Location: Speed. | Australian Soil Classification: Supracalcic, Mesonatric, Red SODOSOL (very thick sandy surface). |
Geology: Quaternary Woorinen Formation overlying Tertiary Parilla Sandstone. | |
General Landscape Description: Upper slope of a north-south stranded beach ridge. |
Site MP31 and MP32 Landscape |
Ap | 0-22 cm | Brown (7.5YR5/4); sand; loose surface condition and slightly water repellent; structureless (single grain); very weak consistence dry; pH 6.7; sharp and wavy change to: | Site MP31 Profile |
Ap | 22-25 cm | Reddish yellow (7.5YR7/6) discontinuous conspicuous bleach; sand; structureless (single grain); loose consistence dry; sharp and smooth change to: | |
A12 | 25-30 cm | Brown (7.5YR4/4); sand; structureless (single grain); very weak consistence dry; pH 7.1; abrupt and wavy change to: | |
A21 | 30-65 cm | Reddish yellow (7.5YR6/8); sand; structureless (single grain); very weak consistence dry; pH 7.8; abrupt and wavy change to: | |
A22 | 65-70 cm | Reddish yellow (7.5YR6/6); sand; structureless (single grain); loose consistence moist; pH 8.6; sharp and wavy change to: | |
Subsoil | |||
B1 | 70-85 cm | Reddish yellow (5YR5/8); sandy loam; massive; firm consistence dry; pH 9.5; wavy and gradual change to: | |
B21 | 85-105 cm | Reddish yellow (5YR5/8); sandy clay loam (clayey) patches; weakly structured; very firm consistence moist; contains few (2-5%) fine-earth carbonates in patches; pH 9.6; wavy and gradual change to: | |
C | 105+ cm | Sand with very many fine-earth carbonates and hard carbonate nodules in bands. With greater depth the carbonate reduces and the profile becomes a reddish yellow clayey sand; pH 10.1. |
The surface horizon is slightly acid. The rest of the surface soil becomes more alkaline with depth. The subsoil is very strongly alkaline, becoming extremely alkaline at 1m. | The salinity rating is very low for the surface horizons and marginally increases with depth in the subsoil. |
The surface horizons are non-sodic. The subsoil is strongly sodic. | The clay content increases in the subsoil horizons. |