Site SW41

Location: Elingamite

Australian Soil Classification: Bleached-Vertic (& Ferric), Eutrophic, Brown CHROMOSOL

General Landscape Description: Level plain (between basalt barriers).
Mapping Unit: Unit 2 (Maher and Martin, 1987).
Site Description: Grazing paddock (dairy).
Geology: Quaternary - Newer volcanics (basalt).

Site SW41 Landscape

Soil Profile Morphology:

Surface Soil

A1	0-10 cm	Very dark greyish brown (10YR3/2); very fine sandy clay loam; moderate medium blocky structure; weak consistence moist; pH 5.7; clear change to:	Site SW41 profile
A21	10-20 cm	Yellowish brown (10YR5/8); fine sandy clay loam; contains a few (5%) basalt fragments; pH 5.5; clear change to:
A22	20-40 cm	Brown (10YR5/3), conspicuously bleached; fine sandy clay loam; contains very many (70%) ferruginous nodules (2-10 mm in size); pH 6.0; sharp and wavy change to:
Subsoil
B21	40-60 cm	Yellowish brown (10YR5/4) with a few bright yellowish brown (10YR5/8) mottles; medium clay; strong medium blocky, parting to strong fine polyhedral structure; weak consistence moist; contains very few (5%) ferruginous nodules (2-10 mm in size); pH 6.0; clear change to:
B22	60-80 cm	Greyish brown (10YR5/2) with many yellowish brown (10YR5/8) mottles; medium heavy clay; strong lenticular structure; slickensides present; firm consistence moist; pH 5.9; clear change to:
B23	80-100 cm	Grey (10YR5/1) with common yellowish brown (10YR5/8) mottles; light medium clay; strong lenticular structure; large slickensides present; contains a common (10%) amount of basalt fragments; pH 6.0:
C	100+ cm	Weathered basalt.

Key Profile Features:

• Strong texture contrast between surface (A) horizon and subsoil (B21) horizon.

Key Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Moderately Acid	Very Low	Non-Sodic	None
Subsoil (B21 horizon)	Moderately Acid	Very Low	Non-Sodic	None
Deeper subsoil (at 1 m)	Moderately Acid	Low	Non-Sodic	None

The whole profile is moderately acid throughout.	The profile has a very low to low salinity rating.	The clay content increases sharply at 40 cm depth.

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl2	EC 1:5	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A1	0-10	5.7	5	0.08	6.9	0.9	0.2	0.05
A21	10-20	5.5	4.7	0.06	3	1	0.2	0.05
A22	20-40	6	5.2	0.06	1.3	1.5	0.1	0.05
B21	40-60	6	5.2	0.1	2.8	6.5	0.2	0.8
B22	60-80	5.9	5.3	0.17	3.6	8.5	<0.1	1.7
B23	80-100	6	5.3	0.2	4.8	9.9	<0.1	2.1
C	100+

Horizon	Horizon Depth (cm)	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	0-10	43	17	6	32	28	19
A21	10-20	34	12	5	37	29	21
A22	20-40	27	10	21	32	24	20
B21	40-60	50	31	4	12	9	61
B22	60-80	56	37	2	8	9	69
B23	80-100	50	28	11	28	12	43
C	100+

Profile Described By: Mark Imhof and Austin Brown, August 1998.

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