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GL159

Site: GL159Land Unit: Dundas Redgum
Aust. Soil Class.: Ferric (Reticulate), Eutrophic, Yellow CHROMOSOL (confidence level 1)

Soil pit GL159 landscapeGeneral Land Unit Description:
The flat surface of the Dundas Tablelands predominantly consists of Brown Chromosols and to a lesser extent Yellow Chromosols with a ferric horizon, typically occurring above the clay subsoil. The soil is commonly developed over a highly weathered mottled zone. This red and white mottling, sometimes referred to as ‘tiger mottles’, is thought to be the result of deep chemical weathering which occurred during the late Tertiary period. Red gums are the dominant vegetation found on this surface.

Site Description:

Slope: 1%Geology: Cainozoic duricrust
Landform pattern: PlainPosition in landscape: Flat
Internal drainage: Imperfectly drained

Soil Profile Morphology

A10-15 cmVery dark greyish brown (10YR3/2) loam, fine sandy to sandy clay loam, weak blocky structure (10-20 mm), firm consistence when dry, very few fine ferruginous nodules, pH 5.4. Abrupt to clear transition to:Soil pit GL159 profile
A2115-25 cmBrown (10YR4/3) fine sandy loam, massive, firm consistence when moist, a few fine ferruginous nodules, pH 5.8. Clear transition to:
A2225-35 cmDark yellowish brown (10YR3/4) loam, fine sandy, massive structure, firm consistence when moist, many fine ferruginous nodules, pH 6.3. Clear and wavy transition to:
Subsoil
B235-50 cmBrownish yellow (10YR6/6) medium heavy clay, faint coarse yellowish brown (10YR5/6) mottles are common, weak polyhedral structure (10-20 mm), firm when moist, few medium ferruginous nodules and very few coarse manganiferous nodules, pH 6.9. Clear and wavy transition to:
B350-75 cmYellowish brown (10YR5/4) medium heavy clay, many prominent coarse dark red (2.5YR3/6) mottles, strong subangular blocky structure (5-10 mm), firm when moist, many medium ferruginous nodules and course manganiferous nodules are common, pH 7.0. Clear transition to:
BC75-180 cmTiger mottling present.

Key profile features:

  • Acidic topsoil
  • A2 dispersive when worked when wet
  • Ferric horizon
  • Mottled subsoil
  • Tiger mottles
Soil pit GL159 graphs
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