Review of Short Phrases and Links|
This Review contains major "Hardpan"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- A hardpan is a hardened layer of soil that prevents drainage.
- Hardpan is a subsoil that is rocklike and impenetrable.
- Hardpan is a layer of clay or minerals that water cannot pass through easily.
- Hardpan is a dense layer of soil that restricts root growth and the movement of moisture, air and beneficial organisms through the soil.
- Hardpan is a mixture of clay, silt, sand, and gravel.
- These constituents may then accumulate to form a hardpan or iron band.
- Redder in the surface and denser hardpan than associated Madera soil.
- Words Dictionary hardpan ( h--rd ' p--n ') n.
- For more information on hardpan, visit Britannica.com.
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- A red clay loam layer above the hardpan was recognized.
- They are underlain by a heavy, clay hardpan - an almost impermeable layer of fine-textured, hardened clay particles.
- The hardpan forms as fine clay particles, along with suspended minerals within the surface soil are leached down to the 'subsoil.
- The subsoil rests abruptly on a mainly silica-cemented hardpan at depths ranging from 20 to 40 inches.
- In addition, an increase in clay content of the subsoil above the hardpan was described in some places.
- There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water.
- Common salts such as sodium molecules contained in wastewater can fulfil this roll and lead to a localized hardpan in some soil types.
- Others are man-made, such as hardpan formed by repeated plowing or heavy traffic that compacts the soil.
- Hardpan can occur naturally or be caused by repeated cultivation with a tiller or plow.
- The USDA says that hardpan is a hardened or cemented soil horizon, or layer.
- A duripan is a diagnostic soil horizon that is cemented by illuvial silica into a subsurface hardpan .
- Florida hardpan is a common rock that most often looks like a sandy clod.
- In soil science, agriculture and gardening, hardpan is a general term for a dense layer of soil, residing usually below the uppermost topsoil layer.
- Hardpan can be a problem in farming and gardening, by impeding drainage of water and restricting the growth of plant roots.
- In these situations, the hardpan can be broken up by either mechanical means such as digging or plowing, or through the use of soil amendments.
- The hardpan can be a few inches to a few feet below the ground surface.
- Encyclopedia of Keywords > Nature > Matter > Soil
- Glossaries > Glossary of Soil Science /
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