CSLP8

Location: Cooriemungle

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

General Landscape Description: Low hill (hillock) on a valley side (slumped material).
Site Description: Lower mid slope of an undulating hillslope.
Vegetation: Pasture.
Geology: Gellibrand Marl - Palaeogene sediments.

Image: CSLP7,8,9 Landscape
CSLP8 Landscape

Soil Profile Morphology:

Surface Soil

A11	0-10 cm	Very dark greyish brown (2.5Y3/2); fine sandy loam; weak fine sub-angular blocky parting to weak very fine sub-angular blocky structure; weak consistence moderately moist; pH 5.3; clear and wavy change to:	CSLP8 profile.
A12	10-20 cm	Dark greyish brown (2.5Y4/2) with a few fine distinct dark red (2.5YR3/6) mottles; clay loam, fine sandy; weak medium polyhedral parting to weak fine polyhedral structure; weak consistence moist; minor charcoal evident; pH 5.3; gradual and wavy change to:
Subsoil



B1	20-30 cm	Light greyish brown (2.5Y6/2) with a common amount of fine distinct strong brown (7.5YR5/8) and dark red (2.5YR3/6) mottles; light clay; weak medium polyhedral, parting to weak fine polyhedral structure; firm consistence moist; pH 5.4; abrupt and wavy change to:
B21	30-60 cm	Light olive brown (2.5Y5/3) with a few medium distinct yellowish brown (10YR5/6) mottles; light medium clay; strong coarse prismatic, parting to strong fine angular blocky structure; weak consistence moist; pH 5.1; gradual and wavy change to:
B22	60-90 cm	Light greyish brown (2.5Y6/2) with many coarse prominent brownish yellow (10YR6/8) mottles; medium clay; strong coarse lenticular, parting to moderate fine polyhedral and lenticular structure; slickensides common; contains soft segregations; pH 5.1; smooth and diffuse change to:
B23	90-130 cm	Light grey (2.5Y7/1) with many medium prominent reddish yellow (7.5YR6/8) mottles; medium heavy clay; moderate very coarse lenticular structure; slickensides common; contains soft segregations; pH 4.8; smooth and diffuse change to:
B24	130-145+ cm	Light grey (2.5Y7/1) with many fine prominent strong brown (7.5YR5/8) mottles; medium heavy clay; many slickensides evident; contains soft segregations; pH 4.9.

Key Profile Features:

· Large crack from the surface running to 70 cm into the subsoil.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A11 horizon) Surface (A12 horizon)	Strongly Acid	Very Low	Non-Sodic	None None ¹
Upper Subsoil (B21 horizon)	Strongly Acid	Very Low	Non-Sodic	None
Deeper Subsoil (at 90-130 cm)	Very Strongly Acid	Very Low	Sodic	None

¹Slight to moderate dispersion after remoulding.

Graph: CSLP8

The surface horizon and the upper subsoil is strongly acid. The deeper subsoil is very strongly acid.

The salinity rating is very low throughout the profile.

The clay content is low in the surface and gradually increases with depth.

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

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl₂)	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A11	0-10	5.3	4.6	0.08	4.1	2.2	0.39	0.50
A12	10-20	5.3	4.4	0.05	2.9	2.1	0.31	0.37
B1	20-30	5.4	4.4	<0.05	2.4	2.4	0.34	0.33
B21	30-60	5.1	4.1	0.06	1.8	3.5	0.36	0.46
B22	60-90	5.1	4.2	0.1	1.6	4.8	0.25	0.79
B23	90-130	4.8	4.1	0.12	2.5	5.6	0.19	1.5
B24	130-145+	4.9	4.1	0.15	3.4	5.8	0.17	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)


A11	0-10	17	0.51	6.8	91	36.1	14.4	10	46	20	8
A12	10-20	-	0.11	2.0	120	30.2	10.5	3	50	22	17
B1	20-30	8.5		1.0	160	29.1	10.5	2	53	21	18
B21	30-60	10			420	33.9	14.1	2	42	20	32
B22	60-90				380	33.8	16.8	2	39	14	42
B23	90-130				450	37.7	19.8	1	32	13	49
B24	130-145+				350	40.8	21.8	1	30	14	52

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

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