Thesis Details


Thesis Title: Impact of cottons grown conventionally and in ultra narrow rows on grower yield and textile plant performance and quality
Thesis Author: Bryan Anderson
Abstract: The ultra narrow row (UNR) cotton system is defined as a method of planting a cotton field with closely spaced rows. The row spacing for UNR cotton is typically 7.5 inches to 15 inches. The potential for increased yield by using the UNR system has caught the attention of U. S. cotton farmers, and thus the attention of ginners and textile mills. While these three groups share an interest in UNR cotton, they do not share the same opinion. Farmers favor UNR cotton because of the potential for increased yield, a shorter growing season, and lower equipment costs. Conversely, cotton ginners, buyers, and spinners are wary of UNR cotton because of the current perception of increased levels of non-lint content. For gins not prepared to handle UNR stripper harvested cotton, increased non-lint content can reduce the efficiency of the gin and increase wear on ginning equipment. Spinners are wary of UNR cotton because studies have shown that increased non-lint content in the cotton fiber can cause an increased number of ends down in spinning, increased waste in the card room, and poor yarn and fabric quality. Very little research has been conducted on the impact of UNR cotton in the textile plant. This thesis studied the interaction between the independent variables of row spacing, harvesting, and ginning, to determine their impact on several dependent variables including card room waste, spinning performance, yarn quality, and white specks in fabric. The information provided in this thesis pertains to the spinning performance and yarn quality of open-end yarn spun from UNR spaced cottons compared to open-end yarn spun from conventionally spaced cottons. Cotton buyers and yarn spinners may be able to reap the benefits of UNR cotton by specifying in the purchase contracts the methods of harvesting and cleaning in which UNR cottons are exposed. These benefits include finer fibers of longer length. Also, the potential for UNR cottons to have lower micronaire values, yet still be mature, could be of benefit to spinners. Given the recent trend of U.S. cottons to have higher micronaire values, the potential exists for money to be saved in the areas of twisting costs and equipment speeds by purchasing UNR cottons with lower micronaire values.