hardpan

hard·pan

H0061500 (härd′păn′)n.1. A layer of hard subsoil or clay. Also called caliche.2. Hard, unbroken ground.3. A foundation; bedrock.

hardpan

(ˈhɑːdˌpæn) n (Physical Geography) a hard impervious layer of clay below the soil, resistant to drainage and root growth

hard•pan

(ˈhɑrdˌpæn)

n. 1. any layer of firm detrital matter, as of clay, underlying soft soil. 2. hard, unbroken ground. [1810–20]

Hardpan

A compacted layer of soil that is difficult for roots or water to penetrate. It often forms just below the depth of plowing, when plowing, year after year, is always to the same depth.

Thesaurus

Noun

hardpan - crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regionscalichedirt, soil - the part of the earth's surface consisting of humus and disintegrated rock

hardpan

hardpan,

condition of the soil or subsoil in which the soil grains become cemented together by such bonding agents as iron oxide and calcium carbonate, forming a hard, impervious mass. It is disadvantageous to farming, interfering with the circulation of moisture in the soil and with the growth of roots through the soil. When the condition is caused by the filling of the air spaces in the soil with fine particles of clay, the subsoil is called a clay pan. This usually occurs in acid soil.

Hardpan

An extremely hard soil containing gravel and boulders.

hardpan

[′härd‚pan] (geology) caliche

hardpan

An extremely dense hard layer of soil, boulder clay, or gravel; difficult to excavate.

hardpan

hard·pan

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hard•pan

Hardpan

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hardpan,

Hardpan

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Synonyms for hardpan

noun crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions

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