Location: Yarram West. | Australian Soil Classification: Endoacidic, Self-mulching, Black VERTOSOL. |
Geology: Recent alluvial deposits from Jack River. | General Landscape Description: Undulating elevated plain (1-2% slope). |
Soil Mapping Unit: Riverine. | Site Description: Pasture paddock. |
Site GP40 Landscape |
Soil Profile Morphology:
Surface Soil
A1 | 0-5 cm | Very dark grey (10YR3/1); fine sandy clay; moderate very fine granular structure; very weak consistence dry; organic rich root mat; pH 5.4; smooth change to: | Site GP40 profile |
Subsoil | |||
B21 | 5-20 cm | Dark grey (10YR4/1) with rusty root channel mottling; light medium clay; moderate coarse prismatic, parting to moderate subangular blocky structure; very firm consistence dry; pH 5.5; clear change to: | |
B22 | 20-50 cm | Black (10YR2/1) with faint dark yellowish brown (10YR4/6) mottles; medium clay; strong medium prismatic, parting to strong fine subangular blocky structure; very firm consistence dry; contains very few (<1%) manganese segregations; pH 5.6; gradual change to: | |
B23 | 50-100 cm | Very dark grey (10YR3/1) with faint dark yellowish brown (10YR4/6) mottles; heavy clay; strong coarse prismatic, parting to strong medium sub-angular blocky structure; very firm consistence moist; contains very few (<1%) manganese segregations; pH 5.5: | |
B24 | 100-140 cm | Dark grey (10YR4/1) with strong brown (7.5YR4/6) mottles, as well as mottling down root channels; heavy clay; strong coarse prismatic, parting to strong medium angular blocky structure; firm consistence moist; contains few (<5%) subrounded manganese nodules (5 mm size); pH 5.2. |
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Low | Non-Sodic | None1 |
Deeper subsoil (at 1 m) | Strongly Acid | Low | Non-Sodic | None1 |
Most of the profile is strongly acid. | The exchangeable aluminium levels are low throughout most of the profile but increase in the strongly acid subsoil. |
The salinity rating is low throughout the profile. | The clay content is high throughout the profile. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-5 | 5.4 | 4.9 | 0.26 | <0.03 | 11 | 8.8 | 1.3 | 1.5 |
B21 | 5-20 | 5.5 | 4.7 | 0.17 | 7.8 | 7.7 | 0.51 | 1.5 | |
B22 | 20-50 | 5.6 | 4.9 | 0.28 | 0.05 | 7 | 7.5 | 0.64 | 1.6 |
B23 | 50-100 | 5.5 | 4.8 | 0.29 | 0.04 | 6.8 | 7.7 | 0.54 | 1.6 |
B24 | 100-140 | 5.2 | 4.5 | 0.3 |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Field Capacity pF2.5 | Wilting Point pF4.2 | Coarse Sand (0.2-2.0 mm) | Fine Sand (0.02-0.2 mm) | Silt (0.002-0.02 mm) | Clay (<0.002 mm) |
A1 | 0-5 | <10 | 23 | 36.1 | 3 | 4 | 28 | 42 | |
B21 | 5-20 | 47 | 20 | 27.8 | 0 | 3 | 32 | 52 | |
B22 | 20-50 | 21 | 25 | 28.2 | 0 | 2 | 32 | 55 | |
B23 | 50-100 | 29 | 17 | 25.7 | 0 | 4 | 36 | 52 | |
B24 | 100-140 | 82 |