Location: Bass | Property: Hart |
Aust. Soil Class.: Endohypersodic, Epipedal, Black VERTOSOL | |
General Landscape Description: Level plain (0-1% slope) within the Bass River Plain (back swamp). Original vegetation included Melaleuca sp. | |
Geology: Quaternary swamp deposits |
A1 | 0-25 cm | Very dark greyish brown (10YR3/2); medium clay; hardsetting surface condition parting to self mulching; moderate coarse polyhedral, parting to strong fine polyhedral structure; strong consistence dry; pH 5.5; clear to abrupt change to: | GP53 Profile |
Subsoil | |||
B21 | 25-70 cm | Very dark grey (10YR3/1) with brownish yellow (10YR6/8) mottles at depth; heavy clay; moderate coarse prismatic, parting to strong coarse blocky structure; strong consistence dry; pH 6.3; gradual change to: | |
B22 | 70-120 cm | Grey (10YR5/1) with brownish yellow (10YR6/8) and very dark grey (10YR3/1) mottles; medium heavy clay; moderate coarse prismatic, parting to moderate coarse blocky structure; pH 7.2: | |
B23 | 120+ cm | Grey (10YR5/1) with yellow (10YR7/6) mottles; moderate lenticular structure; pH 7.8. |
Key Profile Features:
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Acid | Very Low | Sodic | None1 |
Deeper subsoil (at 1 m) | Slightly Alkaline | Moderate | Sodic | None |
The surface soil is strongly acid. The upper sub-soil is slightly acid becoming slightly alkaline at depth. | The salinity rating in the surface soil is low. The upper subsoil is very low becoming moderate at depth. | The surface soil is non-sodic. The subsoil is sodic. | The clay content increases abruptly at the A/B boundary. |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A1 | 0-25 | 5.5 | 5 | 0.23 | 13 | 5.4 | 0.66 | 0.58 | |
B21 | 25-70 | 6.3 | 5.4 | 0.14 | 11 | 11 | 0.47 | 2 | |
B22 | 70-120 | 7.2 | 6.7 | 0.69 | 0.13 | 11 | 12 | 0.2 | 4 |
B23 | 120+ | 7.8 | 7.3 | 0.95 | 0.17 | 9.6 | 9.8 | 0.2 | 4.5 |
Horizon | Horizon Depth | Ex Al mg/kg | Ex Ac meq/100g | Wilting Point pF4.2 g/100g | Coarse Sand (0.2-2.0mm) % | Fine Sand (0.02-0.2mm) % | Silt (0.002-0.02mm) % | Clay (<0.002mm) % |
A1 | 0-25 | <10 | 15 | 29.8 | 1 | 10 | 37 | 39 |
B21 | 25-70 | <10 | 8.4 | 22.4 | 1 | 5 | 33 | 57 |
B22 | 70-120 | <10 | 5.2 | 23.2 | 1 | 4 | 28 | 64 |
B23 | 120+ | <10 | 3 | 20.1 | 1 | 6 | 33 | 57 |
Management Considerations: