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| SW53 | Vertic (and Sodic), Calcic Grey CHROMOSOL | |
| Cooriemungle (Boorook Road), Heytesbury district, south-west Victoria | |||
| Rolling hills | |||
| Neogene Gellibrand Marl: marine clays | |||
| Crest | |||
| 2% | |||
| South-west | |||
Horizon | Depth (cm) | Description | ||
A1 | 0–15 | Very dark greyish brown (10YR3/2 moist and 10YR5/3 dry); silty clay loam; weakly pedal structure; medium to fine (2–20 mm) polyhedral structure; pH 5.7; abrupt and smooth boundary to: | ||
B21g | 15–60/70 | Dark greyish brown (2.5Y4/2 moist) common (~15%), yellowish brown (10YR5/8 moist) mottles; medium clay; coarse (20–50 mm) polyhedral, parting to medium to fine (2–20 mm) polyhedral structure; pH 5.7; gradual and wavy boundary to: | ||
B22g | 60/70–105/115 | Light olive grey (2.5Y5/4 moist [50%] and grey 2.5Y5/1 moist [50%]); medium to heavy clay; coarse (50 mm) polyhedral or angular blocky , parting to medium to fine (5–20 mm) polyhedral structure; slickensides (>20 mm); pH 7.4; abrupt and irregular boundary to: | ||
B23kgss | 105/115–160+ | Light olive grey (5Y6/2 moist); common (~20%),yellowish brown (10YR5/8 moist) mottles; heavy clay; very coarse (100–300 mm) angular blocky, parting to coarse (20–50 mm) polyhedral or angular blocky, and medium to fine (2–20 mm) lenticular structure; soft white calcareous accumulations (up to 100 mm) at top of horizon; slickensides (>100 mm); pH 8.9. | ||
Management considerations | ||||
Generally used for dairying, these soils are prone to waterlogging and pugging. Although there is calcium carbonate at depth, surface horizons tend to be acidic and respond well to liming. On the steeper slopes this soil is highly prone to landslides. Subsurface drainage incorporating closely spaced mole drains works well in these soils. |
Site SW53 | Sample depth | pH | EC | NaCl | Ex Ca | Ex Mg | Ex K | Ex Na | Ex Al | Ex acidity | FC (-10kPa) | PWP (-150kPa) | KS | FS | Z | C | |
Horizon | cm | H2O | CaCl2 | dS/m | % | cmolc/kg | cmolc/kg | cmolc/kg | cmolc/kg | mg/kg | cmolc/kg | % | % | % | % | % | % |
A1 | 0-10 | 5.7 | 4.9 | 0.11 | N/R | 8.8 | 3.8 | 0.63 | 0.48 | 13 | 15 | 38.6 | 17.4 | 7.4 | 25.4 | 30 | 27 |
B21 | 15-60 | 5.7 | 4.5 | 0.1 | N/R | 8.5 | 9.4 | 0.51 | 1.2 | 240 | 13 | 44.5 | 24.1 | 0.5 | 17.4 | 19 | 58.5 |
B22 | 70-105 | 7.4 | 6.2 | 0.16 | N/R | 16 | 13 | 0.43 | 3.2 | N/R | N/R | 53 | 26.3 | 0.7 | 12.1 | 17.5 | 65 |
B23 | 105-160 | 8.9 | 8.9 | 0.77 | 0.09 | 16 | 14 | 2.9 | 5.8 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R |
Slip plane features evident in trench below SW53: view downslope (left) profile view (centre), view upslope (right) |