COTTON-SPACING EXPERIMENTS 25 
‘Tasie 11—Comparative yields in cotion-spacing experiment with 12-inch spacing 
and rows thinned by cross cultivation, Greenville, Tex., 1923 
ij The rows, which were 100 feet long, were planted Apr. 17 and thinned when the plants were about 344 
oo and bearing about four true leaves. The first picking was Aug. 24 and the second one 
Sep 
| z Yield of seed cotton (pounds) 
Spacing | No. | of | First Second 
plants, | picking | picking | Total 
| | 
|" | Fs Sa 
eee 214 | 3.0 1.8 | 4.8 
i a 244 3.4 2.0 | Bal 
3 | 253 | 3.2 1.9 | 5.1 
OSSICU ELV ALEC eee ere oe te a ee ee < 2 | ie nee a 5 
| | . . ° 
fom 232 3.1 2.0 | iat 
ear 214 | 2.9 | 2.3 5.2 
Bs | 207 Saal 274 5.8 
itis Peet Ree Ue Soe eee eee Fe oe Cele. () 1 933 24.3 17.6 41.9 
I 94 | 3.2 | 2.8 6.0 
ea 95 | 3.3 2.4 | 5.7 
| 3 | 85 | 2.8 2.6 | 5.4 
Gheppedsoplaniiches= +s 2 ut ee fe Ae a Ee ; | ao ae ze He 
6 | 88 Dia" | 2.7 | 5.4 
eG 80, 2.9 2.3 | 5.2 
| 8 | 78 | 2.3 2.3 4.6 
Rath ESR, ONY PE ee 699 24.0 20.0 44.0 
ae 282 | 3.3 | 2.6 5.9 
fre 218 | 3.4 2.5 5.7 
| 3) 230 | 3.4 | 2.2 5.6 
TOSSTC HIG YALE Gee eee ee ee a a { ; a oe oa = z 
[rg 188 | 2.8 2.4 5.2 
aie 256 | 3.6 2.0 5.6 
ees 220 | 2.9 | Ot: 5.0 
ALY REY Ls ee erg a a ae Ee ee io 26. 0 ESe3 44,3 
The development and fruiting habits of the plants in the cross- 
cultivated rows are shown in Plate 1, C. 
SPACING EXPERIMENTS IN 1924 
Two spacing experiments were conducted in 1924. A comparison 
of two plants every 12 inches with unthinned rows was made on the 
Houston clay soil of the Greenville station and a comparison of 
chopped rows with unthinned rows on fine sandy loam on the farm 
of L. C. Cooper, near Campbell. 
The season of 1924 was extremely dry, no rainfall of benefit to 
crops being recorded at Greenville from May 24 until September 9. 
Practically all the cotton produced in the 1924 experiments was made 
during this dry period. The plants were damaged by grasshoppers, 
aphids, and seedling disorders during the spring, but boll weevils were 
not present. 
These two experiments were planned to obtain a larger number of 
block comparisons and a larger number of individual row yields than 
were provided for in previous tests. The confidence that can be placed 
in yields from experiments of this kind should be associated with con- 
sistent behavior of row and block yields. The first requirement for 
showing differences of behavior is to get an adequate number of side- 
by-side block comparisons. These experiments give a larger number 
of comparisons and a larger number of individual row yields, which 
permit a more reliable interpretation of the data. 
