1: Introduction - D.M.S.S. Vitti and E. Kebreab 2: Isotope Dilution Technique - D.M.S.S. Vitti and J. C. da Silva Filho 3: Kinetic Models for the Study of Phosphorus Metabolism in Ruminants and Monogastrics - J. France, R.S. Dias, D.M.S.S. Vitti and E. Kebreab 4: Phosphorus and Calcium Utilization in Ruminants Using Isotope Dilution Technique - D.M.S.S. Vitti, J.C. da Silva Filho, H. Louvandini, R.S. Dias, I.C.S. Bueno and E. Kebreab 5: Phosphorus and Calcium Utilization in Non-Ruminants Using Isotope Dilution Technique - J.B. Lopes, C.E. Furtado, J.A. Moreira, J.C. da Silva Filho, R.A. Brandi, E. Kebreab and D. M. S. S. Vitti 6: Bioavailability of Calcium and Phosphorus in Feedstuffs for Farm Animals - E. Kiarie and C.M. Nyachoti 7: Phosphorus and Calcium Nutrition and Metabolism - T.L. Veum 8: Phosphorus and Calcium Requirements of Ruminants - K.F. Knowlton, D. Beede and E. Kebreab 9: Dynamics of Calcium and Phosphorus Metabolism in Laying Hens - S. de Vries, R.P. Kwakkel and J. Dijkstra 10: Efficiency of Phosphorus and Calcium Utilization in Dairy Cattle and Implications to the Environment - A. Bannink, L. ?ebek and J. Dijkstra