Nitrogen is a substance that is essential for all life on earth. This informative book explains how the Earth's supply of nitrogen moves in different forms in a cycle from the air to the soil to living things. Detailed diagrams and an experiment help explain such processes as fixation, nitrification, and dentrification, as well as the ways in which human activities can interfere with the nitrogen cycle.
This is Book 3 in the Earths Cycles In Action Series. See all Earths Cycles In Action books here.
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