A modified saw-type gin stand differentially separates fiber from seed continuously by means of a motor-driven auger in the seedroll box (Columbus, 1987). The differential gin separates the fibers into three quality/length groups designated as left, middle, and right with the left group having the best quality, and the middle having the second quality, and the right having the lowest quality. The modified gin stand produces about 55% of the lint from the left position, 30% from the middle, and 15% from the right position. An experiment was designed to test the above described gin stand and to provide a minimum of 50 lbs of lint per position for mill evaluation. Treatments in the experiment were the gin stand positions plus a control, with control being the gin stand without the auger turning.

Analysis of variance detected differences as a result of gin stand positions for nearly all fiber and yarn quality parameters measured. The left position of the gin stand produced better quality fibers than those from the other two positions and more importantly, better quality fibers than the control sample.