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HVI Short Fiber Content Measurement

Lee Gibson


The USDA, AMS Cotton Program has been evaluating a short fiber (SF) measurement using the Zellweger-Uster HVI. In 1997, over 83,000 samples from our supervisory checklot program were measured for short fiber. Individual HVI lines differed in the short fiber test level. Zellweger-Uster modified the HVI program to include a short fiber calibration routine. The modified program was then evaluated in 1998 in four USDA Classing Offices (Macon, GA; Dumas, AR; Lubbock, TX and Visalia, CA.) along with the Quality Assurance unit located in Memphis, TN. The average reproducibility with a tolerance of 1.0 within office was 58% compared to 57% for between office. The average reproducibility with a tolerance of 1.5 within office was 76% compared to 74% for between office. The encouraging aspect of this year's study is that the level differences observed in the 1997 evaluation appear to have been corrected by the new calibration routine.

Reprinted from Proceedings of the 1999 Beltwide Cotton Conferences pp. 1406 - 1407
©National Cotton Council, Memphis TN

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Document last modified Monday, Jun 21 1999