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green manure

noun, Agriculture
1.
a crop of growing plants, as clover and other nitrogen-fixing plants, plowed under to enrich the soil.
2.
manure that has not undergone decay.
Origin
1835-1845
1835-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for green manure
  • Its ability to grow rapidly and fix nitrogen made it an ideal green manure.
  • White mustard is also grown as a salad plant, as a forage plant for sheep, and as green manure to be plowed under.
  • Land managers can greatly improve mine soils by growing green manure crops.
British Dictionary definitions for green manure

green manure

noun
1.
a growing crop that is ploughed under to enrich the soil
2.
manure that has not yet decomposed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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green manure in Science
green manure  
A growing crop, such as clover or grass, that is plowed under the soil to improve fertility. Green manure can also reduce erosion and, if the crop is leguminous, add nitrogen to the soil.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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6
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