 
OMPARISON OF CHOPPED AND UNTHINNED ROWS 
In another experiment, chopped rows in which one or two plants 
were left in hills from 12 to 15 inches apart were compared with 
rows left unthinned. (Table 7 and fig. 7.) . 
There is little difference in the yields from the two spacings. 
A few rows show rather wide fluctuation, but on the whole the yields 
from both spacings are fairly uniform. The most noticeable differ- 
ence in yields in this test is the low yields in the first picking of sec- 
tion 1. The soil in this section was a little heavier and not so rolling 
as the remaining three sections, which may account for the difference. 
In the second picking, however, the yields were largest from this sec- 
tion. Another notable feature in regard to row yields is the unusu- 
ally high yield from the second row of the first block of unthinned 
rows in section 2. A reason for the high yield in this row is found 
in that it had 145 more plants than the first row and 107 more plants 
than the third row. The low number of plants in the adjoining rows 
gave the advantage to the row with the greater number of plants. 
The relation of the row yields from the different spacings are shown 
in Figure 7. 
TABLE 7.—Comparative yields in cotton-spacing experiment with chopped and un- 
thinned rows, Greenville, Tex., 1923 
[The rows in the four sections were 150 feet long and were planted Apr. i3 and chopped May 28 (when 
the plants were about 5 inches high and bearing four or five true leaves). The first picking was Aug. 
18 and the second one Sept. 22! 
Section 1 Section 2 
Fy | Yield seed ene | Yield of seed cotton 
Cua | Row pounds (pounds) 
PP AGe _No. | Num- Num- | 
| ber of ber of | 
plants | First | Second plants | First Second 
} pick- | pick- | Total | pick- | pick- | Total 
| ing ing ing | ing 
1 347 3.3 4.8 8.1 Mi CUT 301 ge 
Hi 390 3.4 4.2 7.6 432 5.4 4.9 10.3 
Unthinned (block 1)____------ 3 337 3.8 4.3 8.1 325 4.1 2.8 6.9 
4 352 3.3 4.8 8.1 425 Beth 8. 4 
5 SOL | 5 eG hel 9.3 S030) Se aod ag 7.3 
Bite Gaile Oe tee fe ci OOl pu Nee esol gain ie 1.862 ley ee 9") 7 40.1 
eit 50)| Nae se ae (nae ey alleze0) pis czes| LO 1a Sacaulee ue 
2 239 3.9 4.8 8.7 B50 |. rds Ht SRO 8.2 
Chopped (block 2)________---- 3 201 2.8 4.9 qT 20ahly  aAeer| sass 8.2 
| 4 228 3.4 4.8 8.2 DOO pede ae aaa 7.5 
5 109 | 2"9 4,1 7.0 217 Al er sili | 7.2 
oper eens OF Bene tal hoityre bial /il baba). ects Rhye Werder cae ea 
—— ES SS | ES —_——<———_—_ —————_ -—-—-—_—— — ---————_ 
fy eat 3.1 4.8 7.9 393 | 4.9 2.8 | cha 
P| LESS tela PAO 4.8 ray 467 Avg D5 Tee: 
Unthinned (block 3)_____.-_-- 3 | 475 4,2 | 4.0 8.2 430 4.8 | 2 7/ ao 
4 425 3.4 4.1 7.5 618 ig pa ae hy 7.4 
5 | 375 33 41 7.4 384 4.2 2.8 7.0 
Motley See En {990-3 16, Oi fo1.8 44 BB¥7|'-9,299"| sa3gr4 les aae5 36.9 
[ef Ponte lho) Gt | Wear |S pgual ee Eigse penals: | ittong 6.9 
2 |<) 245 2.9 £58 |e ese 226 || 4.8] 2.9 meri 
Chopped (block 4) ____-___-_-- Bal geal OS ai) ae8 4.7 8.5 HAS ae7, | O87 7.4 
4! 200 35) avg | i S2 193M e 4e2 eess0 7.2 
5 | 185 3.3 a5\ 7.8 176) 44) Sat 7.5 
Pntaleiiee 2h alt | 991 | 15 23.1 | 39.0 9744). (99-41 gag 36.7 
2 
0 
Padi 2 
