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This image is a derivative work of the following images: File:Nitrogen Cycle.svg licensed with Cc-by-sa-3.0 . 2009-09-27T05:47:47Z Raeky 800x600 (298078 Bytes) outlines for text
{{Information| |Description=Diagram of the nitrogen cycle in an aquarium. |Source=Own work, drawn in Sodipodi and Inkscape by Ilmari Karonen. |Date=2005-10-2 File usage The following 4 pages use this file:
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The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the ...
Nitrogen is plentiful in the Earth's atmosphere, and a number of commercially-important agricultural plants engage in nitrogen fixation (conversion of atmospheric nitrogen to a biologically useful form). However, plants mostly receive their nitrogen through the soil, where it is already converted in biological useful form.
This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship. Heptagon