J. Clif Boykin1, Derek P. Whitelock2, Michael D. Buser3, Carlos B. Armijo4, Greg A. Holt5, Thomas D. Valco6, Dennis S. Findley7, Edward M. Barnes8, and Michael D. Watson8. (1) USDA, ARS, Cotton Ginning Lab, 111 Experiment Station Rd., Stoneville, MS 38776, (2) USDA-ARS, Southwestern Cotton Ginning Research Laboratory, PO Box 578, 300 E. College Dr., Las Cruces, NM 88047, (3) USDA-ARS Cotton Production and Processing Research Unit, 1604 E. FM 1294, Lubbock, TX 79403, (4) USDA-ARS Southwestern Cotton Ginning Research Laboratory, PO Box 578, Mesilla Park, NM 88047, (5) USDA-ARS, Rt.3 Box 215, Lubbock, TX 79403, (6) USDA, ARS, 141 Experiment Station Rd., P.O. Box 40, Stoneville, MS 38776, (7) Southeastern Cotton Ginners Assn., 139 Prominence Court, Suite 110, Dawsonville, GA 30534, (8) Cotton Incorporated, 6399 Weston Parkway, Cary, NC 27513
Comparison of five small-scale laboratory gins to seven commercial gins sampled across the cotton belt
Seed cotton was collected from 7 commercial gins (5 reps per gin) and processed with 5 lab gin stands for comparison. Fiber measurements were determined with the AFIS and analyzed statistically to study the effects of “gin” and “lab gin”. Data from the hand gin, commercial gin stand, and commercial lint cleaner were included in the comparison for a total of 8 “lab gins”. All properties differed between lab gins. All properties differed between the 7 gins sampled, and for each property there was a significant interaction between gin and lab gin with p-values<0.01. The significant interaction indicated that differences among gins depended on which “lab gin” data set was used for comparison. Or, differences among “lab gins” depended on which gin was analyzed. The general implication of this finding is that cotton ginned with laboratory gins may not be adequate to predict differences in cotton ginned with commercial gins. Since this is a general comment about all lab gins, individual lab gins were compared to the commercial gin. This analysis indicated that results from certain lab gins were closer to results from commercial gins.
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