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Also available:
World English Dictionary
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hardpan
hard·pan
[
hrd pàn
]
noun
Definition:
hard layer below soil:
a layer of hard matter, especially clay, that lies under soft soil and that plant roots cannot penetrate
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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