Location: Cora Lyn | Aust. Soil Class: Humose-Acidic (and Vertic), Eutrophic, Grey DERMOSOL |
Northcote Factual Key: Gn 3.41 | Great Soil Group: humic gley |
General Site Description: Pasture paddock which has previously been cropped. | Mapping Unit: Koo-Wee-Rup peaty clay |
Landscape Description: Lacustrine plain | Geology: Recent swamp deposits. |
Site GP26 Landscape |
A1 | 0-22 cm | Dark brown (7.5YR3/2) fine sandy clay loam (organic); hardsetting surface condition; rusty root channel mottling present; moderate coarse blocky, parting to moderate fine blocky and granular structure; weak to firm consistence moist; pH 5.6; sharp change to: | Site GP26 Profile |
Subsoil: | |||
B21 | 22-40 cm | Very dark grey (10YR3/1); light medium clay; moderate coarse blocky, parting to moderate medium blocky structure; very firm consistence moist; contains a common (15%) amount of quartz fragments (2-6 mm in size); pH 5.5; clear change to: | |
B22 | 40-65 cm | Dark greyish brown (10YR4/2) with yellowish brown (10YR5/8) mottles (associated with root channels); medium clay (gritty); contains a common (20%) amount of quartz fragments (2-4 mm in size); pH 5.3; gradual and wavy change to: | |
B23 | 65-100 cm | Light brownish grey (10YR6/2) with strong brown (7.5YR4/6) mottles (associated with root channels); heavy clay (gritty); parts to strong fine lenticular structure (shiny-faced peds); contains many (15%) quartz and feldspar fragments; pH 4.9; gradual change to: | |
B24 | 100+ cm | Grey (10YR5/1) with strong brown (7.5YR5/8) mottles (associated with root channels; medium heavy clay; strong medium lenticular, parting to strong fine lenticular structure (shiny-faced peds); contains a few (5%) quartz and feldspar fragments; pH 4.6. |
Key Profile Features:
The surface is moderately acid. The subsoil is strongly acid; becoming very strongly acid at 120 cm. | The salinity rating is low for the upper soil profile, and becomes low-medium in the deeper subsoil. |
Clay content increases gradually with depth down the soil profile | There is a moderate level of exchangeable aluminium in the upper soil profile. The level of exchangeable aluminium increases in the very strongly acid deeper subsoil. |
Horizon | Horizon Depth | pH water | pH CaCL2 | EC 1:5 | NaCI % | Exchangeable Cations | ExAl mg/kg | Ex Ac meg/100g | Field pF 2.5 | Wilting Point pF 4.2 | Coarse Sand (0.02 -0.2mm) | Fine Sand (0.02 -0.2mm) | Silt (0.02 -0.2mm) | Clay (<0.002mm) | |||
ca | mg | k | Na | ||||||||||||||
meg/100g | |||||||||||||||||
A11 | 0-22 | 5.6 | 4.9 | 0.11 | 0.04 | 5.0 | 1.4 | 0.81 | 0.37 | 79 | 32 | 64.2 | 25.5 | 10 | 16 | 21 | 28 |
B21 | 22-40 | 5.5 | 4.6 | 0.09 | 0.03 | 3.5 | 2.4 | 0.21 | 0.49 | 75 | 13 | 35.9 | 14.7 | 18 | 22 | 19 | 33 |
B22 | 40-65 | 5.3 | 4.4 | 0.13 | 0.04 | 2.0 | 2.8 | 0.16 | 0.61 | 48 | 6.1 | 23.6 | 10.9 | 26 | 26 | 17 | 30 |
B23 | 65-100 | 4.9 | 4.3 | 0.28 | 0.09 | 2.4 | 5.1 | 0.27 | 1.3 | 100 | 7.9 | 32.2 | 16.9 | 18 | 18 | 13 | 49 |
B24 | 100+ | 4.6 | 4.1 | 0.41 | 0.13 | 1.8 | 5.7 | 0.37 | 2.0 | 130 | 8.5 | 32.8 | 18.2 | 18 | 18 | 14 | 48 |