Acknowledgment 



The authors wish to express their thanks to 

 Mr. H. Hayes for his skill in caring for the ex- 

 perimental animals and scheduling of the experi- 

 ments and to Mrs. R. A. Ceofifrion for her help 

 in the calculation of the data. 



The authors are members of the staff of the Uni- 

 versity of New Hampshire. Mr. Colovos is Professor 

 of Dairy Science and Nutritionist; Mr. Holter is 

 Assistant Professor of Dairy Science and Nutrition- 

 ist; Mr. Peterson is Associate Professor of Soil and 

 Water Science; Mr. Blood is Associate Professor of 

 Agronomy; and Mr. Davis is Associate Chemist in 

 Biochemistry. 



