Gaskins andMr. Bill D. Boren in the statistical analysis. Special thanks is extended to my wife, Barbara, who assumed the responsibility for the preparation of this manuscript. I would like to dedicate this paper to the memory of my father, Raymond D. Zweiacher, and grandfather, Jakob Zweiacher, who influenced me in the direction of animal science. nTABLE OF CONTENTS ACKNOWLEDGMENTS ii LIST OF TABLES iv
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