EVALUATION OF MODERN COTTON HARVEST SYSTEMS ON IRRIGATED COTTON: FIBER QUALITY

Picker and stripper harvest systems were evaluated on production-scale irrigated cotton on the High Plains of Texas over three harvest seasons. Observations on fiber quality using High Volume Instrument (HVI) and Advanced Fiber Information Systems (AFIS) were made on multiple cultivars harvested from six locations. When fibers were relatively immature, micronaire, length, and length uniformity as measured by HVI were better for picker harvested cotton than for stripped cotton leading to a higher loan value and average sale price for the producer. In cases where fibers were more mature, differences in fiber quality parameters between picked and stripped cottons were less pronounced leading to less discrepancy in the value of cotton harvested. However, differences in nep counts, short fiber content, and visible foreign matter between harvest treatments were still distinguishable. The results of this study indicate that producers may realize greater fiber quality and lint value by using picker harvesters, but the magnitude of those differences are a function of growing conditions and/or fiber maturity. Differences in cultivars also played a large role in determining fiber properties.