USGS: Science Topics: nitrogen

Science Topics

Nitrogen

Nonmetal element with symbol N and atomic number 7 <http://periodic.lanl.gov/7.shtml>

Subtopics:
(none)

Results 1 - 3 of 3 listed alphabetically [list by similarity]

Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [More info]: Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
Nutrients in the Nation's streams and groundwater: National findings and implications [More info]: Despite public sector efforts to reduce nonpoint-source nutrients in streams and rivers, concentrations have remained the same or increased, continuing to pose risks to aquatic life and human health.
Selenium and stable isotopes of carbon and nitrogen in the benthic clam Corbula amurensis from Northern San Francisco Bay, California: May 1995-February 2010 [More info]: Monthly selenium concentration in this keystone species shows strong spatial and seasonal variation in a five-year series of analyses.

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U.S. Department of the Interior | U.S. Geological Survey
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