MM187
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Site code |
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| Location |
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| Landform |
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| Geology |
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| Element |
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Profile morphology
Horizon | Depth (cm) | Description |
A1 | 0–10 | Dark brown (10YR3/3); fine sandy loam; apedal massive structure; weak consistence (dry); common fine ferruginous concretions; clear boundary to: |
A2 | 10–15 | Yellowish brown (10YR5/4), light grey (10YR7/2 dry) conspicuously bleached; fine sandy clay loam; firm consistence (dry); sharp boundary to: |
B21 | 15–40 | Very dark greyish brown (10YR3/2 moist) with red (5YR4/4) mottles; heavy clay; strong coarse blocky structure; strong consistence (dry); gradual boundary to: |
B22 | 40–50 | Yellowish brown (10YR5/4); medium clay; strong medium blocky structure; very firm consistence (moderately moist); clear boundary to: |
B23 | 50+ | Light yellowish brown (2.5Y6/4); medium clay; moderate fine blocky structure; firm consistence (moderately moist). |
ASC: Eutrophic, Mottled-Hypernatric, Black Sodosol
Analytical data Source: Government of Victoria, State Chemistry Laboratory.
Site MM187 | Sample depth | pH | EC | NaCl | Ex Ca | Ex Mg | Ex K | Ex Na | Ex Al | Ex acidity | |
Horizon | cm | H2O | CaCl2 | dS/m | % | cmolc/kg | cmolc/kg | cmolc/kg | cmolc/kg | mg/kg | cmolc/kg |
A1 | 0–10 | 5.9 | N/R | 0.13 | N/R | 1.9 | 1.9 | 1.2 | 0.3 | 7 | 3.9 |
A2 | 10–15 | 6.3 | N/R | 0.16 | 0.03 | 2 | 2 | 0.6 | 1.1 | 0 | 7.3 |
B21 | 15–40 | 8.3 | N/R | 0.6 | 0.06 | 6.3 | 6.3 | 1.5 | 7.3 | N/R | 0 |
B22 | 40–50 | 8.5 | N/R | 0.61 | 0.1 | 5.6 | 5.6 | 1.5 | 9.4 | N/R | 0 |
B23 | 50+ | 9.3 | N/R | 1.01 | 0.18 | 16.2 | 16.2 | 0.9 | 9.6 | N/R | 0 |
Site MM187 | Sample depth | FC (-10kPa) | PWP (-1500kPa) | KS | FS | Z | C | Org C | Bulk density |
Horizon | cm | % | % | % | % | % | % | % | t m-3 |
A1 | 0–10 | 18.9 | 12.7 | 18 | 46 | 18 | 14 | 4 | 1.23 |
A2 | 10–15 | N/R | N/R | 19 | 42 | 18 | 19 | 1.6 | N/R |
B21 | 15–40 | 54.2 | 36.7 | 7 | 19 | 13 | 57 | N/R | 1.15 |
B22 | 40–50 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R |
B23 | 50+ | N/R | N/R | 4 | 13 | 9 | 41 | N/R | N/R |
Management considerations
These soils have hardsetting topsoils and exhibit a strong texture contrast between the surface soil and the subsoil with a bleached A2 horizon. The bleached A2 horizon is an indication of restricted drainage, poor soil structure (often massive) and low organic matter and nutrients. The fine ferruginous segregations can restrict root penetration and limit available water holding capacity where there are sufficient amounts, often forming a discontinuous or continuous pan where concentrated (>50%). Sodic and mottled subsoils are other key features of this soil and are an indication of periodic waterlogging.
Improvement of soil structure through increased organic matter would be useful while management options include reduced tillage, improving organic matter content and altering the subsoil through artificial drainage (ripping, mole drainage) and/or chemical amelioration.
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