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- Published with the approval of the Director of the Arkansas Agricultural Experiment Station, Manuscript Number 95147.
- Appreciation is expressed to the NRI Competitive Grants Program/USDA (Award No. 92–37208–8185) and Arkansas Science and Technology Authority (Award No. 94‐B‐02) for partial financial support.
- Mention of a trademark or proprietary product in this paper does not constitute a guarantee or warranty of the product by the USDA or the ARS and does not imply its approval to the exclusion of other products that also may be suitable.