MM592

Site: MM592	Land Unit: Glenthompson Duricrust
*Aust. Soil Class.:* Ferric, Mottled-Mesonatric, Brown SODOSOL(confidence level 3)

General Land Unit Description:
This soil type is the major soil type of the gently undulating plains, rises and low hills of the duricrust surface around Glenthompson. The subsoils tend to be sodic which along with the ferruginous nodules, are a restriction to land use. A minor soil type is a Ferric Brown Chromosol, which may be sodic at depth.

Site Description:

Slope: <2%	Geology: Cainozoic duricrust
Landform pattern: Gently undulating plains and rises	Position in landscape: Broad crest
Internal drainage: Moderately well drained

Soil Profile Morphology

A1	0-15 cm	Dark brown (10YR3/3) clay loam, ferruginous nodules are common, pH 4.5. Clear transition to:
A2	15-45 cm	Pale brown (10YR6/3) silty clay loam, conspicuously bleached (10YR8/1) when dry, ferruginous nodules are abundant. Sharp transition to:
	Subsoil
B21	45-60 cm	Yellowish brown (10YR5/4) medium clay, faint yellowish brown mottles (10YR5/8), ferruginous nodules are abundant. Clear transition to:
B22	60-100+ cm	Light yellowish brown (2.5Y6/4) heavy clay, moderate blocky structure (10-20 mm). pH 7.2

Key profile features:

Bleached A2 horizon
Strongly acidic topsoil
Deeper subsoil dispersive when dry
Ferruginous nodules are abundant in A2 horizon

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