CSLP5

Location: Simpson

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

General Landscape Description: Rises.
Site Description: Mid slope of a rise slope within a grazing paddock.
Geology: Paleogene Sediments - Gellibrand Marl and colluvium.

Image: CSLP4 5 6 Landscape
CSLP5 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 weak fine sub-angular blocky structure; rough fabric; firm consistence dry; many roots present; charcoal evident; pH 5.1; abrupt change to:	CSLP5 Profile.
A2	9-25 cm	Pale brown (10YR6/3) conspicuously bleached (10YR8/3dry), with faint brownish yellow (10YR6/6) mottles common; silty clay loam; massive; earthy fabric; very firm consistence dry; contains a few coarse ferruginous concretions; many roots present; charcoal evident; pH 5.3; clear and wavy change to:
Subsoil
B21	25-45 cm	Light olive brown (2.5Y5/3) with distinct yellowish brown (10YR5/6) mottles common; medium heavy clay; strong medium angular blocky, parting to moderate fine angular blocky structure; smooth fabric; very firm consistence moderately moist; slickensides evident; contains many roots; pH 5.1; gradual and wavy change to:
B22	45-60 cm	Greyish brown (2.5Y5/2), with many distinct yellowish brown (10YR5/6) and faint yellowish red (5YR5/6) mottles; heavy clay; moderate coarse prismatic, parting to moderate fine prismatic structure; slickensides evident; smooth fabric; strong consistence moderately moist; roots common; pH 4.9; clear change to:
B23	60-110 cm	Grey (5Y5/1) with many distinct strong brown (7.5YR5/6) and yellowish red (5YR5/6) mottles; heavy clay; moderate coarse prismatic, parting to medium prismatic structure; slickensides evident; smooth fabric; very firm consistence moderately moist; few roots present; pH 5.0; diffuse change to:
B3	110-140 cm	Grey (5Y6/1) with many prominent coarse strong brown (7.5YR5/6) and a few distinct yellowish red (5YR5/6) mottles; medium clay; weak structure; smooth fabric; firm consistence moist; pH 5.2.
NOTE: Some weak columnar structure in subsoil.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Low	Non-Sodic	None¹
Subsoil (B21 horizon)	Strongly Acid	Very Low	Non-Sodic	None¹
Deeper Subsoil (at 60-110 cm)	Strongly Acid	Low	Sodic	None

¹ Slight dispersion after remoulding.

Graph: CSLP5

The whole profile is strongly acid.

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

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

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

Aluminium content increases from low in the surface, to very high at 45-60 cm. After 60 cm aluminium levels drop to low in the deeper subsoil.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl2	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-9	5.1	4.6	0.13	4.9	1.8	0.27	0.45
A2	9-25	5.3	4.6	0.09	2.5	1.6	0.31	0.35
B21	25-45	5.1	4.3	0.12	3.4	3.8	0.66	0.62
B22	45-60	4.9	4.3	0.16	3.4	5.5	0.41	0.81
B23	60-110	5	4.4	0.23	3.9	5.8	0.2	1.5
B24	110-140	5.2	4.7	0.45	6	6.7	0.13	1.7

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	0.4	5.5	13	40	36.3	13.1	10	49	20	13
A2	9-25		0.97	7.4	66	25.5	8.8	4	51	17	24
B21	25-45		0.61	10	250	33.3	17.6	3	40	14	42
B22	45-60			10	290	38.7	20.7	3	26	11	58
B23	60-110			9.4	180	36.4	19.2	3	28	10	58
B24	110-140			6.2	38	39.4	20.4	2	29	10	59

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

Page top