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POSTER: Groundwater Nitrate Below a Manured Dairy Field Over the Sumas-Blaine Aquifer

Publication number Date Published
09-03-027June 2009
VIEW NOW POSTER: Groundwater Nitrate Below a Manured Dairy Field Over the Sumas-Blaine Aquifer (Number of pages: 1) (Publication Size: 697KB)

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Author(s) Carey, B., J. Harrison (WSU), and L. VanWieringen (WSU)
Description The Department of Ecology and Washington State University conducted a 4-year study (2004-2008) to observe nitrogen concentrations in groundwater, soil, manure, and grass at a 22-acre grass field in Whatcom County.

Weekly sampling detected elevated soil nitrate concentrations in the fall preceding groundwater nitrate increases in the winter, but did not predict the degree of nitrate increase.

Mean water table groundwater nitrate+nitrite-N concentrations in the field were below the maximum contaminant level for drinking water (10 mg/L nitrate-N) following years when total nitrogen applied was about the same as nitrogen removed in grass. However, the mean nitrate+nitrite-N in six shallow monitoring wells was 30 mg/L during the winter following tillage.
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Keywords grass, Whatcom County, soil, county, poster, wells, water, Ecology, nitrate, manure, groundwater, dairy, aquifer
WEB PAGE Active groundwater studies

Quality Assurance Project Plan: Groundwater, Soil, and Crop Nitrogen at a Field Where Dairy Waste is Used as Fertilizer in Whatcom County.