Nutrient & Waste Management Resources

Troy Downing, OSU Extension Dairy faculty (503) 842-5708 x 211 

(If the link to an article or publication is not available, contact Troy Downing for a reprint)

Journal Publications:dairy manure holding tank

Downing, T., K. Stiglbauer, M. Gamroth and J. Hart.  2010.  Use of Copper Sulfate in Footbaths in Oregon.  Prof Animal Sci. 26:332-334.

Downing, T. and S. Angima. 2009.  Nitrogen cycling on pasture based dairy farms.  The Professional Animal Scientist. 25:99-103. 

Downing, T. 2008.  Developing a system to track nitrogen cycling on pasture-based dairies. NACAA Journal.  July, 2008.  

Downing, T.  2008.  Impact of manure application timing in dairy pastures on the migration of nitrates to groundwater. The Professional Animal Scientist. 24:1 pg 100-103.

Downing, T., P. French, A. Peters, and K. Higgs. 2007.  Convincing Oregon's dairy industry they have a problem with phosphorus.  Journal of Extension Vol 45, no.3. 


Solid Spreader Wagon Calibration Checklist

Traveling Big Gun Calibration Checklist

Extension Publications and Other Articles:

Downing, T. 2015. Calibrating dairy manure nutrient application rates. EM 8768

Downing, T. and M. Valencia. 2015. El Cálculo de las Tasas de Aplicación de Estiércoles Nutrientes de Granja Lechera. EM 8768S

Downing, T . 2013. Calibrating manure application equipment. EM 8768.

Downing, T., K. Stiglbauer, M. Gamroth and  J. Hart.  2009.  Copper accumulation in dairy forage production systems.  Oregon Beef Council Report.  BEEF 016.  http//

Downing, T. and M. Gamroth.  2009. Ammonia Control Best Management Practices.  EM 8982-E.

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