GRES662

Location: Tambo Mouth

Australian Soil Classification: Melanic-Sodic, Eutrophic, Brown DERMOSOL

Map Unit: Lindenow (Component 1).
Previous Site Name: AL25

General Landscape Description: Delta.
Site Description: 1% slope on river delta.
Land Use: Grazing on annual pasture.
Native Vegetation: Dry valley forest, minor areas of floodplain reed-bed.
Geology: Recent alluvium.

Soil Profile Morphology:

Surface Soil

A11	0 – 20 cm	Very dark brown (10YR2/2); silty loam; moderate crumb structure; friable consistence when moist; gradual and wavy change to:
A12	20 – 35 cm	Black (10YR2/1); silty clay loam; moderate crumb structure; friable consistence moist; clear and smooth change to:
Subsoil
C1	35 – 46 cm	Dark brown (10YR4/3), abundant distinct grey (5-15 mm) mottles; silty clay loam; massive; friable consistence moist; clear and smooth change to:
C2	46 – 68 cm	Dark brown (10YR4/3), abundant distinct grey (5-15 mm) mottles; loamy sand; massive; firm consistence moist; clear change to:
C3	68 – 90 cm	Dark yellowish brown (10YR4/6), abundant prominent grey (5 -15 mm) mottles; silty clay loam; massive; very firm consistence moist.

Note: Mica throughout the profile.

Key Profile Features:

Apart from a sand layer ate 46 to 68 cm, there was little change in the clay content down the profile.

Chemical and Physical Analysis:

Horizon	Horizon Depth (cm)	pH (water)	EC dS/m	Organic Carbon %	Total Nitrogen %	Free Fe₂O₃ % w/w	Exch. Acididty meq/100g	Exchangeable Cations				Gravel %	Coarse Sand (0.2-2.0 mm) %	Fine Sand (0.02-0.2 mm) %	Silt (0.002-0.02 mm) %	Clay (<0.002 mm) %
								Ca	Mg	K	Na
								meq/100g
A11	0-10	5.4	0.06	3.9	0.53		29.3	2.7	3.1	0.9	0.7	0	2	34	22	19
A11	10-20	5.6	0.02	4.0	0.33		27.7	1.8	2.1	0.5	0.6	0	2	41	24	19
A12	30-35	6.2	0.02	1.6	0.14		13.6	2.2	3.5	0.3	0.9	0	2	51	23	16
C1	35-46	6.5	0.02	1.1	0.08		7.6	2.7	4.7	0.2	1.1	0	3	54	23	14
C3	68-90	6.9	0.12				4.1	2.4	5.4	0.5	3.6	0	2	53	20	18

Profile Described By: J.M. Aldrick, 1978.

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