TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

EPIPEDON [9 records]

Record 1 2010-11-23

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[Mollic epipedon is] a thick, dark surface layer, more than 50 per cent base saturated(dominantly with bivalent cations), having a narrow C/N ratio(17/1 or less in virgin state and 13/1 and less with cultivated soils), a strong soil structure, a relatively soft consistency when dry, and less than 250 ppm of P2O5 soluble in critic acid.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

«Parmi les épipédons», la 7e Approximation distingue les formes suivantes d'accumulation d'humus : - «l'épipédon mollique» à humus calcique [...]

Spanish

Save record 1

Record 2 2004-10-20

English

Subject field(s)
  • Soil Science
DEF

A diagnostic surface horizon which includes the upper part of the soil that is darkened by organic matter, or the upper eluvial horizons or both.

French

Domaine(s)
  • Science du sol
DEF

[...] horizons diagnostic de surface plus ou moins imprégnés d'humus: ils correspondent à l'ensemble des horizons A, parfois même à la partie supérieure de B, s'il est imprégné d'humus.

Spanish

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

Horizonte orgánico superficial.

Save record 2

Record 3 1998-09-30

English

Subject field(s)
  • Soil Mechanics (Engineering)
  • Soil Science
  • Soil Tests (Construction)
DEF

a test in which a cylindrical specimen of soil umbric epipedon encased in an impervious membrane is subjected to a confining pressure and then loaded.

French

Domaine(s)
  • Mécanique des sols
  • Science du sol
  • Essais du sol (Construction)
DEF

Essai dans lequel un échantillon de sol cylindrique, enveloppé dans une membrane étanche, est soumis à une étreinte latérale puis chargé axialement jusqu'à rupture.

CONT

Essai de cisaillement à l'appareil triaxial (...) L'éprouvette de sol, en forme de tronc de cylindre (...) est placée sur une embase métallique munie d'une pierre poreuse, à l'intérieur d'une enceinte étanche en plexiglas. Sur sa surface latérale, l'éprouvette est entourée d'une enveloppe imperméable. On exerce : une pression hydrostatique (...), une force verticale (...)

Spanish

Save record 3

Record 4 1977-08-26

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[The ochric epipedon is] A light-colored surface horizon generally low in organic matter which includes the eluvial layers near the surface. It is often hard and massive when dry. Although characteristic of Aridisols, it is found in several of the other soil orders.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

"Parmi les épipédons", la 7e Approximation distingue les formes suivantes d'accumulation d'humus: (...) "l'épipédon ochrique": horizon de surface pauvre en matière organique (...)

Spanish

Save record 4

Record 5 1977-08-26

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[Umbric epipedon is] a thick, dark surface layer which is less than 50 per cent saturated with bases. And soils have umbric epipedons.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

"Parmi les épipédons", la 7e Approximation distingue les formes suivantes d'accumulation d'humus. (...) "l'épipédon umbrique" à humus acide (...)

Spanish

Save record 5

Record 6 1977-08-26

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[Anthropic epipedon is] a thick, dark surface horizon, which is more than 50 per cent saturated with bases, has a narrow CIN ratio and more than 250 ppm of P2O5 soluble in citric acid. It is formed under long continued cultivation where large amounts of organic matter and fertilizers have been added.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

"Parmi les épipédons", la 7e Approximation distingue les formes suivantes d'accumulation d'humus: (...) "l'épipédon anthropique et l'épipédon de plaggen" dus à l'influence anthropique.

Spanish

Save record 6

Record 7 1977-08-26

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[Histic epipedon is] A horizon at or near the surface, saturated with water at some season and containing a minimum of 20 per cent organic matter if no clay is present and at least 30 percent organic matter if it has 50 per cent or more of clay.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

"Parmi les épipédons", la 7e Approximation distingue les formes suivantes d'accumulation d'humus: (...) "l'épipédon histique": accumulation organique d'origine hydromorphe (tourbe) (...)

Spanish

Save record 7

Record 8 1977-08-26

English

Subject field(s)
  • Soil Science
  • Geology
OBS

[Plaggen epipedon is a] Man-made surface layer more than 20 inches thick and produced by long continued manuring. Common in Europe but unknown in the U. S.

French

Domaine(s)
  • Science du sol
  • Géologie
OBS

"Parmi les épipédons", la 7e Approximation distingue les formes suivantes d'accumulation d'humus: (...) "l'épipédon anthropique et l'épipédon de plaggen" dus à l'influence anthropique.

Spanish

Save record 8

Record 9 1975-03-11

English

Subject field(s)
  • Soil Science
DEF

A thick, dark surface layer which is less than 50 per cent saturated with bases.

CONT

Ando soils have umbric epipedon.

French

Domaine(s)
  • Science du sol
OBS

Comparable en tous points à l'épipedon mollique, mais la saturation en bases est inférieure à 50 % et le rapport C/N est supérieur à 17.

Spanish

Save record 9

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