CSLP9

Location: Cooriemungle

Australian Soil Classification: Vertic (& Acidic-Sodic), Eutrophic, Brown DERMOSOL

General Landscape Description: Low Hills.
Site Description: Lower slope of a footslope.
Vegetation: Pasture.
Geology: Neogene Gellibrand Marl / Quaternary colluvium.

Image: CSLP7,8,9 Landscape
CSLP9 Landscape

Soil Profile Morphology:

Surface Soil

A1	0-10 cm	Very dark brown (10YR2/2); loam; weak fine sub-angular blocky structure; rough fabric; very weak consistence moderately moist; many fine roots; pH 5.4; clear and wavy change to:	CSLP9 profile.
Subsoil



B1	10-35 cm	Greyish brown (2.5Y5/2) with a common amount of fine faint yellowish brown (10YR5/8) mottles; light clay fine sandy; weak coarse sub-angular blocky and polyhedral structure; rough fabric; weak consistence moderately moist; occasional dark band deposits; many fine roots; pH 5.3; clear and wavy change to:
B21	30-65 cm	Light olive brown (2.5Y5/3) with a common amount of medium distinct yellowish brown (10YR5/6) mottles; medium clay; strong coarse angular blocky, parting to strong fine angular blocky structure; smooth fabric; weak consistence moderately moist; fine roots common; pH 5.1; clear and wavy change to:
B22	65-90 cm	Light grey (2.5Y7/1) with many medium distinct light yellowish brown (10YR6/4) and yellowish red (5YR5/8) mottles; medium heavy clay; weak medium prismatic structure; smooth fabric; firm consistence moist; slickensides evident; contains a few fine roots; pH 5.0; diffuse change to:
B23	90-130 cm	Light grey (2.5Y7/1) with many medium prominent light yellowish brown (2.5Y6/4) and yellowish red (5YR5/8) mottles; medium heavy clay; strong medium lenticular and prismatic, parting to fine polyheral structure; smooth fabric; firm consistence moist; slickensides evident; soft segregations evident; pH 5.1; gradual and wavy change to:
B24	130-150+ cm	Light grey (2.5Y7/1) with many coarse prominent yellowish red (5YR5/8) and light yellowish brown (2.5Y6/4) mottles; medium clay; strong medium lenticular, parting to moderate fine angular blocky structure; smooth fabric; firm consistence wet; soft segregations evident; pH 5.2.

Key Profile Features:

· Large cracks in profile.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Low	Non-Sodic	None
Subsoil (B21 horizon)	Strongly Acid	Very Low	Non-Sodic	None
Deeper Subsoil (at 90-130 cm)	Strongly Acid	Very Low	Sodic	None

NOTE: The B1 horizon has no dry aggregate dispersion but shows slight dispersion after remoulding.

Graph: CSLP9

This profile is strongly acid throughout.

The salinity rating is low to very low throughout the soil profile.

The profile is non-sodic becoming sodic at 1 metres depth.

The clay content in the surface is low and slowly increases with depth becoming high in the deeper subsoil.

The exchangeable aluminium levels in the surface soil are low. Levels are high in the subsoil.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl₂)	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-10	5.4	4.8	0.13	5.7	3.1	0.48	0.5
B1	10-35	5.3	4.4	<0.05	2.2	1.2	0.31	0.25
B21	35-65	5.1	4.1	<0.05	2.9	4.5	0.29	0.51
B22	65-90	5.0	4.2	0.08	3.9	7.0	0.2	0.89
B23	90-130	5.1	4.3	0.12	5.3	6.6	0.19	1.5
B24	130-150+	5.2	4.4	0.15	6.5	6.6	0.25	2.0

Horizon	Horizon Depth (cm)	Exchangeable Acidity meq/100g	Total Nitrogen %	Organic Carbon g/100g	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	0-10	16	0.64	7.6	17	27.9	14.4	13	38	13	18
B1	10-35	8.1	0.14	2.3	98	26.7	7.3	7	49	13	25
B21	35-65	12			480	37.3	17.1	3	30	15	48
B22	65-90				400	42.4	20.0	2	24	12	58
B23	90-130				400	39.5	25.5	3	25.	15	55
B24	130-150+				130	37.3	18.7	4	30	15	51

Profile Described By: David Rees, Nathan Robinson (March 2009).

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