iS BULLETIN 1473, U. S. DEPARTMENT OF AGRICULTURE 
Tasie 7.—Comparative yields in cotion-s pacing experiment with chopped and un- 
thinned rows, Greenville, Tex., 19283—Continued 
Section 3 Section 4 
| 
| ell | Yield of seed cotton Yield of seed cotton 
a et eS ; Row | (pounds) (pounds) 
opacing 1 ONE ose | 
Seah | No. | Num- | Num- 
ber of | | _ ber of | 
plants | First | Second | plants; First | Second 
| pick- | pick- | Total | pick- | pick- | Total 
| Ing | -ing | | avers alba Gina tee 
| | 
= | | | | | 
1 307 | 4.0) 21 G/L ios De2r ps = Tasgale aeo-3 6.1 
2 S520) AG) eo 8 6.8 506 | 511 26 U7 
Unthinned (block 5}_-________ 3 530 | AST 2.0 6.7 246 4.3 | 1.8 + 6.1 
| 4 543. | 5.0 1.6 6.6 461 4.6 2.1 6.7 
5 417| 4.4 2.1 6.5 382 4.8 2.5 7.3 
Totals, sie we 8s wee be ITS D349 fo! 29TH 310.0 fig 3-75) 1, B40. laa O2-Ga) eetiss 33.9 
Jald cs 180 bas! 4423. |e a>, |e eee ee isa eater ete | [amen 
: 2 Fi Pao 25 fal 188 4.1 2.4 6.5 
Chopped (block 6)____.______- 3 182| 40 2.8 6.8} 199 4.8 A 7.5 
| 46 188 be ALONG 29 |e CO laa la A eh Oe 7.0 
pr Sa one Ze 6.4 179 4.1 IA hee Ges 
Rotals <= dena urea Mae owe 052 | 20.6] 13.1| 33.7 OW bel ee be Sa. 34.3 
f>1q24 360 ihe 8 feta. te was 64) a voneakacnia Su anrnInG 6.4 
i} 2! 494 4.8 1.9 6.7 553 5.2 2.5 ee 
Unthinned (block 7)__-_------ 3| 466 4.3 1.9 6.2 284; 4.2 16} 5.8 
4). G47 O56 fi. toe | areal ben | eON meet 8.3 
NGG at wapkate 2.0 6.5 285 4.3 2.1 6.4 
Motales ters Ua enn a eae 2,324 | 923.5 9.7! 33.2] 1,947] 245] 10.1 34. 6 
| {aaa a oee | ieee lua ieee minauon oe 
2} 195} 4.3 STi tian tes 185 | 4.6 Date ee 
Chopped (block 8)_-....-.---- Bi | i220 1k AsG: en sass hares 202| 5.3 ee ey 
eigen foe al age CO rem acy 78a | ves SHG tn otiGas 
5 i71| 4.9 Ba) Peis 185| 5.1 236 [= 127 
Total tes sae eee | Sosy aaes | Serena t30 929 | 24.0] 12.0 | 36.0 
This experiment was harvested in four sections, giving 12 block 
comparisons between the two spacings. In 9 of the 12 comparisons 
the inside rows of the chopped blocks gave the highest yields. The 
increase in yield of one spacing over the other is usually small, and 
the differences are probably due to chance. 
Comparing yields in pounds of seed cotton from the three inside 
rows of each block, the chopped rows show a mean difference of 0.517 
+0.216 pound over the unthinned rows. This difference is only 2.39 
_times its probable error and is not significant. As there was prac- 
tically no difference in yield between the chopped rows and the un- 
thinned rows, the real difference appears to be in the cost of the 
chopping. 
COMPARISON OF CHOPPED AND UNTHINNED ROWS AT CAMPBELL, TEX, 
An experiment comparing chopped and unthinned rows was made 
on the farm of L. C. Cooper, near Campbell, on fine sandy loam soil. 
The choppers were instructed to chop out the rows to one or two 
stalks to the hill, leaving the hills about 12 inches apart. Hight- 
inch hoes were used and, as is usually the case where thinning is 
