MM583

Site: MM583	Land Unit: Glenthompson Metasediments
*Aust. Soil Class.:* Bleached-Sodic, ?, Brown CHROMOSOL (confidence level 3)

General Land Unit Description:
This land unit occurs mainly around Glenthompson, although there are scattered occurrences around Balmoral. The landscape is mainly undulating rises with some gentle colluvial slopes. The major soil type on the rises and low hills is a Chromosol, which is commonly sodic at depth (represented by this site). A dominant soil type on the gentle slopes tends to be a Brown Sodosol (MM578). A codominant soil type on the gentle slopes, which is often found in association with the Sodosols, is a Kurosol, which is often sodic at depth (MM580).

Site Description:

Geology: Coarse metasediments	Landform pattern: Rising and low hills
Position in landscape: Mid slope	Internal drainage: Moderately well drained

Soil Profile Morphology

A1	0-25 cm	Dark greyish brown (10YR4/2) fine sandy clay loam, massive structure, pH 5.3. Clear transition to:
A2	25-30 cm	Fine sandy clay loam, sporadically bleached (10YR7/2) when dry, massive structure. Clear transition to:
	Subsoil
B21	35-50 cm	Yellowish brown (10YR5/6) heavy clay, red (2.5YR4/6) mottles, strong blocky structure (10-20 mm), pH 5.6. Transition to:
B22	50+ cm	Yellowish brown (10YR5/6) heavy clay, red mottles, strong blocky structure (10-20 mm), pH 6.0.

Key profile features:

Strongly acidic topsoil
Strong texture contrast between topsoil and subsoil
Mottled subsoil
Topsoil dispersive when dry
Subsoil dispersive when worked when wet

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