GP89

Location: Rosedale

Australian Soil Classification: Episodic, Epipedal, Black VERTOSOL

Great Soils Group: Black Earth (cracking clay)
Map Unit: Crooke

General Landscape Description: First terrace of the Latrobe River.
Site Description: Roadside reserve.
Geology: Late Pleistocene sediments

Image: GP89 Landscape
GP89 Landscape

Soil Profile Morphology:

Surface Soil

A1	0-20cm	Very dark greyish brown (10YR3/2); light clay; strong coarse blocky, parting to moderate medium blocky structure; firm consistence moist; pH 6.3
Subsoil
B21	20-50 cm	Very dark grey (10YR3/1); medium heavy clay; firm consistence moist, pH 5.9:

B22	50-85 cm	Dark grey (!)YR4/1) with few (10%) faint yellowish brown (10YR5/6) mottles; medium heavy clay; slickensides and some lenticular structure present: pH 6.9:
B23	85-100 cm	Grey (10YR5/1) with many (30%) yellowish brown (10YR5/6) mottles, medium heavy clay; slickensides present; very firm consistence moist; pH 7.2.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity
Surface (A1 horizon)	Slightly Acid	High	Sodic
Subsoil (B21 horizon)	Moderately Acid	High	Strongly Sodic
Deeper Subsoil (at 85-100 cm)	Slightly Alkaline	Very High	Strongly Sodic

The surface is slightly acid. The subsoil is moderately acid becoming slightly alkaline at depth.

The salinity rating is high in the surface and upper subsoil, becoming very high in the deeper subsoil.

The surface soil is sodic. The subsoil is strongly sodic.

Moderate clay content that slightly increases with depth.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl₂	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-20	6.3	5.6	0.66
B21	20-50	5.9	5.4	1.7
B22	50-85	6.9	6.5	2.4
B23	85-100	7.2	6.8	2.2

Horizon	Horizon Depth (cm)	Acidity meq/100g	Oxidisable Organic Carbon %	Exchangeable Aluminium mg/kg	Field Capacity pF2.5	Wilting Point pF4.2	Coarse Sand (0.2-2.0 mm)	Fine Sand (0.02-0.2 mm)	Silt (0.002-0.02 mm)	Clay (<0.002 mm)

Profile Described By: Mark Imhof and Ian Sargeant (January 1999).

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