CSLP7

Location: Cooriemungle

Australian Soil Classification: Melacic, Pipey, Semiaquic, PODOSOL

General Landscape Description: Dissected Plateau.
Site Description: Very gently undulating plain.
Native Vegetation: Pasture, cattle.
Geology: Neogene sediments (Hanson Plain Sand) over Palaeogene sediments.

Image: CSLP7,8,9 Landscape
CSLP7 Landscape

Soil Profile Morphology:

Surface Soil

Ap	0-5 cm	Root mat;	CSLP7 profile.
A11	5-15 cm	Very dark brown (10YR2/2); light sandy clay loam; weak fine sub-angular blocky structure; rough fabric; weak consistence dry; pH 4.4; clear change to:
A12	15-40 cm	Black (2.5Y2.5/1); sandy clay loam; massive; earthy fabric; firm consistence dry; pH 4.4; diffuse change to:
A13	40-60 cm	Very dark grey (10YR3/1); fine sandy clay loam; massive; earthy fabric; weak consistence dry; pH 4.6; sharp change to:
Subsoil



B21s	60-150 cm	White (10YR8/2) with faint strong brown (7.5YR5/8) and brown (10YR4/3) mottles common; clayey coarse sand; massive; earthy fabric; very strong consistence moist; contains very many coarse (6-20 mm in size) iron nodules; discontinuous ferruginous pan present; large organic infills; pH 5.7; gradual change to:
B22	150-170 cm	Black (2.5Y2.5/1) with common amount of coarse light olive brown (2.5Y5/3) and brown (10YR4/3) mottles; fine sandy clay loam; weak coarse prismatic and polyhedral structure; rough fabric; weak consistence moist; contains common medium (2-6 mm in size) iron segregations; large organic infills; pH 4.7; clear change to:
B23s	170-195 cm	Dark greyish brown (10YR4/2), with distinct very pale brown (10YR7/3) and dark yellowish brown (10YR4/4) mottles common; coarse sandy loam; weak coarse sub angular blocky structure; rough fabric; strong consistence moderately moist; contains a few fine gravelly quartz, and a common amount of coarse (6-20 mm in size) ferruginous nodules; discontinuous ferruginous pan present; large organic infills; pH 4.7; clear change to:
2B21/D	195-200+ cm	Light grey (10YR6/2), with prominent yellowish brown (10YR5/8) and very dark grey (2.5Y3/1) mottles common; light clay to light medium clay (very fine sandy); weak medium angular blocky, parting to moderate fine polyhedral structure; smooth fabric; weak consistence moist; pH 4.7.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A11 horizon)	Extremely Acid	Very Low	Non-Sodic	None
Subsoil (B21 horizon 60-150 cm)	Moderately Acid	Very Low	Non-Sodic	None
Very Deep Subsoil (195-200 cm)	Very Strongly Acid	Very Low	Non-Sodic	None

The surface is extremely acid. The subsoil is moderately acid and the very deep subsoil is very strongly acid.

The salinity rating is very low throughout the profile.

Clay content is very low in the surface. The clay content increases in the very deep subsoil.

Exchangeable aluminium varies throughout the profile from low in upper subsoil, to very high in the deeper subsoil.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl₂)	EC (dS/m)	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
Ap	0-5	5.1	4.3	0.39	-	-	-	-
A11	5-15	4.4	3.5	0.06	2.1	0.49	0.17	0.16
A12	15-40	4.4	3.7	<0.05	0.36	0.09	<0.05	0.09
A13	40-60	4.6	4	<0.05	0.13	<0.05	<0.05	0.07
B21s	60-150	5.7	5.2	0.08	0.95	0.11	<0.05	0.08
B22	150-170	4.7	4.2	<0.05	0.06	0.10	<0.05	0.14
B23s	170-195	4.7	4.4	0.05	0.10	0.09	0.07	0.17
2B21/D	195-200	4.7	4.1	0.06	0.13	0.28	0.13	0.27

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)


Ap	0-5	-	1.3	21	<10	59.6	42.1	40	26	3	2
A11	5-15	20	0.31	7.7	110	29	13.3	36	35	8	5
A12	15-40	15	0.096	3.5	230	12.1	5.3	34	42	9	8
A13	40-60	-		2.4	190	21	5.3	36	42	9	9
B21s	60-150	8.9		-	33	23	7.2	31	40	11	15
B22	150-170	-		2.1	190	22.1	10.1	29	35	14	16
B23s	170-195	-			210	36	17.8	-	-	-	-
2B21/D	195-200	15			310	37.8	22.7	18	18	22	42

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

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