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 by similarity [list alphabetically]

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.
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.

Alphabetical Index of Topics a b c d e f g h i j k l m n o p q r s t u v w x y z

U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.usgs.gov/science//science/science.php?term=1522&b=0&n=20
Page Contact Information: Ask USGS