ESAS5
Location: Rupanyup
Australian Soil Classification: Epicalcareous-Endohypersodic, Self-Mulching, Grey VERTOSOL
General Landscape Description: Level plain.
Site Description: Cropping paddock.
Geology: Quaternary alluvial and aeolian deposition.
 ESAS5 Landscape |
Soil Profile Morphology:
Surface Soil
| Ap | 0-5 cm | Grey (10YR5/1); light clay; self-mulching and surface cracking ; pH 7.9: |
 ESAS5 Profile |
| Subsoil | |||
| B21 | 5-30 cm | Grey (2.5Y5/1); medium clay; moderate very coarse (>50 mm) blocky (probably compacted) structure; strong consistence dry; pH 8.4; gradual change to: | |
| B22 | 30-70 cm | Grey (2.5Y5/1); heavy clay; strong coarse to medium (10-50 mm) sub-angular blocky, parting to moderate to strong coarse to medium (10-50 mm) lenticular structure; strong consistence dry; very few (1%) soft (2-5 mm) calcareous nodules; pH 8.8; wavy and gradual change to: | |
| B23 | 70-110 cm | Grey (2.5Y5/1); heavy clay; strong consistence dry; very few (1-3%) calcareous nodules; pH 9.0; diffuse change to: | |
| B31k | 110-150 cm | Pale brown (10YR6/3); heavy clay; strong very coarse to coarse (50 - >100 mm) prismatic, parting to strong coarse (20-50 mm) strong sub-angular blocky structure; few (5-10%) slightly soft and some semi-hard calcareous nodules; pH 9.2; diffuse change to: | |
| B32k | 150 +cm | Light grey (2.5Y7/2); medium heavy clay; pH 9.2. | |
Soil Profile Characteristics:
| - | pH | Salinity | ||
Surface (Ap horizon) | Slightly Alkaline | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Moderately Alkaline | Very Low | Non-Sodic | None |
Deeper Subsoil (at 1.5 metres) | Very Strongly Alkaline | Medium-High | Strongly Sodic | Strong |
| The surface soil is slightly alkaline. The subsoil is moderately alkaline becoming very strongly alkaline with depth. |  | The salinity rating is very low in the surface and upper subsoil becoming high with depth. | | The surface is non-sodic. The upper subsoil is non-sodic becoming strongly sodic (and dispersive) with depth. | | The clay content is high throughout the profile | | Boron levels are quite high below one metres depth. |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
Ap | 0-5 | 7.9 | 7.4 | 0.18 | 29 | 7.7 | 2.8 | 0.22 |
B21 | 5-30 | 8.4 | 7.8 | 0.23 | 35 | 12 | 1.7 | 1.7 |
B22 | 30-70 | 8.8 | 8.1 | 0.35 | 22 | 17 | 1.8 | 5.2 |
B23 | 70-110 | 9 | 8.2 | 0.49 | 19 | 19 | 2 | 8.2 |
B31K | 110-150 | 9.2 | 8.6 | 1 | 11 | 19 | 1.8 | 11 |
B32 | 150+ | 9.2 | 8.6 | 1.0 | 9 | 19 | 1.7 | 12 |
Horizon | Horizon Depth (cm) | Oxidisable Organic Carbon % | Total Nitrogen % | Boron mg/kg | 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) |
Ap | 0-5 | 1.4 | 0.11 | 2.0 | 42.1 | 21.8 | 12 | 17 | 17 | 46 |
B21 | 5-30 | 0.59 | <0.05 | 2.6 | 52 | 28.8 | 9 | 14 | 10 | 62 |
B22 | 30-70 | | | 4.6 | 54.1 | 29.1 | 8 | 12 | 7 | 68 |
B23 | 70-110 | | | 6.6 | | | | | | |
B31K | 110-150 | | | 15 | | | | | | |
B32 | 150+ | | | 4.5 | | | | | | |
ESAS5 Trial site.
Profile Described By: Mark Imhof (October 2006).
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