Australian Soil Classification: Bleached-Vertic, Eutrophic, Yellow CHROMOSOL | General Landscape Description: Gently undulating rises |
Site Description: Very gently inclined 1-2o, western aspect | Geology: Mapped as Tertiary Gellibrand Marl but more likely to be derived from Dilwyn, Eastern View Formation or Hanson Plain Sand |
Soil Profile Morphology:
Ap | 0-20 cm | Dark greyish brown (10YR4/2 moist), greyish brown (10YR5/2 dry); fine sandy loam; apedal to weakly pedal; pH 5.0; clear change to: | SW77 Profile |
A2ec | 20-50 cm | Brown (10YR5/3 moist), conspicuously bleached (10YR7/2 dry); fine sandy loam; gravel (mixed fine quartz and rounded ironstone fragments and buckshot 2-20 mm) making up ~80% of lower 20-25 cm; pH 5.8; abrupt and wavy (amplitude <150 mm) change to: | |
Subsoil | |||
B21t | 50-100 cm | Mottled yellow (10YR7/8 moist) and red (10R4/8 moist) in ped interiors; very dark greyish brown (10YR3/2 moist) on ped faces; medium heavy clay; strong pedal structure, parting to coarse [40-100 mm] prismatic; slickensides (20-100 mm) across peds; material in soil heap very friable after rain and sun; roots to 1 m; pH 6.4; gradual change to: | |
B22tg | 100 cm+ | Matrix becoming yellower and greyer than B21 above; very pale brown (10YR7/3 moist), grey (10YR6/1 moist); red mottles still prominent; medium heavy clay; fine polyhedral structure, pH 6.4. |
pH | Salinity Rating | Sodicity | Dispersion | |
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Acid | Very Low | Non-Sodic | None |
Deeper subsoil (at 100+ cm) | Slightly Acid | Very Low | - | - |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
Ap | 0-10 | 5 | 4.4 | 0.13 | 2.8 | 0.59 | 0.17 | 0.19 | |
A2e | 20-40 | 5.8 | 5 | 0.06 | 1.4 | 0.67 | 0.1 | 0.11 | |
B21t | 60-80 | 6.4 | 5.8 | 0.12 | 3.1 | 9.9 | 0.15 | 1.2 | |
B22tg | 100-120 | 6.4 | 5.6 | 0.16 |
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) |
Ap | 0-10 | 54 | 14 | 26.4 | 7.7 | 14.4 | 48.5 | 20 | 9 |
A2e | 20-40 | <10 | 4.1 | 18.2 | 4.3 | 22.1 | 47.2 | 19 | 9.5 |
B21t | 60-80 | 11 | 41.5 | 29.1 | 3.1 | 10.1 | 3 | 79 | |
B22tg | 100-120 |