CSLP6

Location: Simpson

Australian Soil Classification: Bleached-Sodic, Eutrophic, Brown KUROSOL

General Landscape Description: Hill slope or scarp face.
Site Description: Lower slope within a grazing paddock.
Geology: Paleogene Sediments - Gellibrand Marl and colluvium.

Image: CSLP6 Landscape
CSLP6 Landscape

Soil Profile Morphology:

Surface Soil

A1	0-9 cm	Very dark greyish brown (10YR3/2); fine sandy loam; weak coarse sub-angular blocky, parting to moderate fine sub-angular blocky structure; earthy fabric; very firm consistence dry; many roots present; pH 5.2; clear and wavy change to:	CSLP6 Profile.
A2	9-25 cm	Light olive brown (2.5Y5/3) conspicuously bleached (10YR7/2dry), with faint strong brown (7.5YR4/6) and yellowish brown (10YR5/6) mottles common; silty clay loam; weak very coarse sub-angular blocky structure; earthy fabric; very firm consistence dry; contains very few, fine sized, ferruginous concretions; many roots present; pH 4.9; clear and wavy change to:
Subsoil
B21	25-50 cm	Light olive brown (2.5Y5/3), with a few faint yellowish brown (10YR5/6) and strong brown (7.5YR4/6) mottles; medium heavy clay; moderate very coarse prismatic, parting to strong medium angular blocky structure; smooth fabric; firm consistence moderately moist; many roots present; pH 5.2; gradual change to:
B22	50-75 cm	Light olive brown (2.5Y5/3), with many distinct yellowish brown (10YR5/8) mottles; heavy clay; moderate coarse prismatic, parting to moderate medium prismatic structure; slight slickensides evident; smooth fabric; firm consistence moist; a common amount of roots present; pH 5.0; gradual change to:
B23	75-110 cm	Light grey (2.5Y6/1), with many prominent strong brown (7.5YR5/8) and a few distinct red (2.5YR5/8) mottles; heavy clay; weak very coarse polyhedral and lenticular, parting to moderate fine polyhedral structure; smooth fabric; firm consistence moist; very few roots present; pH 5.0; diffuse change to:
B24	110-160 cm	Light grey (2.5Y7/1), with prominent yellowish red (5YR5/6) and reddish yellow (7.5YR4/6) mottles; heavy clay; weak very coarse polyhedral and lenticular, parting to weak medium polyhedral and lenticular structure; smooth fabric; firm consistence moist; very few roots present; pH 5.2.
NOTE: Some weak columnar structure in subsoil.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Very Low	Non-Sodic	None¹
Subsoil (B21 horizon)	Strongly Acid	Very Low	Non-Sodic	None
Deeper Subsoil (at 75-110 cm)	Strongly Acid	Low	Sodic	None

¹ Moderate dispersion after remoulding.

Graph: CSLP6

This entire profile is strongly acid.

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

The surface and upper subsoil are non-sodic. The deeper subsoil is sodic.

The clay content increases significantly at the A/B horizon boundary.

The exchangeable aluminium levels in the surface are low increasing to very high at 50-70 cm before decreasing
with depth.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl2	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-9	5.2	4.4	0.06	2.3	1.5	0.26	0.26
A2	9-25	4.9	4.4	0.17	6.9	1.7	0.44	0.3
B21	25-50	5.2	4.4	0.09	4.6	5	0.52	0.54
B22	50-75	5	4.4	0.13	4.5	5.8	0.41	0.86
B23	75-110	5	4.3	0.22	7.1	8.7	0.37	2.5
B24	110-160	5.2	4.6	0.36	6.5	7.6	0.2	2.5

Horizon	Horizon Depth (cm)	Total Nitrogen %	Organic Carbon g/100g	Exchangeable Acidity meq/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	0-9	0.072	1	8.2	140	27.0	10.1	<1.0	54	20	24
A2	9-25	0.66	8.9	18	61	48.1	19.6	12	41	16	23
B21	25-50		0.64	11	210	35.9	18.5	<1.0	32	18	46
B22	50-75			11	250	38.1	19.9	<1.0	30	11	58
B23	75-110			8.2	180	42.5	21.2	<1.0	27	15	53
B24	110-160			8.1	40	44.6	21.9	<1.0	28	15	54

Profile Described By: David Rees, Michelle Davey, Nathan Robinson (November 2008).

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