General Landscape Description: Bottom of a gilgai within an irrigated pasture of a plain. Original vegetation included Black Box (Eucalyptus largiflorens) and Lignum Bush (Muehlenbeckia cunninghamii). | |
Mapped Soil Type: Tragowel Clay. |
LP79 Landscape |
A1 | 0-20 cm | Dark greyish brown (10YR4/2) with rusty root channel mottling; medium heavy clay; crusting surface condition; moderate coarse blocky structure (rough faced peds); firm consistence moist; pH 7.1; abrupt and smooth change to: | Lp79 Profile |
Subsoil | |||
B21 | 20-40 cm | Greyish brown (10YR5/2) with rusty root channel mottling as well as pockets of grey (10YR5/1) without mottling; medium clay; weak coarse blocky structure with compaction fractures; firm consistence moist; contains very few (<2%) magnesium flecks; pH 6.8; clear and wavy change to: | |
B22 | 40-100 cm | Greysih brown (2.5Y5/2); medium clay; moderate fine polyhedral structure with minor slickensides; weak consistence moist; contains patches where there are a few (2-5%) carbonate and silica nodules (2-6 mm in size), some silica is magnesium coated; pH 7.9: | |
B23 | 100+ cm | Greyish brown (2.5Y5/2); medium clay; salt was observed leaching out of the soil; pH 8.2. |
pH | Salinity Rating | |||
Surface (A1 horizon) | slightly alkaline | medium | sodic | none |
Subsoil (B21 horizon) | slightly acid | extreme | sodic | none |
Deeper subsoil (at 1 m) | moderately alkaline | extreme | strongly sodic | none |
The surface is slightly alkaline. The upper subsoil is slightly acid becoming moderately alkaline with depth. | The salinity rating is moderate becoming extremely high at 20 cm. | The surface soil is sodic. The subsoil becomes strongly sodic at 40 cm. |