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HARDPAN [8 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2008-09-22

English

Subject field(s)
  • Erosion and Weathering (Geol.)
CONT

Commonly the base of the stream-mouth bar is a scour surface. The upper surface of the stream-mouth bar is a marine-flooding surface that commonly exhibits burrowing by marine organisms (Arenicolites).

CONT

... the topsoil on some fields has completely blown away, exposing hardpan. The scoured surface resembles sandstone.

OBS

scour surface: term used at Natural Resources Canada - Earth Sciences Sector.

PHR

Ice-scoured surface.

French

Domaine(s)
  • Érosion et corrosion (Géologie)
OBS

surface décapée : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

PHR

Roche à surface décapée par les glaces .

Spanish

Save record 1

Record 2 2005-11-22

English

Subject field(s)
  • Soil Science
DEF

A dense, hard layer in the subsoil that obstructs penetration of roots and water.

OBS

Geologically [hardpan] may be regarded as rock in the process of formation.

French

Domaine(s)
  • Science du sol
DEF

Couche dense et dure dans le sous-sol, proche de la surface, qui empêche la pénétration des racines et de l'eau.

CONT

Dans le sous-sol, constitution, vers 20-25 centimètres, d'une zone tassée de 3 à 5 centimètres, d'épaisseur, créant une discontinuité dans les propriétés du sol et augmentant la difficulté d'infiltration de l'eau.

Spanish

Campo(s) temático(s)
  • Ciencia del suelo
DEF

Estrato denso y duro del subsuelo, cercano a la superficie que impide la penetración de las raíces y el agua.

Save record 2

Record 3 2003-09-02

English

Subject field(s)
  • Soil Science
  • Geology
OBS

In early U-S. classification systems, a group of zonal soils having a brownish-gray surface horizon and a light-colored subsurface overlying a layer of carbonate accumulation and, sometimes, hardpan. It is developed under conditions of temperate to cool aridity, and under mixed shrub vegetation.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

Près des tchernozems se placent [...] "les sols gris semi désertiques ou sierozems" (Soudan, Asie centrale): très pauvres en humus, couche supérieure plus claire que le reste.

Spanish

Campo(s) temático(s)
  • Ciencia del suelo
  • Geología
DEF

Suelo isohúmico de zonas áridas, muy calizo y probe en materia orgánica.

Save record 3

Record 4 2003-08-12

English

Subject field(s)
  • Soil Science
  • Geology
DEF

In early U. S. classification systems, a group of zonal soils having a light-colored surface horizon overlying calcareous material and, commonly, a hardpan.

OBS

It is developed under conditions of aridity, warm to cool climate, and scant scrub vegetation.

French

Domaine(s)
  • Science du sol
  • Géologie
CONT

Les sols désertiques : [l'indice climatérique] voisin de 10. Pas de lessivage. Mouvement ascendant immédiat. Altération chimique réduite.

OBS

Le sol désertique n'est pas pour autant stérile.

Spanish

Campo(s) temático(s)
  • Ciencia del suelo
  • Geología
Save record 4

Record 5 1999-12-29

English

Subject field(s)
  • Soil Science
DEF

An intrazonal, hydromorphic group of soils having a leached surface layer above a definite clay pan or hardpan.

French

Domaine(s)
  • Science du sol
OBS

Termes empruntés à l'anglais.

Spanish

Save record 5

Record 6 1992-06-30

English

Subject field(s)
  • Landscape Architecture
CONT

Transplanting procedures.... The hole should be fully adequate to accommodate the depth and spread of all roots. Extraneous material uncovered in this digging, such as construction debris, rocks, hardpan, tree branches, and sod clumps, should be discarded as restrictive to normal growth.

French

Domaine(s)
  • Architecture paysagère

Spanish

Save record 6

Record 7 1987-08-07

English

Subject field(s)
  • Mining Equipment and Tools
  • Boring and Drilling (Mines)
DEF

A steel, chisel-shaped cutting-edged bit designed to be coupled to a string of drill rods, and used to fragment, by impact, boulders, hardpan, and lost core in a borehole.

French

Domaine(s)
  • Outillage et équipement (Exploitation minière)
  • Sondage et forage miniers
OBS

Le trépan ordinaire a la forme d'un burin.

Spanish

Save record 7

Record 8 1978-10-18

English

Subject field(s)
  • Soil Science
DEF

A dense, natural subsurface layer of soil whose hardness and relatively slow permeability to water are chiefly due to extreme density or compactness rather than to high clay content(as claypan) or to cementation(as in hardpan). It appears indurated when dry, but shows a moderate to weak brittleness when moist; it contains much silt and sand, but little clay and organic matter.

French

Domaine(s)
  • Science du sol
DEF

Horizon très tassé.

DEF

(...) horizons à faible porosité, forte cohésion et densité élevée susceptibles de se rompre en éclats.

OBS

La première définition a été fournie par l'Ecole nationale supérieure agronomique de Rennes (77 04).

Spanish

Save record 8

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