WCFA7
Location: Litchfield
Australian Soil Classification: Melanic-Sodic, Calcic, Brown DERMOSOL
Northcote Factual Key: Gn2.43
General Landscape Description: Flat Plain.
Site Description: Cultivated cropping paddock, gilgai microrelief.
Geology: Parna – Woorinen Formation.
WCFA7 Landscape
Soil Profile Morphology:
| Surface Soil |  WCFA7 Profile | ||
| A11 | 0-10 cm | Dark reddish brown (5YR3/2); heavy clay loam ; loose (cultivated) surface condition; contains very few fine rounded gravely fragments; pH 7.4; clear and wavy change to: | |
| A12 | 10-25 cm | Dark reddish brown (5YR2.5/2); heavy clay loam; pH 7.9; sharp and wavy change to: | |
| Subsoil | |||
| B21 | 25-55 cm | Dark brown (7.5YR4/3); light medium clay; contains very few medium ferromanganiferous nodules; very highly calcareous; pH 8.3; gradual and smooth change to: | |
| B22 | 55-70 cm | Brown (7.5YR5/4); light medium clay; contains very few ferromanganiferous nodules, few soft calcareous segregations and very few fine calcareous nodules; very highly calcareous; pH 8.8; gradual and smooth change to: | |
| B23 | 70-100 cm | Reddish yellow (7.5YR6/6); contains very few ferro-manganiferous concretions, common coarse soft calcareous segregations, as well as few coarse calcareous nodules; very highly calcareous; pH 9.3. | |
Soil Profile Characteristics:
pH | Salinity Rating | ||
Surface (A1 horizon) | Slightly Alkaline | Low | Non-Sodic |
Subsoil (B21 horizon) | Moderately Alkaline | Low | Non-Sodic |
Deeper Subsoil (at 70-100 cm) | Very Strongly Alkaline | Low - Medium | Strongly Sodic |
| The surface horizon is slightly alkaline. The upper subsoil is moderately alkaline becoming very strongly alkaline in the deeper subsoil. |  | The salinity rating is low to medium throughout the profile.
| | The surface and upper subsoil is non-sodic. The deeper subsoil is strongly sodic. | | |
Chemical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-10 | 7.4 | 7.1 | 0.28 | 0.004 | 19 | 5.5 | 3 | 0.36 |
A2 | 10 - 25 | 7.9 | 7.5 | 0.23 | - | 30 | 5.3 | 1.9 | 0.39 |
B21 | 25 - 55 | 8.3 | 7.8 | 0.26 | 0.007 | 20 | 6.4 | 0.75 | 0.73 |
B22 | 55 -70 | 8.8 | 7.9 | 0.27 | 0.006 | 15 | 7.6 | 0.64 | 1.9 |
B23 | 70 -100+ | 9.3 | 8.2 | 0.44 | 0.029 | 8.3 | 8.9 | 0.7 | 4.3 |
Horizon | Horizon Depth (cm) | Oxidisable Organic Carbon % | Total Nitrogen % | Available Boron mg/kg |
A1 | 0-10 | 1.8 | 0.13 | - |
A2 | 10 - 25 | 1.3 | 0.079 | - |
B21 | 25 - 55 | 0.65 | <0.05 | 1.7 |
B22 | 55 -70 | | | 2.5 |
B23 | 70 -100+ | | | |
Profile Described By: Nathan Robinson, Grant Boyle and John Martin (October 2006).
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