SW106

Location: Cooriemungle

Australian Soil Classification: Bleached-Mottled, Eutrophic, Brown DERMOSOL

General Landscape Description: Westerly facing lower slope of rolling rise.
Site Description: Cattle grazing.
Geology: Gellibrand Marl.

Soil Profile Morphology:

Surface Soil

A1	0-5 cm	Very dark brown (10YR3/2); fine sandy clay loam; strong fine polyhedral structure; smooth faced peds; very weak consistence moist; pH 6.4; gradual and wavy change to:
A2	5-20 cm	Light brownish grey (2.5Y6/2) conspicuously bleached (2.5Y7/2d) with common (20%) distinct, medium sized yellowish brown (10YR5/6) mottles and biological mixing; fine sandy loam; massive; weak consistence moderately moist; charcoal evident; pH 6.2; clear and wavy change to:
A3	20-40 cm	Light olive brown (2.5Y5/4) with common (20%) distinct medium sized yellowish brown (10YR5/6) mottles and biological mixing; sporadically bleached; fine sandy clay loam (heavy); very weak medium blocky structure; rough faced peds; firm consistence moderately moist; contains a few (<10%) organic root linings; charcoal evident; pH 6.0; gradual and wavy change to:
Subsoil
B21	40-70 cm	Light olive brown (2.5Y5/4) with common (20%) distinct medium sized olive yellow (10YR6/8) mottles and biological mixing; medium heavy clay; strong medium angular blocky parting to moderate fine polyhedral structure; firm consistence moderately moist; contains a few (<10%) organic root linings; pH 5.8; gradual and wavy change to:
B22	70-90 cm	Light yellowish brown (2.5Y6/3) with many (30%) distinct, medium sized olive yellow (10YR5/8) mottles and biological mixing; medium heavy clay; strong coarse polyhedral structure; smooth faced peds; very firm consistence moist; contains a few (10%) organic root linings; some organic cutans and cracking evident; pH 5.8; diffuse and wavy change to:
B23	90-140+ cm	Pale olive (5Y6/3) with many (30%) distinct, medium sized olive yellow (10YR6/8) mottles and biological mixing; medium heavy clay; very firm consistence moist; contains a few (10%) organic root linings; some organic cutans evident; pH 6.0.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity
Surface (A1 horizon)	Slightly Acid	Low	Non-Sodic
Subsoil (B21 horizon)	Moderately Acid	Very Low	Non-Sodic
Deeper Subsoil (at 100 cm)	Moderately Acid	Very Low	-

The surface horizon is slightly acid. The subsoil is moderately acid throughout.

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

The exchangeable aluminium levels in the surface are low. At 55 cm depth the levels increase and become very high at depth.

The clay content increases gradually with depth.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl2	EC (dS/m)	NaCl %	Exchangeable Cations
						Ca	Mg	K	Na
						meq/100g
A1	0-5	6.4	6.3	0.27	<0.01	13	1.9	0.3	0.1
A2	5-20	6.2	5.7	0.08		5.8	2.7	0.12	0.37
A3	20-40	6	5	0.05		5.6	4.1	0.13	0.5
B21	40-70	5.8	4.7	0.06		5.9	5.6	0.17	0.75
B22	70-90	5.8	4.4	0.1
B23	90-140	6	4.7	0.1

Horizon	Horizon Depth (cm)	Exchangeable Acidity meq/100g	Exchangeable Aluminium mg/kg	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	0-5		12	3	46	27	16
A2	5-20	8.6	53	0	47	24	23
A3	20-40	8.9	210	0	41	21	34
B21	40-70	12	230	0	32	18	45
B22	70-90
B23	90-140

Profile Described By: Natalie Baxter, Nathan Robinson and Richard McEwan (May 2001).

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