doi: 10.2134/jeq2018.04.0159 C. Pilona, P. A. Moore Jr. *b, D. H. Potec, J. W. Martinb, P. R. Owensc, A. J. Ashworthb, D. M. Millerd and P. B. DeLaunee a Univ. of Georgia, Dep. of Crop and Soil Sciences, 2360 Rainwater Rd., Tifton, GA 31793 b USDA-ARS, Poultry Production and Product Safety Research Unit, Plant Sciences 115, Univ. of Arkansas, Fayetteville, AR, 72701 c USDA-ARS, 6883 South Highway 23, Booneville, AR 72927 d Crop, Soil, and Environmental Sciences Dep., Plant Sciences 115, Univ.