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| Nitrogen (N) is an essential element of life and a part of all plant and animal proteins. Nitrogen can be produced in several ways. Some plants, such as soybeans and other legumes, recover nitrogen directly from the atmosphere or from the soil in a process know as "fixation," whereby the plant converts nitrogen into carbohydrates, essential amino acids, and proteins. Nitrogen is commercially recovered from the air as ammonia, which is produced by combining nitrogen in the atmosphere with hydrogen from natural gas. Ammonia is converted to other nitrogen compounds, the most important of which are urea (NH2CONH2), nitric acid (HNO3), ammonium nitrate (NH4NO3), and ammonium sulfate [(NH4)2SO4]. With the exception of nitric acid, these compounds are widely used as fertilizer. |
Publications
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Annual Publications
- Nitrogen (Fixed)--Ammonia
PDF Format:
| 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | - Appendixes
- Nitrogen
PDF Format:
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
XLS Format:
| 2002 | 2003 | 2004 | 2005 | 2006 | - Archive
| 1932-1993 |
Special Publications
- Fertilizers -- Sustaining Global Food Supplies
- Historical Statistics for Mineral and Material Commodities in the United States
Data Series 140 - Mineral Commodity Profiles: Nitrogen
OF-2004-1290
Contact
- USGS Mineral Commodity Specialist
Lori E. Apodaca
Phone: 703-648-7724
Fax: 703-648-7757
Email: lapodaca@usgs.gov
