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• Organization: U.S. Environmental Protection Agency
• Dataset Last Updated: October 01, 2002

Animal agriculture manure is a primary source of nitrogen and phosphorus to surface and groundwater. Manure runoff from cropland and pastures or discharging animal feeding operations and...

• Organization: U.S. Environmental Protection Agency
• Dataset Last Updated: October 01, 2002

Estimated state-wide total nitrogen (TN) and total phosphorus (TP) loads and yields, as predicted by the 2012 regional USGS SPARROW models.Excess nitrogen and phosphorus loading impacts not only...

• Organization: Department of the Interior
• Dataset Last Updated: August 05, 2021 at 12:00 AM

This dataset contains measurements of water chemistry taken from experimental incubation of sediment cores collected from the Fox and Duck rivermouths during the 2016 growing season. In addition,...

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• Organization: U.S. Environmental Protection Agency
• Dataset Last Updated: October 01, 2002

Amounts of fertilizer P2O5 purchased by states in individual years 2003, 2005, 2007, 2009 and 2011, and the % change in average amounts purchased per year from 2002-2006 to 2007-2011. Fertilizer...