Hard pan

Also found in: Medical, Acronyms.
the hard stratum of earth lying beneath the soil; hence, figuratively, the firm, substantial, fundamental part or quality of anything; as, the hard pan of character, of a matter in dispute, etc. See Pan.

See also: Hard

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References in periodicals archive ?
Quick on the draw, the Grand Vitara hurtled from the hard pan and powered up the dunes.
For soft to medium rock, shale, hard pan and caliched ground conditions up to 10,000 psi, use the Gauntlet bit.
The other unfortunate side effect of rotovation is that the plot eventually develops a hard pan just below the four inch depth that the tines usually get down to, and as a result, the drainage goes to pot as well
Neither is a rotavator a good enough substitute for spade or fork, because besides cultivating the soil to little more than six inches, it eventually creates a hard pan, and, consequently, a waterlogged soil.
If it's getting wetter gardeners need to focus on improving drainage, especially on clay soils or where it is suspected a hard pan has been allowed to build up a foot or so beneath the surface because cultivation has previously been neglected.
The Gauntlet bit is designed for use in soft to medium rock, shale, hard pan and caliche ground conditions up to 10,000 psi with exceptional steering capabilities.