MP34
| Location: Nullawil. | Australian Soil Classification: Endocalcareous-Endohypersodic, Epipedal, Brown VERTOSOL. |
| Geology: Recent alluvial deposits (Coonambidgal Formation). |  |
| General Landscape Description: Alluvial plain - original vegetation included Black Box (E. largiflorens) and Lignum Bush (Muhlenbeckia spp.). Gilgai microrelief present. | |
| Site Description: Reserved area with some native vegetation. | |
 MP34 Landscape. |
Soil Profile Morphology:
Surface Soil
| A1 | 0-10 cm | Brown (7.5YR4/4); light clay (fine sandy); surface cracking when dry; moderate coarse subangular blocky, parting to medium subangular blocky structure; rough fabric; weak consistence moist and very friable; pH 8.1; clear change to: |  MP34 Profile |
| Subsoil | |||
| B21 | 10-20 cm | Brown (10YR4/3); medium clay; moderate medium sub-angular blocky, parting to fine sub-angular blocky structure; very weak consistence moist and friable; moderately calcareous; pH 8.6; wavy change to: | |
| B22 | 20-45 cm | Brown (10YR4/3); light medium clay; strong medium sub-angular blocky structure; smooth fabric; very weak consistence moist and very friable; slightly calcareous; pH 9.0; gradual change to: | |
| B23 | 45-90 cm | Strong brown (7.5YR5/6); light medium clay; strong very coarse prismatic, parting to strong coarse angular blocky structure; strong consistence dry; contains very few (2%) hard carbonate/silica nodules (size 6-8 mm) and few (2-5%) fine-earth carbonates; highly calcareous; pH 9.4: | |
| B24 | 90+ cm | Strong brown (7.5YR5/6); heavy clay; strong fine lenticular structure; smooth fabric; slickensides present; also contains carbonate/silica nodules (size 6-8 mm); pH 9.4. | |
NOTE: Sand along cracks throughout the profile.
Key Profile Features:
- Surface cracking in summer.
- Vertic properties i.e. slickensides and lenticular peds.
Soil Profile Characteristics:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCI % | Exchangeable Cations | Field Capacity pF 2.5 | Coarse Sand (0.2 - 2.0 mm) | Fine Sand (0.02 -0.2 mm) | Silt (0.002 -0.02 mm) | Clay (<0.002 mm) | |||
Ca | Mg | K | Na | |||||||||||
meq/100g | ||||||||||||||
A1 | 0-10 | 8.1 | 7.4 | 0.13 | | 12 | 4.1 | 2.2 | 0.4 | 12 | 15 | 41 | 7 | 37 |
B21 | 10-20 | 8.6 | 7.9 | 0.17 | | 19 | 7.7 | 2.6 | 0.9 | 18 | 13 | 25 | 8 | 56 |
B22 | 20-45 | 9 | 8.2 | 0.2 | | 14 | 12 | 1.8 | 1.9 | 20 | 10 | 21 | 7 | 60 |
B23 | 45-90 | 9.4 | 8.7 | 0.62 | 0.07 | 4.8 | 15 | 1.3 | 5.9 | 21 | 8 | 23 | 9 | 57 |
B24 | 90+ | 9.4 | 8.9 | 1 | 0.16 | 3.7 | 15 | 1.4 | 8.5 | | | | | |
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The surface soil is moderately alkaline. The upper subsoil is strongly alkaline and the deeper subsoil becomes very strongly alkaline. | The salinity rating is low for the upper part of the soil profile but becomes medium at 45 cm depth and high at 90 cm depth. |
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The surface soil and upper subsoil is non-sodic. The deeper subsoil (from 45 cm depth) is strongly sodic. | The soil profile is clayey throughout. |
Landholder Comments: Never been cultivated, floods occasionally.
Profile Described By: Mark Imhof and Nathalie Baxter (August, 1996).
© State of Victoria (Agriculture Victoria) 1996 - .
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