SFS14

Location: Mt Pollock.

Australian Soil Classification: Ferric (& Calcic), Mottled-Mesonatric, Grey SODOSOL

General Landscape Description: Plain.
Site Description: Southern Farming Systems (SFS) 'Concept Farm' - surface run-off/deep drainage pasture plot.
Geology: Quaternary - Newer Volcanics

SFS14 Landscape.

Soil Profile Morphology:

Surface Soil
A1	0-15 cm	Very dark greyish brown (10YR3/2); fine sandy clay loam; weakly pedal; common amount of ferruginous buckshot; many fine roots; pH 5.2; abrupt and wavy change to:
Subsoil
B21	15-55 cm	Very dark brown (10YR3/2) with yellowish brown (10YR5/6) mottles; gravelly medium clay; very coarse prismatic, parting to medium polyhedral structure; common fine (<2 mm in size) ferruginous buckshot; pH 7.7:
B22k	55+ cm	Brown (10YR5/3); medium clay; few fine (<2mm in size) ferruginous buckshot as well as soft calcareous segregations; contains basalt cobbles (up to 200 mm in size); pH 9.1.

Key Profile Features:

Soil Profile Characteristics:

The pH in the surface is strongly acid. The pH in the subsoil is slightly alkaline becoming very strongly alkaline with depth.

The salinity rating is low in both the surface and upper subsoil. The salinity rating increases to medium in the deeper subsoil.

The surface is non sodic. The subsoil is strongly sodic.

The clay content increases sharply at the surface / subsoil interface.

Horizon	Horizon Depth (cm)	Exchangeable Aluminium mg/kg	Exchangeable Acidity meq/100g	Oxidisable Organic Carbon %	Total Nitrogen %	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	0-15	<10	11	3.6	0.31	28.2	12.7	10	47	15	21
B21	15-55					36.4	19.6	14	31	11	42
B22k	55+					41.5	20.4	11	25	10	44

Management Considerations:

Whole Profile

Plant available water capacity (PAWC) is considered to be medium (estimated at 107 mm) in the upper 100 cm of this soil profile.

Profile Described By: Tim Johnston (April 2000).

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