GP88

Location: Moondarra South

Australian Soil Classification: Bleached-mottled, Magnesic, Grey KUROSOL

Map Unit: Boolarra
Soil Type (equivalent to): Boolarra Loam (Poutsma and Turvey, 1979)

General Landscape Description: Crest of rolling low hills.
Site Description: Roadside reserve.
Geology: Moondarra Surface
Native Vegetation: Silvertop Ash (E. Sieberi)

Image: GP88 landscape
GP88 Landscape.

Soil Profile Morphology:

Surface Soil

A1	0-15 cm	Dark grey (10YR4/1); silty clay loam; very firm consistence dry; pH 5.1; clear change to:	GP88 Profile
A2	15-40 cm	Very pale brown (10YR7/3) with few (5-10%) yellow (10YR7/6) mottles; silty clay loam; pH 5.3; clear change to:
Subsoil
B21	40-80 cm	Light grey (10YR7/1) with few (10%) brownish yellow (10YR6/6) mottles; light medium clay (silty); strong coarse blocky parting to moderate coarse polyhedral structure; pH 5.3.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Very Low	Non-Sodic	None
Subsoil (B21 horizon)	Strongly Acid	Very Low	Non-Sodic	None

This profile is strongly acid throughout.

The salinity rating is very low though the whole profile.

The aluminium levels are high throughout the profile.

The clay content is low in the surface, and sharply increases at the A/B interface.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl₂	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-15	5.1	4.1	0.06	1.1	1.0	<0.1	0.1
A2	15-40	5.3	4.3	<0.05	0.3	0.9	<0.1	<0.1
B21	40-80	5.3	4.2	<0.05	0.2	2.0	<0.1	<0.1

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)


A1	0-15	12	1.4	270	28.0	5.5	3.6	33.5	44.5	13.0
A2	15-40	6.7		250	23.7	7.4	2.2	27.5	48.0	22.0
B21	40-80	8.2		310	32.8	18.9	0.4	11.3	37.0	52.0

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

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