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Site: GL84Land Unit: Digby
Aust. Soil Class.: Ferric, Bleached, Grey KUROSOL (confidence level 2)

Soil pit GL84 auger

General Land Unit Description:
As with the Merino Tablelands land unit, the Digby land unit also occurs on the Cretaceous nonmarine sandstone of the Merino Tablelands. The soils on the Digby land unit differ from the Merino Tablelands land unit as they tend to be slightly more acidic in the top of the subsoil and have more ferruginous nodules (Ferric Brown Chromosols). The division between the two land units is highlighted in recent radiometric imagery. Black Chromosols, Dermosols and Vertosols, similar to the Merino land unit also occur.

Site Description:

Slope: 8%Geology: Cretaceous non-marine sandstone
Landform pattern: Undulating risesPosition in landscape: Lower slope
Internal drainage: Imperfectly drained

Soil Profile Morphology

A10-10 cmDark brown (10YR3/3) sandy loam, weak subangular blocky structure, pH 5.5; transition to:

A210-45 cmBrown (10YR5/3) loamy sand, bleached (10YR8/1) when dry, massive structure, pH 6.5; transition to:

B145-55 cmLight medium clay, ferruginous nodules are abundant, pH 6; diffuse transition to:

B2155-110 cmDark greyish brown (10YR4/2) light medium clay, many distinct yellow and orange mottles, weak to medium subangular blocky structure, pH 5; diffuse transition to:

B22110-140 cmDark greyish brown (10YR4/2) medium clay, many prominent red and orange mottles, weak to medium structure, pH 5; transition to:

Key profile features:

  • Strong texture contrast between topsoil and subsoil
  • Bleached A2 horizon
  • Ferric horizon
  • Mottled subsoil
  • Strongly acidic subsoil
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