MM240

Site: MM240	Land Unit: Terang Sedimentary
*Aust. Soil Class.:* Ferric, Mottled-Subnatric, Brown SODOSOL (confidence level 2)

General Land Unit Description:
The unit consists of gently undulating plains on Tertiary sediments, predominantly in the Mortlake– Terang area. The dominant soil type is a Brown Chromosol, either with a mottled subsoil (MM474) or a bleached A2 horizon and a ferric horizon (MM472). There are minor occurrences of Ferric Brown Sodosols which is represented by this site.

Site Description:

Geology: Tertiary sedimentary	Landform pattern: Level to gently undulating plains
Position in landscape: Flat	Internal drainage: Imperfectly drained

Soil Profile Morphology

A1	0-15 cm	Dark brown (10YR3/3) fine sandy clay loam, hard-setting surface, apedal, weak consistence when dry, pH 5.0. Clear transition to:
A2	15-30 cm	Greyish brown (10YR5/2), sporadically bleached (10YR7/2) when dry, ferromanganiferous nodules are abundant, weak consistence when dry, pH 5.9. Sharp transition to:
	Subsoil
B21	30-110 cm	Yellowish brown (10YR5/6) medium clay, red mottles, strong blocky structure (10-20 mm), firm consistence when moist, pH 6.3. Gradual transition to:
B22	110+ cm	Yellowish brown (10YR5/6), red mottles, strong blocky structure, coarse fragments (200-600 mm), very firm consistence when moist, pH(water) 7.3.

Key profile features:

Strongly acidic topsoil
Strong texture contrast between topsoil and subsoil
Sodic subsoil
Many ferromanganiferous nodules

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