Australian Soil Classification: Humose, Sesquic, Semiaquic PODOSOL | General Landscape Description: Undulating low hills |
Site Description:Waxing upper slope | Geology: Ambiguous: Hanson Plain Sand, Dilwyn Formation (Colac 1:250 000), or Eastern View Formation (Colac 1:50 000) |
SW70 Landscape |
Soil Profile Morphology:
Ap | 0-20/25 cm | Very dark greyish brown (10YR3/2 moist), greyish brown (10YR5/2 dry); loamy sand; apedal; pH 5.3; diffuse change to: | SW70 Profile |
A2 | 30-90/110 cm | Greyish brown (10YR5/2 moist), conspicuously bleached (10YR7/2 dry); sand; sporadic gravel band (>100 mm); with dark very medium to coarse (5-15 mm) nodules with manganiferous centres; very weak to weak consistence; pH 5.4; abrupt change to: | |
Subsoil | |||
B21s | 90/110-150 cm | Brown (7.5YR4/4 moist and dry) and brownish yellow (10YR6/8 moist) to yellow (10YR7/8 dry); sandy clay loam; cemented sand, ("coffee rock"); massive; firm to strong consistence; clear change to: | |
B22g | 150-200 cm | Yellowish brown (10YR5/8 moist) (50%) and light greenish grey (5GY7/1 moist) (50%); very dark greyish brown (10YR3/2 moist) coatings; sandy light clay; pH 6; clear change to: | |
B23 | 200 cm+ | Mottled yellowish brown (10YR5/8 moist) (30%) and light greenish grey (5GY7/1 moist) (70%); apedal. |
pH | Salinity Rating | Sodicity | Dispersion | |
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Moderately Acid | Very Low | Non-Sodic | None |
Deeper Subsoil (85 cm) | Moderately Acid | Very Low | Non-Sodic | None |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-10 | 5.3 | 4.6 | 0.25 | 2 | 1.1 | 0.44 | 0.72 | |
A2 | 30-50 | 5.4 | 4.6 | 0.07 | 0.27 | 0.13 | <0.05 | 0.18 | |
BS | 65-85 | 5.8 | 4.9 | 0.08 | 1.3 | 1.9 | 0.09 | 0.33 |
Horizon | Horizon Depth (cm) | Ex Al mg/kg | Ex Ac meq/100g | Field 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 | 15 | 9.9 | 15.1 | 6.8 | 48.9 | 32.3 | 9 | 5 |
A2 | 30-50 | 11 | 2.1 | 8.2 | 1.2 | 47.8 | 38.3 | 8 | 4.5 |
BS | 65-85 | <10 | 4.1 | 12 | 6 | 45.8 | 31.8 | 3.5 | 17.5 |