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| SW61 | Melacic, Humic/Humosesquic, Semiaquic PODOSOL | |
| South of Simpson: Cooriemungle Road and Princetown Road | |||
| Gently undulating plain | |||
| Neogene Hanson Plain Sand Formation | |||
| Level to slightly sloping plain | |||
| <1% | |||
| 0 | |||
Horizon | Depth (cm) | Description | ||
A1 | 0–45 | Black (7.5YR2.5/1 moist, 7.5YR3/1 dry); loamy fine sand; apedal structure; pH 4.2; clear and smooth boundary to: | ||
A2 | 45–65/75 | Grey (10YR5/1 moist); light grey (10YR7/1 dry); loamy medium sand; apedal structure; pH 4.4; abrupt and irregular boundary to: | ||
B21h | 65/75–90 | Black (7.5YR2.5/1 moist and dry); sandy loam; massive structure; pH 4.2; clear and wavy boundary to: | ||
B22hs | 90–100/110 | Very dark brown (10YR2/2 moist); cemented sand (‘coffee rock’); massive; pH 4.5; abrupt and wavy boundary to: | ||
B23s | 100/110+ | 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. | ||
Management considerations | ||||
Extremely acid profile is typical for this type of soil. The bleached A2 horizon is “spewy” and weak when wet and very hard when dry. The B horizon ‘coffee rock’ acts as a barrier to water movement and to root growth. Compare this profile with SW60. |
Site SW61 | 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 | 4.2 | 3.1 | 0.11 | N/R | 0.71 | 1.1 | 0.45 | 0.37 | 42 | 18 | N/R | N/R | 33.5 | 42.8 | 14.5 | 3 |
A2 | 45-70 | 4.4 | 3.6 | <0.05 | N/R | <0.05 | 0.15 | 0.05 | 0.07 | <10 | 1.5 | N/R | N/R | 34.1 | 47.8 | 18.5 | <1 |
B21 | 70-90 | 4.2 | 3.3 | 0.09 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | 29.6 | 44.8 | 17 | 5.5 |
B22 | 90-105 | 4.5 | 4.1 | 0.1 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R |
B23 | 105+ | 4.8 | 4.8 | 0.09 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R |