10 BULLETIN 1473, U. S. DEPARTMENT OF AGRICULTURE 
TABLE 4.—Comparative yields in cotton-spacing experiment with plantings in 
thinned and unthinned hills, Greenville, Tex., 1922 
[The rows in both sections were 150 feet long and were planted May 18, and thinned when the plants were’ 
bearing an average of six to seven true leaves] 
Section 1 Section 2 
Spacing! now, Yield of | vieta of 
* | Number seed Number seed 
| of plants} cotton | of plants! cotton 
(pounds) (pounds) 
1 72 z ; 68 4.1 
3 2 81 78 4,4 
Hillsthinned’ to stalk 2222 2222 ois eee ne 3 94 3.3 91 45 
4 68 4.1 73 wae 
pf C0) 22 a pea nae eter are ym a Ro ae pe ay 2 Ae ene eee 315 15. 4 310 | - 16. 6 
1 197 ag au 920 | 6.0 
: zs 2 5.5 216 Bye 
Hillstunthinned 2222022 eS a Ne ees 3 176 4.6 219 52 
4 141 4.7 189 5.3 
A Use) (etree Ae Ei ene ett IA ae IN Aa ee Sl a al aa Kee aS 746 20. 2 844 PT) 
3), ae) Bl 
; A 110 5. 0 
Hills thinned! tow stalks ee ene 3 74 3.3 92 4.3 
4 90 4,1 78 4.7 
A MB pe ie aL ead i Se 338) 16.1 [2 a7 18.3 
| j 
1 Hills averaged 21 inches apart. 
SPACING EXPERIMENTS IN 1923 
The yields obtained from the close-spaced plants in the 1921 and 
1922 experiments led to the undertaking of seven spacing experiments 
in 1923. In two ex- 
periments unthinned 
rows were compared 
with 6-inch and 12- 
-inch spacing. In two 
other experiments un- 
thinned rows were 
compared with 
chopped rows in 
which one or two 
plants were left in 
hills from:-12°> 645 
inches apart. Un- 
thinned, one plant 
at 12 inches, and 
‘“‘ blocked-out”’ rows 
were compared in 
one experiment. An 
PO}WOS FLA ROM” 
OWLS WLS PULSES Wuls hits Mécs  °Xperiment i which 
/PLANT UWTRIMED [PLANT = | PLANT UTED (PLANT §6i\\ls_ with several 
SECTION / SLCTION 2 stalks were compared 
Fig. 4.—Yields (in pounds) of seed cotton per row from comparison of : : : 
plantings in thinned and unthinned hills, Greenville, Tex., 1922 with hills thinned to 
one plant and a test 
comparing one stalk every 12 inches with rows thinned by cross 
cultivating completed the series. 
