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Contributions by: Gregory B. Penner, University of Saskatchewan, Canada; Emilio M. Ungerfeld, Instituto de Investigaciones Agropecuarias (INIA), Chile; and Timothy J. Hackmann, University of California-Davis, USA; Mike Coffey, Scotland's Rural College (SRUC); Kristin Hales, US Meat Animal Research Center - USDA-ARS, USA; Jeferson Lourenco, Darren S. Seidel, Osman Yasir Koyun, Dylan Davis and Christina Welch, University of Georgia, USA; James E. Wells, US Meat Animal Research Center - USDA-ARS, USA; and Todd R. Callaway, University of Georgia, USA
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