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Kohn, R. A. and M. S. Allen. 1995.
Effect of plant maturity and preservation method on in vitro protein
degradation of forages. J. Dairy Sci. 78:1544-1551. |
|
Kohn, R.A. and M.S. Allen. 1995. Prediction of
protein degradation of forages from solubility fractions. J. Dairy Sci.
78: 1774-1788. |
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Dou, Z., R.A. Kohn, J.D. Ferguson, R.C. Boston,
and J.D. Newbold. 1996. Managing nitrogen on dairy farms: an integrated
approach 1. Model description. J. Dairy Sci. 79:2071-2080. |
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Kohn, R. A., J. S.
Jonker, R. A. Erdman, and J. High. 1997. Milk urea nitrogen: Theory and
practice. Pages 83-90 in Proceedings of the Maryland Nutrition Conference,
Baltimore, MD. |
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Kohn, R. A., Z. Dou,
J. D. Ferguson, and R. C. Boston. 1997. A sensitivity analysis of nitrogen
losses from dairy farms. Journal of Environmental Management, 50:417-428. |
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Kohn, R. A. and T. F. Dunlap. 1998. Calculation
of the buffering capacity of bicarbonate in rumen fluid and in vitro.
J. Anim. Sci. 76: 1702-1709. |
|
Jonker, J.S., R.A. Kohn, and R.A. Erdman. 1998.
Using milk urea nitrogen to predict nitrogen excretion and utilization
efficiency in lactating dairy cattle. J. Dairy Sci. 81: 2681-2692. |
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Dou, Z., J.D. Ferguson, L.E. Lanyon, and R.A.
Kohn. 1998. Managing nitrogen on dairy farms: an integrated approach
2. Field application. Agron. J. 90: 573-581. |
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Kohn, R.A., K.F.
Kalscheur, and M. Hanigan. 1998. Evaluation of models for balancing the
protein requirements of dairy cattle. Symposium on Evaluation of Quantitative
Estimates for Meeting Amino Acids Requirements of Dairy Cows. J. Dairy
Sci. 81: 3402-3414. |
|
Jonker, J.S., R.A. Kohn, and R.A. Erdman. 1999.
Milk urea nitrogen target concentrations for lactating dairy cows fed
according to national research council recommendations. J. Dairy Sci.
82:1261-1273. |
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Kalscheur, K.F., J.H. Vandersall, R.A. Erdman,
R.A. Kohn, and E. Russek-Cohen. 1999. Effects of dietary crude protein
concentration and degradability on milk production responses of lactating
dairy cows. J. Dairy Sci. 82:545-554. |
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Knowlton, K.F. and R.A. Kohn. 1999. Feeding management
to reduce phosphorus losses from dairy farms. Proceedings of the Mid
Atlantic Dairy Management Conference, Feb. 24-25, 1999, Camp Hill, PA |
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Dunlap, T.F., R.A. Kohn, G.E. Dahl, M. Varner,
and R.A. Erdman. 2000. The impact of somatotropin, milking frequency
and photoperiod on dairy farm nutrient flows. J. Dairy Sci. 83:968-976. |
|
Dunlap, T.F., R.A. Kohn, L.W. Douglas, and R.A.
Erdman. 2000. Diets deficient in rumen undegraded protein did not depress
milk production. J. Dairy Sci. 83: 1806-1812. |
|
Kohn, R.A. and R.C. Boston 2000. The role of thermodynamics
in controlling rumen metabolism. Pages 11 to 24 in Modelling Nutrient
Utilization in Farm Animals (J.P. McNamara, J. France and D.E. Beever,
eds). CAB International Publishing. |
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Kohn, R.A., K.F. Kalscheur, and E. Russek-Cohen.
2002. Evaluation of models to estimate urinary nitrogen and expected
milk urea nitrogen. J. Dairy Sci. 85:227-233. |
|
Jonker, J.S., R.A. Kohn, J. High. 2002. Use of
milk urea nitrogen to improve diary cows diets. J. Dairy Sci. 85:939-946. |
|
Jonker, J. S., R. A. Kohn, and J. High. 2002.
Dairy herd management practices that impact nitrogen utilization efficiency.
J. Dairy Sci. 85:1218-1226. |
|
Dou, Z., J. D. Ferguson, J.
Fiorini, J. D. Toth, S. M. Alexander, L. E. Chase, C. M. Ryan, K. F.
Knowlton, R. A. Kohn , A. B. Peterson, J. T.
Sims, and Z. Wu. 2003. Phosphorus feeding levels and critical control points
on dairy farms. J. Dairy Sci. 86:3787-3795. |
|
Spears, R. A., A. J. Young, and R. A. Kohn. 2003. Whole-farm phosphorus
balance on western dairy farms. J. Dairy Sci. 86:688-695. |
|
Spears, R. A., A. J. Young, and R. A. Kohn. 2003. Whole-farm nitrogen
balance on western dairy farms. J. Dairy Sci. 86:4178-4186. |
|
Peterson, A. B., K. French, E. Russek-Cohen, and R. A. Kohn. 2004. Comparison
of analytical methods and the influence of milk components on milk urea
nitrogen recovery. J. Dairy Sci. 1747-1750. |
|
Kohn, R. A., K. French, and E. Russek-Cohen. 2004. A comparison of instruments
and laboratories used to measure milk urea nitrogen in bulk-tank milk samples.
J. Dairy Sci. 87:1848-1853. |
|
Guo, K., E. Russek-Cohen, and R. A. Kohn. 2004. Effects of milk urea
nitrogen and other factors on probability of conception of dairy cows.
J. Dairy Sci. 87:1878-1885. |
|
Kohn, R. A. 2004. Use of animal nutrition to manage nitrogen emissions
from animal agriculture. Proceedings of the Mid-Atlantic Nutrition Conference,
Mar. 24-25, Timonium, MD, pp.25-30. |
|
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Kohn, R. A., Dinneen, and E.
Russek-Cohen. 2005. Using blood urea nitrogen to predict nitrogen excretion,
and efficiency of nitrogen utilization in cattle, sheep, goats, horses,
pigs, and rats. J. Anim. Sci. 83:879-889. |
|
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Kalscheur, K. F., R. L. Baldwin
VI, B. P. Glenn, and R. A. Kohn. 2006. Milk production of dairy cows
fed differing concentrations of rumen-degraded protein. J. Dairy Sci.
89: 249-256. |
|
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Guo, J., R. R. Peters, and R. A. Kohn. 2007. Effect
of a transition diet on production performance and metabolism in periparturient
dairy cows. J. Dairy Sci. 90: 5247-5258. |
