The spinning quality of Acala 1517 cotton and factors affecting it

              NEW HEIICC COLLEGE CF AGRICULTURE A,"D LEQEATIC -\R$£1
AND AGRICULTURAL SSPERE-ZiMT STATIC-^,
Press Bulletin 994
THE SPINNING QUALITY OF ACALA 1517 COTTON AND FACTORS' AFFECTING ]
Acala 1517 has attained a reputation of being c.  very good spinning v.?.i
.cotton. To date, 21 spinning tests h,\vs been conducted on this variety fr<
grown in various localities. Since this variety and a sir.iilar type, Acala
.stitute the bulk of Navr Mexico's crop, a study of factors affecting its spi
quality should be of interest.
The attached table shows the origin of the 21 samples, the year grown,
of 22s 5-arn, end the foLLov.dng determinations nhieh were ree.de on the Teat;
of the 21 sampless staple length, tensile strength, mature fib3rs, fineness
per inch), and neps per 100 square inches of card mesh. The equivalent st,
length is also reported. This character is another method of expressing r:
spinning tests and is nr.t used in the study.
It may be noted that when Acala 1517 has been grown in other regions,
in general, spun much better than when grovm in New Mexico. Time euphasiz.
great need of experimental work in Now Mexico bo determine factors, enviror
cultural, which affect the spinning quality of cotton.
Correlations of the various fiber properties aid strength of 22s yarn
calculated. These are as follows:
. 1. Classer's length (32ds in.) and strength of 22s yarn      —,
2..Fiber tensile strength and strength of 22s yarn +.
3. Fiber maturity and strength of 22s yarn +.
jf 4. Fiber fineness (wt,- per inch) and strength of 22s yarn     —,
5. Neps per 100 sq, in. of card mesh and strength of 22s yarn  -.
6. Classer's length and fiber tensile strength -.
While the populations entering into thes
noted that two correlations significant to th
fiber tensile strength and strength of 22s ya
classer's length.
Within limits imposed by this small popu
most important of the characters studied in a
length within this variety seems of little is:.
Fiber fineness also seems of little importanc
that the measure of fineness used (fiber weig
that in this determination the characters fin
cannot be separated..
It also appears that as growth conditions are such as to reduce classed
length, fiber strength is increased.
Scatter diagrams showing the relationship of three of the most interest:
characters are attached.
Summary and Conclusions.—The data indicate the great importance of j:c;o.
studies in New Jue:iico to determine environmental and cultural factors affect"
spinning quality 'of cotton grown in the State.
Significant correlations between fiber tensile strength and yarn strengi
\d classer':; length were obtained. The lack of corr:
between yarn strength and classer's length is worth;
The average spinning quality of Acala 1517 cotton indicates that the fit
this variety is considerably above the average in this respect. Th: sariel.s^ V
average staple length of 34.3 32ds of an inch, but produced yarn strength tut
lent of an average 39.1 32ds-inch cotton.
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