Australian Soil Classification: Bleached-Vertic (& Mottled), Magnesic, Brown CHROMOSOL | General Landscape Description: Undulating low hills |
Site Description: Waxing upper slope | Geology: Otway Group, (volcanogenic sandstone) |
SW71 Landscape |
Soil Profile Morphology:
A1 | 0-20 cm | Dark grey (10YR4/1 moist), greyish brown (10YR5/2 dry), fine sandy loam; moderately pedal; weak to firm consistence; pH 5.5: | SW71 Profile |
A2e | 20-50/60 cm | Light brownish grey (2.5Y6/2 moist), conspicuously bleached (2.5Y8/1 dry); fine sandy loam; hard setting; common (<20%), fine ferromanganiferous gravel (mostly not magnetic) sporadic and not in thick layer; very firm consistence; clear to gradual change (incipent B1) to; pH 5.8: | |
Subsoil | |||
B21ss | 50/60-100/120 cm | Dark yellowish brown (10YR3/4 moist and dry); many (~25%), faint, fine to coarse (5-20 mm) yellow brown/ dark red mottles; heavy clay; coarse (50-120 mm) prismatic, parting to thick lenticular or angular blocky structure; slickensides; diffuse yellower change to; pH 6.0: | |
C/B | 120 cm+ | Brownish yellow (10YR6/8 moist) to yellow (10YR8/8 dry); fine sandy with white (10YR8/1 moist) and very dark grey (5YR3/1 moist) ped faces; below 150 cm, extremely hard to break with geopick; cemented ferruginised sandstone. |
pH | Salinity Rating | Sodicity | Dispersion | |
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | 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 | 5.5 | 4.7 | 0.12 | 3.2 | 2.1 | 0.23 | 0.35 | |
A2 | 30-50 | 5.8 | 4.7 | <0.05 | 0.67 | 0.96 | <0.05 | 0.17 | |
B21 | 65-85 | 6 | 4.9 | 0.1 | 1.2 | 12 | 0.15 | 1.4 |
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 | 23 | 14 | 33.5 | 11.4 | 9.5 | 38 | 26.5 | 18 |
A2 | 30-50 | 23 | 6.2 | 19.1 | 6.8 | 7.8 | 44.5 | 24 | 23.5 |
B21 | 65-85 | 19 | 13 | 43 | 27 | 1.4 | 11.4 | 7 | 79.5 |