Location: Clyde. | Australain Soil Classification: Ferric-Sodic, Eutrophic, Brown CHROMOSOL. |
Northcote Factual Key: Dy 3.31 | Great Soil Group: soloth/solodic. |
Geology: Tertiary sandstone (some areas may be covered with a veneer of Quaternary aeolian deposits). The rock may be in the order of 10-20 million years old and consists mainly of iron oxide cemented clays and sands (pers. comm. Jim Rowan). | |
General Landscape Description: Gently undulating rises. | Site Description: Grassed verge on the edge of a celery cropping paddock. |
Soil Mapping Unit: Bittern sandy loam. |
Site GP22 Landscape |
A1 | 0-20 cm | Dark brown (10YR3/3); sandy loam; pH 7.0; clear change to: | Site GP22 Profile |
A2 | 20-35 cm | Sporadically bleached; light sandy loam; firm consistence dry; contains many (40%) iron-cemented sandstone and ferruginous nodules (mainly in the 30-35 cm zone); pH 5.8; sharp change to: | |
Subsoil | |||
B21 | 35-80 cm | Yellowish brown (10YR5/4) with bright yellowish brown (10YR5/6) and red (2.5YR4/6) mottles; light medium clay; moderate medium blocky, parting to strong fine sub-angular blocky structure; strong consistence dry; pH 6.4; gradual change to: | |
B22 | 80-120 cm | Light grey (10YR7/1), yellowish brown (10YR5/8) and red (2.5YR4/6) mottles; light medium clay; strong coarse polyhedral structure; strong consistence dry; contains many (30%) iron cemented sandstone; pH 6.2. |
The surface soil is neutral . The rest of the soil profile is slightly acid. | The salinity rating is very low throughout the profile. |
The clay percentage increases sharply at the A/B horizon interface. | The coarse sand content decreases in the clayey B horizons. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 0-20 | 7 | 6.5 | 0.14 | 7.7 | 2 | 0.64 | 0.3 |
A2 | 20-30 | 5.8 | 4.7 | <0.05 | 0.97 | 0.85 | 0.06 | 0.07 |
B21 | 35-80 | 6.4 | 5.5 | 0.07 | 2.6 | 7 | 0.1 | 0.4 |
B22 | 80-120 | 6.2 | 5.7 | 0.1 | 1.1 | 7 | 0.11 | 0.98 |
Horizon | Horizon Depth (cm) | 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) |
A1 | 0-20 | 13 | 6 | 39 | 37 | 5 | 16 |
A2 | 20-30 | 13 | 4 | 28 | 47 | 10 | 13 |
B21 | 35-80 | 34 | 25 | 9 | 15 | 6 | 72 |
B22 | 80-120 | 31 | 21 | 11 | 20 | 6 | 64 |