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 of green manure

First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

green manure in Science

green manure

  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.