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prairie soil

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noun
  1. a soil that forms in subhumid, temperate regions with tall grass as native vegetation.

Origin of prairie soil

An Americanism dating back to 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for prairie soil

prairie soil

noun
  1. a soil type occurring in temperate areas formerly under prairie grasses and characterized by a black A horizon, rich in plant foods
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