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Nutritional strategies to improve nitrogen efficiency and reduce nitrogen excretion of lactating dairy cowsNoftsger, Susan M., January 2003 (has links)
Thesis (Ph. D.)--Ohio State University, 2003. / Title from first page of PDF file. Document formatted into pages; contains xiv, 144 p.; also includes graphics (some col.) Includes bibliographical references (p. 129-144).
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