Location: Simpson | Australian Soil Classification: Melacic, Humic/Humosesquic, Semiaquic PODOSOL |
Great Soil Group: podzol | General Landscape Description: Plateau of dissected Tertiary sediments - gently undulating plain |
Site Description: Level to slightly sloping plain | Geology: Hanson Plain Sand |
SW61 Landscape |
Soil Profile Morphology:
A1 | 0-45 cm | Black (7.5YR2.5/1 moist, 7.5YR3/1 dry); loamy fine sand; apedal; pH 4.2; clear and smooth change to: | SW61 Profile |
A2 | 45-65/75 cm | Grey (10YR5/1 moist); light grey (10YR7/1 dry); loamy medium sand; apedal; pH 4.4; abrupt and irregular change to: | |
Subsoil | |||
B21h | 65/75-90 cm | Black (7.5YR2.5/1 moist and dry); sandy loam; massive; pH 4.2; clear and wavy change to: | |
B22hs | 90-100/110 cm | Very dark brown (10YR2/2 moist); cemented sand [“coffee rock”]; massive; pH 4.5; abrupt and wavy change to: | |
B23s | 100/110 cm+ | Mottled yellow (2.5Y7/6 moist), yellowish brown (10YR5/8 moist) and dark red (2.5YR4/8 moist) mottling; cemented sand; massive; pH 4.8. |
pH | Salinity Rating | Sodicity | Dispersion | |
Surface (A1 horizon) | Extremely Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Extremely Acid | Low | Non-Sodic | None |
Deeper subsoil (at 90+ cm) | Very Strongly Acid | 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 | 4.2 | 3.1 | 0.11 | 0.71 | 1.1 | 0.45 | 0.37 | |
A2 | 45-70 | 4.4 | 3.6 | <0.05 | <0.05 | 0.15 | 0.05 | 0.07 | |
B21 | 70-90 | 4.2 | 3.3 | 0.09 | |||||
B22 | 90-105 | 4.5 | 4.1 | 0.1 | |||||
B23 | 105+ | 4.8 | 4.8 | 0.09 |
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 | 42 | 18 | 33.5 | 42.8 | 14.5 | 3 | ||
A2 | 45-70 | <10 | 1.5 | 34.1 | 47.8 | 18.5 | <1 | ||
B21 | 70-90 | 29.6 | 44.8 | 17 | 5.5 | ||||
B22 | 90-105 | ||||||||
B23 | 105+ |