Location: Leongatha South. | Australian Soil Classification: Humose-Acidic, Dermosolic, Redoxic HYDROSOL |
Northcote Factual Key: Gn 4.61 | Geology: Quaternary alluvium which has originated from the South Gippsland Uplands. |
General Landscape Description: Very gently undulating alluvial plain. | Soil Mapping Unit: Powlett. |
Site Description: Roadside verge near corner of Hillgroves Road and Hudson Road at Leongatha South. This site is seasonally saturated for an average of 3-5 months per year. | |
Native Vegetation: Includes Swamp Paperbark (Melaleuca ericifolia), Gippsland Mallee (Eucalyptus kitsoniana), Swamp Gum (E. ovata). |
Site SG1 Landscape |
A11 | 0-20 cm | Black (10YR2/1); very fine sandy loam; firm surface condition; weak very coarse blocky structure; weak consistence dry; pH 5.2; gradual change to: | Site SG1 Profile |
A12 | 20-30 cm | Very dark grey (10YR3/1); very fine sandy loam; firm consistence dry; pH 5.1; gradual change to: | |
A2 | 30-45 cm | Greyish brown (10YR5/2) conspicuously bleached (10YR7/2d); very fine sandy loam; firm consistence dry; contains a few "coffee rock" (soft to semi hard) fragments at 40-45 cm depth; pH 4.9; gradual change to: | |
Subsoil | |||
B21 | 45-70 cm | Light brownish grey (10YR6/2) with brownish yellow (10YR6/6) diffuse mottles; light very fine sandy clay loam; strong consistence dry; moderately structured; pH 4.7; gradual change to: | |
B22 | 70-80 cm | Light brownish grey (10YR6/2) with brownish yellow (10YR6/8) diffuse mottles; silty clay; moderate structure; pH 4.7. |
The soil is strongly acid in the surface horizon and becomes very strongly acid from 30 cm. | Total soluble salt levels are very low throughout the whole profile. | Exchangeable aluminium levels increase with depth down the profile. | No large increase in clay percentage throughout the profile. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | 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) | |||
Ca | Mg | K | Na | ||||||||||||
meq/100g | |||||||||||||||
A11 | 0-20 | 5.2 | 4.1 | 0.06 | 1.5 | 1.2 | 0.3 | 0.1 | 110 | 14 | 7.3 | 1 | 50 | 34 | 8 |
A12 | 20-30 | 5.1 | 3.8 | <0.05 | 0.4 | 0.4 | 0.1 | 0.1 | 180 | 12.8 | 4.7 | ||||
A2 | 30-45 | 4.9 | 4.0 | 0.05 | 0.2 | 0.3 | 0.2 | <0.1 | 210 | 9.2 | |||||
B21 | 45-70 | 4.7 | 4.0 | 0.09 | 0.2 | 0.3 | 0.2 | <0.1 | 280 | 9.8 | 2 | 46 | 31 | 23 | |
B22 | 70-80 | 4.7 | 4.1 | 0.08 | 0.1 | 0.3 | 0.1 | <0.1 | 230 | 4.8 | 2 | 48 | 34 | 19 |