Interrelationships Among Five Cotton-Quality Factors, Including Fiber Strength 1/8-Inch vs. O Gauge, as Related to Yarn Strength at Three Staple-Length Levels

Excerpts from the report: The study was made in an effort to develop a comprehensive body of information that would be useful in pointing the way and providing a basis for making needed improvements in technical and statistical thinking, concepts, and procedures, whereby cotton fiber measurements and their evaluations may be made more objective, more reliable, and more meaningful in the future than they are at the present time. In particular, effort has been made in this study to diagnose and evaluate various interrelationships among certain fiber measures when applied to commercial cottons and to explain their contributing and complicating effects on conventional evaluations currently being made as to the relations of cotton fiber measures to yarn strength and to yarn appearance. Five factors of raw cotton quality, including the alternative fiber strength measures of 1/8-inch gauge and 0 gauge as determined by the Pressley flat-bundle test method, were used in parallel sets of multiple and simple correlation analyses with skein strength of 22s carded yarn, representing each of three series of American upland cottons of different staple-length levels, crop years 1954-57. The cottons originated from known varieties grown in their respective production areas of the U.S. Cotton Belt. The other quality factors included in the analyses were upper half mean length, length uniformity ratio, micronaire reading, and grade index.