Hardpan meaning

härd'păn'
A layer of hard subsoil or clay.
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Hard, unbroken ground.
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A foundation; bedrock.
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A layer of hard soil cemented by almost insoluble materials that restrict the downward movement of water and roots.
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Solid, unplowed ground.
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The hard, underlying part of anything; solid foundation.
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A hard, usually clay-rich layer of soil lying at or just below the ground surface, in which soil particles are cemented together by silica, iron oxide, calcium carbonate, or organic matter that has precipitated from water percolating through the soil. Hardpans do not soften when exposed to water.
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A distinct layer of soil that is largely impervious to water.
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A dry lake.
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