References

1. http://aipl.arsusda.gov. (accessed February, 2004).

2. National Research Council. Nutrient Requirements of Dairy Cattle, 7th Rev. Ed.; National Academy Press: Washington, DC, 2001. (www.nap.edu).

3. Schwab, C.G.; Ordway, R.S.; Whitehouse, N.L. Amino Acid Balancing in the Context of the MP and RUP Requirements, Proc. Florida Ruminant Nutr. Symposium, Gainesville, FL, 2004; 10 25.

4. Oba, M.; Allen, M.S. Evaluation of the importance of the digestibility of neutral detergent fiber from forage: Effects on dry matter intake and milk yield of dairy cows. J. Dairy Sci. 1999, 82, 589 596.

5. Mertens, D.R. Creating a system for meeting the fiber requirements of dairy cows. J. Dairy Sci. 1997, 80, 1463 1481.

6. Wu, Z.; Satter, L.D. Milk production during the complete lactation of dairy cows fed diets containing different amounts of protein. J. Dairy Sci. 2000, 83, 1042 1051.

7. Wu, Z.; Satter, L.D.; Blohowiak, A.J.; Stauffacher, R.H.; Wilcox, J.H. Milk production, estimated phosphorus excretion, and bone characteristics of dairy cows fed different amounts of phosphorus for two or three years. J. Dairy Sci. 2001, 84, 1738 1748.

8. Tylutki, T.P.; Fox, D.G.; McMahon, M. Implementation of the CuNMPS: Development and Evaluation of Alter natives, Proc. Cornell Nutr. Conf., Syracuse, NY, 2002; 57 69.

W. W. Thatcher

University of Florida, Gainesville, Florida, U.S.A.

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