Managing Dairy Nutrients for Stewardship: Washington State Science Symposium- May 2, 2014

The Science Symposium was focused on the principals and science supporting dairy nutrient management planning in Washington State. Speakers were from UC Davis, Agriculture and Agri-Food Canada-British Columbia, Oregon State University, Washington State University, WA Department of Ecology, Sunnyside Irrigation District and Whatcom Conservation District. Presentations related to WA NRCS Tech Note 14 (Winter Spreading) and the WA NRCS 590 (Nutrient Management Standard). The symposium ended with a panel discussion with the speakers, and concluded with a summary of expected next steps.

The goals of the symposium were to:

1. Learn the latest research regarding the winter spreading of dairy manure on water quality.

2. Identify areas of scientific agreement

3. Develop next steps


Please click on the highlighted presentation name below to view the recorded presentation from the symposium.

Presentation Presenter
Nitrogen Mineralization: Short and Long Term Considerations Dan Sullivan, Oregon State University
Perspectives on Wintertime Nitrogen Losses Shabtai Bittman, Agriculture and Agri-Food Canada
Understanding and Managing Groundwater Impacts from Dairies in California Thomas Harter, University of California, Davis
A Productive Approach to Water Resource Management Jim Trull, Sunnyside Valley Irrigation District
Nitrogen Dynamics at a Grass Field Overlying the Sumas-Blaine Aquifer in Whatcom County

Joe Harrison, Washington State University

Barb Carey, WA Department of Ecology

Charles Pitz, WA Department of Ecology

Protecting Puget Sound from Agricultural Pollution Using a Progressive Manure Application Risk Management (ARM) System Nichole Embertson, Whatcom Conservation District

Winter Application of Dairy Slurry on a Grazing Based Dairy
Joe Harrison, Washington State University
Speaker Panel: Continuing the Conversation Symposium speakers and audience


Additional Resources:

NRCS 590 Practice Standard.pdf

WA NRCS Technical Note 14 (Winter Spreading).pdf

Contact Information:

Karla Heinitz- WA State Conservation Commission,