hard-pan

listen to the pronunciation of hard-pan
English - English

Definition of hard-pan in English English dictionary

hardpan
a distinct layer of soil that is largely impervious to water
hardpan
A hard, relatively impervious, layer of SOIL lying just below the surface Sometimes synonymous for TILL
hardpan
A soil layer with physical characteristics that limit root penetration and restrict water movement
hardpan
Firm dirt surface off the fairway
hardpan
A hardened or cemented soil horizon, or layer The soil material is sandy, loamy, or clayey and is cemented by iron oxide, silica, calcium carbonate, or other substance
hardpan
a subsurface indurated horizon Red-brown hardpans in Australia are characterised by the presence of a porous matrix, commonly red-brown in colour, cemented by silica (usually hyalite), in a variety of transported or residual host materials
hardpan
Impervious layer found within the soil It can result from the precipitation of iron, illuviation of clay or the cementing of sand and gravel by calcium carbonate precipitates
hardpan
Cemented or compacted and often clayey layer in soil that cannot be penetrated by roots. Lime, gypsum, iron, and other minerals may be carried up to the surface of soil by capillary action and deposited to form a natural concrete. In agricultural situations, special equipment may be used to chisel away hardpan so that crop plants can grow
hardpan
A packed, non-porous soil layer that is difficult for water or a shovel to penetrate
hardpan
very firm, unyielding ground (many times bare) Example: You can find a lot of hardpan on hot dry plains courses
hardpan
Describes a soil condition of extreme compaction; compaction in layers
hardpan
A general term used to describe a hard, cemented soil layer which does not soften when wet and may be impervious to water
hardpan
The hard substratum
hardpan
crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions
hardpan
A layer of impermeable material (usually clay) that water cannot soak through
hardpan
very firm, unyielding ground Especially if there is little grass Example: "You can find a lot of hardpan on hot dry plains courses which often results in tons of roll"
hardpan
A hard impervious layer composed chiefly of clay or organic materials cemented by relatively insoluble materials, which does not become plastic when wet, and definitely limits the downward movement of water and roots
hardpan
{i} layer of clay or other solid matter; unbroken soil; solid base, strong foundation
hardpan
A hardened soil layer in the lower A or in the B horizon caused by cementation of soil particles with organic matter or with materials such as silica or calcium carbonate The hardness does not change appreciably with changes in moisture content, and pieces of the hard layer do not disintegrate in water
hardpan
Same as Hard pan, under Hard, a
hardpan
A layer of earth so compacted that roots cannot penetrate it Back to alphabetical list