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prairie soil

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