of an International Symposium, F.N.Owens, ed. MP-109. Stillwater, Okla.: Oklahoma State University, Division of Agriculture.

Rihani, N., W.N.Garrett, and R.A.Zinn. 1993. Influence of level of urea, and method of supplementation on characteristics of digestion of high-fiber diets by sheep. J. Anim. Sci. 71:1657–1665.

Rush, I.G., and R.Totusek. 1975. Effects of frequency of ingestion of high-urea winter supplements by range cattle. J. Anim. Sci. 41:1141–1146.

Russell, J.B., and R.J.Wallace. 1988. Energy yielding and consuming reactions. Pp. 185–216 in The Rumen Microbial Ecosystem, P.N. Hobson, ed. London: Elsevier Applied Science.

Russell, J.B., J.D.O’Connor, D.G.Fox, P.J.Van Soest, and C.J.Sniffen. 1992. A net carbohydrate and protein system for evaluating cattle diets: I. Ruminal fermentation. J. Anim. Sci. 70:3551–3561.

Shain, D.H., R.A.Stock, T.J.Klopfenstein, and R.P.Huffman. 1994. Level of rumen degradable nitrogen in finishing cattle diets. J. Anim. Sci. 72(Suppl. 1):923 (abstr.).

Sindt, M.H., R.A.Stock, T.J.Klopfenstein, and D.H.Shain. 1993. Effect of protein source and grain type on finishing calf performance and ruminal metabolism. J. Anim. Sci. 71:1047–1056.

Sindt, M.H., R.A.Stock, and T.J.Klopfenstein. 1994. Urea versus urea and escape protein for finishing calves and yearlings. Anim. Feed Sci. Tech. 49:103–117.

Smuts, D. 1935. The relation between the basal metabolism and the endogenous nitrogen metabolism, with particular reference to the maintenance requirement of protein. J. Nutr. 9:403–433.

Spicer, L.A., C.B.Theurer, J.Some, and T.H.Noon. 1986. Ruminal and post-ruminal utilization of nitrogen and starch from sorghum grain-, corn-, and barley-based diets by beef steers. J. Anim. Sci. 62:521–530.

Stokes, S.R., A.L.Goetsch, A.L.Jones, and K.M.Landis. 1988. Feed intake and digestion by beef cows fed prairie hay with different levels of soybean meal and receiving postruminal administration of antibiotics. J. Anim. Sci. 66:1778–1789.

Susmel, P., M.Spanghero, B.Stefano, C.R.Mills, and E.Plazzotta. 1993. Digestibility and allantoin excretion in cows fed diets differing in nitrogen content. Livest. Prod. Sci. 36:213–222.

Villalobos, G. 1993. Integration of Complementary Forages with Rangeland for Efficient Beef Production in the Sandhills of Nebraska. Ph.D. dissertation. University of Nebraska, Lincoln, Nebraska.

Wilkerson, V.A., T.J.Klopfenstein, R.A.Britton, R.A.Stock, and P.S.Miller. 1993. Metabolizable protein and amino acid requirements of growing beef cattle. J. Anim. Sci. 71:2777–2784.

Zinn, R.A. 1988. Crude protein and amino acid requirements of growing-finishing Holstein steers gaining 1.43 kg per day. J. Anim. Sci. 66:1755–1763.

Zinn, R.A., and F.N.Owens. 1983. Influence of feed intake level on site of digestion in steers fed a high concentrate diet. J. Anim. Sci. 56:471–475.

Zinn, R.A., and F.N.Owens. 1993. Ruminal escape protein for lightweight feedlot calves. J. Anim. Sci. 71:1677–1687.

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