An overview of the nitrogen cycle, covering nitrogen fixation, decay, nitrification, denitrification, and more.

Find out how nitrogen is cycled throughout the biosphere as it passes through the nitrogen cycle. Learn about the biotic and abiotic factors involved in the process as well as the implications of human activity on the nitrogen cycle.

Instructional module focusing on the nitrogen cycle. Discussion includes the requirement of nitrogen by all organisms, the five processes in the nitrogen cycle, and how humans impact this cycle. The site also includes an interactive...

A semi-technical description of the nitrogen cycle. Contains a link to an abridged version of the page along with a list of further resources on the topic.

A description of the key concepts and steps within the nitrogen cycle, along with a large chart illustrating the cycle in pictorial form.

Nitrogen is essential to all living things. This article explains what the nitrogen cycle is and the five steps involved in it.

[Free Registration/Login may be required to access all resource tools.] Covers the nitrogen cycle.

Learn about the Nitrogen cycle, and understand how it affects the ecosystem.

An overview of the impact of human activities on the environment and how those actions effect the nitrogen cycle.

In this incredibly comprehensive interactive tutorial you will learn about the carbon cycle. You will also learn about how matter and energy flows through the nitrogen cycle and phosphorus cycle.

Describes the steps involved in the nitrogen cycle, a critical biogeochemical cycle.

Kids learn about the nitrogen cycle and how this nutrient travels through the ecosystem to sustain life on Earth.

Students are asked to conduct online research in order to write an informative article about the development of algae blooms in Maryland's Deep Creek Lake.

An activity where students try to optimize profits by producing the largest daily output of ammonia by simulating the Haber-Bosch process. Students will use their knowledge of equilibrium reactions and the effects of variables like...