SINGLE-STALK COTTON CULTURE AT SAN ANTONIO. iby. 
point is illustrated further in Plate VI, figures 1 and 2, which pre- 
sent yields from rows in wide-spaced and _ single-stalk blocks, 
respectively. 
General observations made throughout the season, comparing the 
development of single-stalk and wide-spaced rows, showed how the 
above conditions might be accounted for. Plants in the single-stalk 
rows seemed sooner to take advantage of any inter-row or inter-plant 
soil space and to more readily utilize the available soil moisture. On 
this account plants in single-stalk rows may have gained an advantage 
over adjoining wide-spaced rows early in the season and to a degree 
have invaded the soil that would otherwise have been utilized by 
the wide-spaced rows. This advantage would be cumulative, and 
as the season progressed the plants in the single-stalk rows appeared 
to show distinct superiority in this respect. This may also account, 
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Fig. 3.—Diagram showing the yields from rows in wide-spaced and single-stalk blocks of Acala cotton in 
section B, San Antonio, Tex., 1914. Wide-spaced rows are represented by double lines, single-stalk 
rows by heavy lines. 
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POW NUMBERS 
for the greater differences in the yields obtained from the alternate 
rows of section A. 
Because of the effect of single-stalk rows on wide-spaced rows 
throughout the test, it is necessary to compare tle inside rows of the 
4-row blocks of section B in order to learn the differences that might 
be expected if the planting had been made upon a field basis. 
It is found by doing this that the inside rows of single-stalk blocks 
yielded from 15 to 60 per cent more seed cotton than the inside 
rows of the wide-spaced blocks. The average difference is 47.7 per 
cent. 
