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Human Alteration of the Global Nitrogen Cycle
An article showing human impacts at all levels of this cycle.
Nitrogen Cycle
Diagram, facts, nitrogen fixation methods, and what fixes nitrogen.
The Nitrogen Cycle
Learn about the nitrogen cycle, and how humans have made an impact on it. Includes a quiz.
The Nitrogen Cycle
Diagram and explanation of the cycle.
Nutrient Overload: Unbalancing the Global Nitrogen Cycle
Shows how nutrient pollution through man can lead to algae blooms that unbalance the cycle.
The Microbial World: The Nitrogen Cycle and Nitrogen Fixation
How nitrogen gets "fixed" by bacteria to become available for plants on earth.
Nitrogen Cycle
An interactive diagram: you click on an aspect of the cycle or a state of nitrogen and the diagram will simplify to show you which part of the cycle it applies to.
The Nitrogen Cycle
An explanation of the different forms of nitrogen on earth, nitrogen fixation, decay, and nitrification.
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