Posted by Leslie on Sunday, November 11, 2012 at 9:46pm.
There are many sources online written at various grade levels. Perhaps this one will help:
http://www.elmhurst.edu/~chm/onlcourse/chm110/outlines/nitrogencycle.html
I recommend reading several that you easily find by using the search words "nitrogen cycle" . You will probably find one to your liking.
Already answered.
http://www.jiskha.com/display.cgi?id=1352679613
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