nitrogen fixing


involved in or aiding the process of nitrogen fixation.

1895–1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Cultural Dictionary

nitrogen fixing definition

The conversion of atmospheric nitrogen (which plants cannot absorb) into forms of nitrogen that plants can absorb. Bacteria in the topsoil carry out the conversion.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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