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Joseph H. Harrison Professor and Nutrient Management Specialist Ph.D., Ohio State University Phone: (253) 445-4638 E-mail: jhharrison@wsu.edu

DAIRY NUTRITION WITH EMPHASIS ON WHOLE FARM NUTRIENT MANAGEMENT AND FORAGES.

Specific Research Areas:

• Determination of nutrient management factors limiting profitability and impacting the environment.
• Characterization of nutrient management factors of high producing herds.
• Development of milk allantoin prediction tool for fine tuning of ration balancing.
• Evaluation of the amino acid requirements of primiparous and multiparous cows in early lactation for enhanced profitability and reduced environmental impact.
• Evaluation of factors affecting the fermentation and nutritive value of ensiled forages (grass and corn silage).
• Evaluation of crop rotations for profitability and environmental stewardship.

Specific Outreach Efforts:

• Whole farm nutrient management.
• Washington State Dairy Newsletter
• Tri-State (WA/ID/OR) Dairy Shortcourse program for progressive dairy owners/managers.
• Whole farm forage management for profitability and environmental stewardship.

Selected Publications:

1. Nennich, T.D., J.H. Harrison, L.M. VanWieringen, N.R. St-Pierre, R.L. Kincaid, M.A. Wattiaux, D.L. Davidson, and E. Block. 2006. Prediction and evaluation of urine and urinary nitrogen and mineral excretion from dairy cattle. J. Dairy Sci. 89:353-364.
2. Nennich, T.D., J.H. Harrison, L.M. VanWieringen, D. Meyer, A.J. Heinrichs, W.P. Weiss, N.R. St-Pierre, R.L. Kincaid, D. Davidson, and E. Block. 2005. Prediction of manure and nutrient excretion of dairy cattle. J. Dairy Sci. 88:3721-3733.
3. Kincaid, R.L., D.K. Garikipati, T.D. Nennich, and J.H. Harrison. 2005. Effect of grain source and exogenous phytase on phosphorus digestibility in dairy cows. J. Dairy Sci. 88:2893-2902.
4. VanWieringen, L.M., T.H. Harrison, T. Nennich, D.L. Davidson, L. Morgan, S. Chen, M. Bueler, and F. Hoisington. 2005. Manure management effects on grass production, nutritive content, and soil nitrogen for a grass silage based dairy farm. J. Environ. Qual. 34(1):164-173.
5. Johnson, L.J., J.H. Harrison, D. Davidson, C. Hunt, W.C. Mahanna, and K. Shinners. 2003. Corn silage management: Effects of hybrid, maturity, chop length, and mechanical processing rate and extent of digestion. J. Dairy Sci. 86:287-308.
6. Johnson, L.J., J.H. Harrison, D. Davidson, C. Hunt, W.C. Mahanna, and K. Shinners. 2003. Corn silage management: Effects of hybrid maturity, chop length, and mechanical processing on digestion and energy content. J. Dairy Sci. 86:208:231.
7. W.M. Schager, J.H. Harrison, C.T. Gaskins, and D. Davidson. 2003. Factors affecting the application of milk allantoin as an estimator of microbial protein flow to the duodenum under commercial conditions. J. Dairy Sci. 86:1716-1721.
8. Johnson, L.J., J.H. Harrison, D. Davidson, W.C. Mahanna, K. Shinners, and D. Linder. 2002. Corn silage management: Effects of maturity, inoculation, and mechanical processing on pack density and aerobic stability. J. Dairy Sci. 85:434-444.