Location: Narracan East. | Australian Soil Classification: Bleached-Acidic, Magnesic, Brown DERMOSOL. |
Great Soil Group: brown podsolic. | Geology: Mid-Tertiary sediments regarded as colluvium from basalts and earlier sediments. |
General Site Description: Simple 2 -3% slope to east - north east. | Mapping Unit: Silver Creek. |
Site Description: Eucalypt plantation. |
Soil Profile Morphology:
A1 | 0-20 cm | Dark greyish brown (10YR4/2); fine sandy clay loam; moderate medium polyhedral structure; weak consistence moderately moist pH 5.1; clear and wavy transition to: | Site CFTT4 Soil Profile |
A2 | 20-40 cm | Light brownish grey (10YR6/2), conspicuously bleached with common, distinct light yellowish brown (10YR6/4) mottles; fine sandy clay loam; weak coarse polyhedral structure; weak consistence dry; pH 5.1; diffuse and smooth transition to: | |
Subsoil | |||
B21 | 40-80 cm | Very pale brown (10YR7/3), with common, medium sized, faint, yellow (10YR7/6) mottles; fine sandy light clay; weak coarse polyhedral structure; weak consistence dry; pH 5.1; clear and wavy transition to: | |
B22 | 80-140 cm | Yellowish brown (10YR5/6), with common, medium, distinct, greyish brown (10YR5/2) mottles; medium clay; weak very coarse polyhedral structure; firm consistence moist pH 5.4; gradual and smooth transition to: | |
B23 | 140-190 cm | Grey (10YR5/1), with many, medium, prominent, yellowish brown (10YR5/6) and strong brown (7.5YR4/6) mottles; medium clay; moderate coarse prismatic, parting to strong medium prismatic structure; very firm consistence moist; slickensides on ped faces. |
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly acid | Very low | Non-sodic | none |
Subsoil (B21 horizon) | Strongly acid | Very low | Non-sodic | none |
Deeper subsoil (at 1 m) | Strongly acid | Very low | Non-sodic | none |
The soil profile is very strongly acid throughout |
The salinity rating is low throughout the entire profile. |
The levels of exchangeable aluminium are reasonably high in the strongly acid surface soil and decrease in the subsoil. |
The clay content increases gradually with depth down the soil profile. |
Horizon | Horizon Depth (cm) | pH water | pH CaCl2 | EC 1:5 | Exchangeable Cations | Ex. Al mg/kg | Ex. Acidity meq/100g | Field Capacity pF 2.5 | Wilting Point pF 4.2 | 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/100 g | ||||||||||||||||
A1 | 0-20 | 5.1 | 4.4 | 0.06 | 2.2 | 1.2 | 0.15 | 1.17 | 110 | 16 | 26 | 7 | 1 | 46 | 35 | 14 |
A2 | 20-40 | 5.1 | 4.4 | <0.05 | 0.37 | 0.56 | <0.05 | 0.1 | 130 | 11 | 30 | 6 | 7 | 40 | 37 | 14 |
B21 | 40-80 | 5.1 | 4.5 | <0.05 | 0.29 | 0.95 | <0.05 | 0.08 | 64 | 6.1 | 25 | 6 | 6 | 40 | 38 | 17 |
B22 | 90-140 | 5.4 | 4.6 | <0.05 | <0.05 | 4.3 | 0.06 | 0.32 | 50 | 7.3 | 32 | 14 | 6 | 28 | 26 | 41 |