IS25

Location: Haven

Australian Soil Classification: Calcic, Subnatric, Grey SODOSOL

Northcote Factual Key: Ug5.28
Great Soil Group: grey clay
Soil Type: Murtoa Clay.

General Landscape Description: Swale within a Dunefield
Geology: Quaternary Shepparton Formation: fluvial silt, sand and minor gravel

A11	0-10	Dark grey (10YR4/1); light clay; subplastic; cracking and self-mulching surface condition; weak coarse subangular blocky structure; very strong consistence dry; slightly sticky consistence wet; pH 6.6:
A12	10-20	Dark grey (10YR4/1); medium clay; subplastic; cracking and self-mulching condition; weak coarse subangular blocky structure; very strong consistence dry; slightly sticky consistence wet; pH 7.7; sharp boundary to:
Subsoil
B21	20-35	Light brownish grey (2.5Y6/3); light medium clay; subplastic; moderate coarse blocky structure; very strong consistence dry; slightly sticky consistence wet; pH 8.1:
B22	35-90	Pale olive (5Y6/3); medium heavy clay; very plastic; moderate coarse subangular blocky structure; very strong consistence dry; slightly sticky consistence wet; pH 9.1:
B23	90-135	Pale olive (5Y6/3); medium heavy clay; very plastic; strong coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) soft carbonate segregations; pH 9.4:
B24	135-160	Pale olive (5Y6/3); medium heavy clay; very plastic; strong coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 9.1; gradual boundary to:
B31	160-200	Pale yellow (5Y7/4); heavy clay; very plastic; strong coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 8.9:
B32	200-220	Pale yellow (5Y7/4); heavy clay; very plastic; strong coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 7.7.

Horizon	Sample Depth cm	pH H2O	EC dS/m	Sodium Chloride %	Exchangeable Calcium cmol-/kg	Exchangeable Magnesium cmol-/kg	Exchangeable Potassium cmol-/kg	Exchangeable Sodium cmol-/kg	Total Nitrogen %	Exchangeable Acidity cmol-/kg	Organic Carbon %	Permanent Wilting Point -1500okPa	Coarse Sand %	Fine Sand %	Silt %	Clay %
A11	0–10	6.6	0.17	0.02	8.6	4.7	2.1	0.2	0.16	5	1.8	13.5	16	39	10	34
A12	10–20	7.7	0.12	0.01	8.9	6.3	1.5	0.5	0.06	3.7	0.67	15.1	15	36	11	39
B21	20–35	8.1	0.14	0.02	7.1	6.6	1	1.9	0.04	3.1	0.42	15.3	14	39	11	35
B22	35–90	9.1	0.33	0.04	5.5	9	1.4	5	0.02		0.19	20.6	13	33	12	42
B23	90–135	9.4	0.94	0.12	5.4	10.6	1.4	8.8	0.01		0.12	20.3	11	23	11	47
B24	135–160	9.1	1.11	0.25								19.2	15	26	10	47
B31	160–200	8.9	1.21	0.2								19.7	11	28	11	47
B32	200–220	7.7	1.28	0.21								20.6	12	27	9	50

• Gradational profile, medium to heavy texture range with vertic properties.
• Neutral upper soil over alkaline and sodic subsoil. Slight decrease at depth.
• Upper soil (A horizons) indicate some organic matter content.
• Sodicity increases below upper subsoil (below 35 cm).
• Subsoil has yellow hue (5Y) and pale colours indicating reducing conditions, limited drainage and air movement.
• Landscape element, swale; very slow site drainage.