Melvin R. George is Extension Range and Pasture Specialist, Department of Agronomy and Range Science, University of California, Davis; Ronald S. Knight is County Director and Farm Advisor, Tehama County Cooperative Extension. Peter B. Sands is Staff Research Associate, Department of Agronomy and Range Science, University of California, Davis; Montague W. Demment is Associate Professor, Department of Agronomy and Range Science, University of California, Davis;