GL116

Site: GL116	Land Unit: Wannon Alluvial
*Aust. Soil Class.:* Mottled-Sodic, Eutrophic, Black DERMOSOL (confidence level 1)

Soil pit GL116 auger

General Land Unit Description:
This land unit occurs on the alluvial plains of the Wannon River and its tributaries in the south-west of the study area. The major soil type used to represent this unit is a Black Dermosol, although Sodic Black Vertosols are co-dominant.

Site Description:

Slope: 1%	Geology: Quaternaly alluvial
Landform pattern: Level plain	Position in landscape: Plain
Internal drainage: Imperfectly to poorly drained

Soil Profile Morphology

A1	0-15 cm	Very dark brown (10YR2/2) sandy loam, a few faint yellow and orange oxidised root mottles, weak subangular blocky structure (10-15 mm), very firm consistence when dry, pH 5.2. Transition to:
	Subsoil
B11	15-40 cm	Very dark brown (10YR2/2) clay loam, many faint orange and yellow oxidised root mottles, weak to massive structure, strong consistence when dry, pH 5.8. Transition to:
B12	40-100 cm	Very dark brown (10YR2/2) clay loam, many very faint orange and yellow mottles, weak subangular blocky structure (10-15 mm), strong consistence when dry, pH 6.9. Transition to:
B21	100-130 cm	Dark greyish brown (2.5Y4/2), light clay, many very faint yellow mottles, weak structure, strong consistence when dry, pH 8.2. Transition to:
B22	130-150 cm	Olive brown (2.5YR4/3) light clay, many faint yellow mottles, moderate subangular blocky structure (5-10 mm), strong consistence when dry, pH 8.4. Transition to:
B23	150-200+ cm	Dark greyish brown (2.5Y4/2) light medium clay, many distinct orange mottles, moderate subangular blocky structure (5-10 mm), strong consistence when dry, pH 8.1.

Key profile features:

Acidic topsoil
Strongly sodic at depth
Mottled subsoil
Subsoil dispersive when dry

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