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