Nitrogen cycle
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| - | + | The worldwide circulation of nitrogen from the abiotic envirnoment into organisms and back into the abiotic environment. | |
| - | == | + | ==Reference== |
| + | *Raven,P.H.,and L.R.Berg,<u>Environment 5th ed.</u>John Wiley&Sons,Inc,2006 | ||
Revision as of 00:56, 7 March 2006
The worldwide circulation of nitrogen from the abiotic envirnoment into organisms and back into the abiotic environment.
Reference
- Raven,P.H.,and L.R.Berg,Environment 5th ed.John Wiley&Sons,Inc,2006
