{{PD-USGov-EPA}} *'''Source:''' This is an image of nitrogen cycle taken from this [http://www.epa.gov/maia/html/nitrogen.html] EPA website. Minor cleanup (text, flat areas) and conversion to PNG by ~~~.
({{PD-USGov-EPA}} *'''Source:''' This is an image of nitrogen cycle taken from this [http://www.epa.gov/maia/html/nitrogen.html] EPA website. Minor cleanup (text, flat areas) and conversion to PNG by ~~~.)
Transwiki approved by: w:en:User:Dmcdevit This image was copied from wikipedia:en. The original description was: {{PD-USGov-EPA}} *'''Source:''' This is an image of nitrogen cycle taken from this [http://www.epa.gov/maia/html/nitrogen.html] EPA web