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Found 2644 dataset(s) matching "nitrogen".
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1988 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1991 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1987 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1986 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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This data set reports the measurement of stable carbon, nitrogen, and oxygen isotope ratios in organic material (plant, litter and soil samples) in forest canopy profiles and pasture (grasses and...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1989 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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Nitrogen stable isotope data and associated meta data from the 2007 National Lakes Assessment, and the 2008-2009 National Rivers and Streams Assessment. The data also include site location,...
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During the spring and summer of 2022, the U.S. Geological Survey collected water-quality samples for nutrient analysis at 45 stations across the state of Connecticut and adjacent areas of New York...
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This U.S. Geological Survey data release contains datasets that combine past data with future projections of nitrogen sources and nitrogen export to the Chesapeake Bay watershed for the years...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1990 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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This metadata record documents an ascii comma-delimited file representing estimated nitrogen in kilograms by NHDPlus v2.1 catchments for the conterminous United States. Nitrogen estimates were...
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Phosphorus, nitrogen, and suspended-sediment loads, in 24 U.S. tributaries of the Great Lakes, were calculated using U.S. Geological Survey (USGS) data from the Great Lakes Restoration Initiative...
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Daily visitor use in Rocky Mountain National Park has increased substantially since 2014, raising questions about the impact of human waste on water quality in popular areas without latrines....
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A steady-state groundwater flow model, using MODFLOW-NWT, was developed to better understand groundwater flow in coastal Connecticut and adjacent areas of New York and Rhode Island. Aquatic...
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This coverage contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1985 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West...
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Permafrost (perennially frozen) and active-layer (seasonally thawed) soils varying in soil carbon (C) and nitrogen (N) content and radiocarbon age were collected from three sites in interior...
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This dataset represents the application of nitrogen within individual, local NHDPlusV2 catchments and upstream, contributing watersheds based data published in EPA EnviroAtlas. Attributes were...
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The Nitrogen Fertilizer Application data set of the Global Fertilizer and Manure, Version 1 Data Collection represents the amount of nitrogen fertilizer nutrients applied to croplands. The...
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This data release presents water-quality and streamflow data from 12 streams on Cape Cod, Massachusetts, which were used to identify potential land areas that are sources of high nitrogen loading...
