GRES490

Location: Swifts Creek

Australian Soil Classification: Humose, Eutrophic, Brown DERMOSOL

Map Unit: Walnut (Component 1)
Previous Site Name: AL22

General Landscape Description: Valley flat
Site description: Level
Land Use: Grazing on annual pasture
Native Vegetation: Dry valley forest. Mostly Yellow Box, some Manna Gum
Geology: Recent alluvium

Soil Profile Morphology:

Surface soil
A0	0 – 7 cm	Loam; moderate crumb structure; abundant roots; abrupt wavy boundary to:
A11	4 – 11 cm	Dark brown (10YR3/3); fine sandy clay loam; apedal; slightly hard dry; abundant roots; abrupt wavy boundary to:
A12	11 – 44 cm	Very dark greyish brown (10YR3/2); fine sandy clay loam; apedal; common roots; clear wavy boundary to:
Subsoil
C1	44 – 87 cm	Dark brown to brown (10YR4/3); sand; apedal; 60 % fine gravel (3 mm); wavy boundary to:
C2	87 – 97 cm	Dark brown to brown (10YR4/3); sand; apedal; 60 % fine gravel (3 mm); wavy boundary to:
C3	97 – 107+ cm	Very dark brown (10YR3/2) with common distinct yellowish brown mottles; silty clay loam; apedal; soft consistence dry.

Key Profile Features:

Little colour or texture changes down the soil profile

Soil Profile Characteristics:

-	pH	Salinity	Sodicity
Surface (AO horizon)	Strongly Acid	Low	Non Sodic
Subsurface (A11 horizon)	Slightly Acid	Very Low	Non Sodic
Deeper subsurface (A12 horizon)	Slightly Alkaline	Very Low	Non Sodic

Chemical and Physical Analysis:

Horizon	Horizon Depth (cm)	pH (water)	EC dS/m	Organic Carbon %	Total Nitrogen %	Free Fe₂O₃ % w/w	Exchangeable Acididty meq/100g	Exchangeable Cations				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
A0	0-7	5.4	0.38	22.0	1.74	0.9	38.8	14.7	4.7	2.1	0.1	0	26	16	17
A11	4-11	6.4	0.12	2.7	0.23	1.5	8.0	9.4	2.4	1.6	0.1	2	53	21	21
A12	11-44	7.3	0.08	1.0	0.10	1.5	4.6	7.8	2.3	1.0	0.1	3	51	21	18
C1	44-87	8.0	0.56			1.4	2.3	3.9	1.0	1.0	0.1	10	69	5	8

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

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