MM367

Site: MM367	Land Unit: Richie Hill
*Aust. Soil Class.:* Mottled-Sodic, ?, Brown CHROMOSOL (confidence level 4)

General Land Unit Description:
This unit consists the undulating slopes of Richie Hill north of Streatham. The soils are typically Brown Chromosols on the steeper slopes, and Brown Sodosols on the gentler colluvial slopes (Richie Hill Slopes land unit). There are minor occurrences of Black Chromosols or Dermosols.

Site Description:

Geology: Quaternary basalt	Landform pattern: Undulating rises
Position in landscape: Mid slope	Internal drainage: Imperfectly drained

Soil Profile Morphology

A1	0-20 cm	Dark reddish brown (5YR3/4) clay loam, moderate blocky structure (10-20mm), ferromanganiferous nodules are common, pH 4.9. Clear transition to:
A2	20-25 cm	Reddish brown (5YR4/4) clay loam, ferromanganiferous nodules are common. Sharp transition to:
	Subsoil
B21	25-40 cm	Red (2.5YR4/6) light clay, strong blocky structure (5-10 mm), pH 6.1. Gradual transition to:
B23	60+ cm	Brown (7.5YR4/4) medium clay, red mottles (2.5YR4/6), strong blocky structure (5-10 mm), pH 6.9.

Key profile features:

Strongly acidic topsoil
Strong texture contrast between topsoil and subsoil
Ferromanganiferious nodules are common in topsoil
Mottled subsoil
Topsoil dispersive when worked when wet
Top of subsoil dispersive when worked when wet
Deeper subsoil sodic

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