Location: Simpson.
Australian Soil Classification: Humose, Sesquic, Semiaquic PODOSOL (thick sandy surface/clay loamy subsoil).
General Landscape Description: Gently undulating plain.
Site Description: Flat Plain.
Geology: Hanson Plain Sand.
Land Use: Dairy cattle grazing.
SW63 Landscape |
Ah | 0-50 cm | Black (10YR2/1); loamy sand; apedal; weak consistence dry; many whitish sand grains; pH 5.1; abrupt and wavy change to: NOTE: horizon becomes paler to dark grey (10YR4/1) at about 15 cm but the difference is not marked enough to be described as an A2. | SW63 Profile. |
Subsoil | |||
B21sm | 50-52 cm | Dark brown (10YR3/3) to dark yellowish brown (10YR3/4); loam; weakly cemented thin pan; firm consistence dry; clear change to: | |
B22sg | 52-80/90 cm+ | Light olive brown (2.5Y5/3) with olive yellow (2.5Y6/6) mottles; loam; massive; firm consistence dry; pH 4.6; diffuse change to: | |
B23g | 80/90+ cm | Light yellowish brown (2.5Y6/3) with slight yellowish brown (10YR5/8) mottles; loam; apedal; pH 4.6. | |
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Very Strongly Acid | Low | Non-Sodic | None |
Deeper subsoil (85+ cm) | Very Strongly Acid | Low | Non-Sodic | None |
The surface is strongly acid. The subsoil is very strongly acid. | Salinity rating is low throughout the profile. | Exchangeable Aluminium levels are high throughout the profile. | Clay levels jump markedly at the surface / subsoil boundary. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC (dS/m) | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A | 0-50 | 5.1 | 3.9 | 0.12 | 2.8 | 0.52 | 0.55 | 0.31 |
B22sg | 50-85 | 4.6 | 4.4 | 0.1 | 0.09 | 0.1 | <0.05 | 0.23 |
B23g | 85+ | 4.6 | 4.2 | 0.07 | <0.05 | 0.17 | <0.05 | 0.16 |
Horizon | Horizon Depth (cm) | Oxidisable Organic Carbon % | Total Nitrogen % | 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) |
A | 0-50 | 6.8 | 0.34 | 59 | 19 | 23 | 11 | 26 | 43 | 15 | 3 |
B22sg | 50-85 | 160 | 11 | 18 | 8 | 17 | 47 | 16 | 17 | ||
B23g | 85+ | 170 | 4.9 | 14 | 5 | 18 | 48 | 19 | 16 |