diagnostic horizon

См. также в других словарях:

• horizon — [ ɔrizɔ̃ ] n. m. • orizon v. 1360; orizonte XIIIe; lat. horizon, mot gr., de horizein « borner » 1 ♦ Limite circulaire de la vue, pour un observateur qui en est le centre. La plaine s étend jusqu à l horizon. Le soleil descend sur l horizon,… …   Encyclopédie Universelle

• horizon — /heuh ruy zeuhn/, n. 1. the line or circle that forms the apparent boundary between earth and sky. 2. Astron. a. the small circle of the celestial sphere whose plane is tangent to the earth at the position of a given observer, or the plane of… …   Universalium

• Petrocalcic Horizon — A petrocalcic horizon is a diagnostic horizon in USDA soil taxonomy. They are formed when secondary Calcium Carbonate or other carbonates accumulate in the subsoil to the extent that the soil becomes cemented into a hardpan. Petrocalcic horizons… …   Wikipedia

• Soil horizon — Soil samples illustrating horizons (subsoil on right) A soil horizon is a specific layer in the land area that is parallel to the soil surface and possesses physical characteristics which differ from the layers above and beneath …   Wikipedia

• Deepwater Horizon oil spill — 2010 oil spill and BP oil spill redirect here. For other oil spills in 2010, see 2010 oil spill (disambiguation). For the 2006 oil spill involving BP, see Prudhoe Bay oil spill. For the drilling rig and explosion, see Deepwater Horizon… …   Wikipedia

• Simca-Talbot Horizon — Pour les articles homonymes, voir Horizon. Simca Talbot Horizon Une Talbot Horizon …   Wikipédia en Français

• soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …   Universalium

• Fragipan — A fragipan is a diagnostic horizon in USDA soil taxonomy. They are altered subsurface soil layers that restrict water flow and root penetration. Fragipans are similar to a duripan in how they affect land use limitations. In soil descriptions,… …   Wikipedia

• paleosol —    A soil that formed on a landscape in the past with distinctive morphological features resulting from a soil forming environment that no longer exists at the site. The former pedogenic process was either altered because of external… …   Glossary of landform and geologic terms

• List of hospitals in Pennsylvania — (U.S. state), sorted by location.A* Abington ** Abington Memorial Hospital * Aliquippa ** Alliquippa Community Hospital * Allentown ** St. Luke s Hospital Allentown Campus ** Allentown State Hospital ** Lehigh Valley Hospital ** Sacred Heart… …   Wikipedia

• HYDROMORPHES (SOLS) — En pédologie, l’hydromorphie désigne un ensemble de processus résultant de l’action de l’eau envisagée comme facteur principal d’évolution des sols. Sont considérés comme hydromorphes les sols dont la genèse est dominée par un excès d’eau… …   Encyclopédie Universelle