YP3
Location: Telopia Downs
Australian Soil Classification: Eutrophic, Mottled-Subnatric, Yellow SODOSOL (thick sandy surface horizons)
General Landscape Description: Dune field.
Site Description: Wide swale between east-west trending dunes.
Geology: Quaternary aeolian deposits.
Land Use: Cropping, delve plough used.
| YP3 Landscape |
Soil Profile Morphology:
Surface Soil
| A1 | 0-20 cm | Very dark greyish brown (10YR3/2); soft surface condition; loamy sand; slightly water repellent; pH 5.8: |  YP3 Profile |
| A2 | 20-40 cm | Pale brown (10YR6/3) conspicuously bleached (10YR7/2 dry); sand; apedal; pH 5.7: | |
| Subsoil |  | ||
| B21 | 40-60 cm | Brownish yellow (10YR6/6) with many dark red (2.5YR5/6) mottles; light medium clay; strong very course columnar, parting to very coarse prismatic, parting to strong coarse to medium angular blocky structure; firm consistence moist and strong consistence dry; organic stains down the ped faces; pH 6.8: | |
| B22 | 60-80 cm | Brownish yellow (10YR6/6) with very many dark red (2.5YR4/8) mottles; medium clay; strong very coarse to coarse prismatic, parting to moderate coarse blocky structure; firm consistence moist and strong consistence dry; pH 7.2: | |
| B23 | 80-100 cm | Yellowish brown (10YR5/6) with many red (2.5YR5/8) mottles; sandy clay loam; pH 8.0: | |
| B24 | 100-110 cm | Light brownish grey (10YR6/2) with reddish yellow (7.5YR6/8) and yellowish red (5YR5/6) mottles; light medium clay (sandy); strong coarse prismatic structure; pH 8.0: | |
| B25 | 110-130+ | Light grey (10YR7/1) with brownish yellow (10YR6/8) and reddish yellow (7.5YR6/8); sandy loam (clayey); weak very coarse sub-angular blocky structure; strong consistence dry; pH 8.1. | |
Another soil profile close to this dune.
It has very thick sandy surface horizons.
Soil Profile Characteristics:
| - | pH | Salinity | ||
Surface (A1 horizon) | Moderately Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Acid | Very low | Sodic | Slight 1 |
Deeper Subsoil (at 80-100 cm) | Moderately Alkaline | Very low | Strongly Sodic | Strong 1 |
| The surface is moderately acid. The subsoil is slightly acid becoming moderately alkaline with depth. | | The salinity rating is very low throughout. | | The surface is non-sodic. The upper subsoil is sodic becoming strongly sodic with depth. | |
| | | Boron levels are very low throughout the profile. | |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Exchangeable Cations | Organic Carbon % | Total Nitrogen % | Boron mg/kg | 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) | |||
Ca | Mg | K | Na | ||||||||||||||||
meq/100g | |||||||||||||||||||
A1 | 0-20 | 5.8 | 5 | <0.05 | <10 | 3.3 | 2.2 | 0.51 | 0.12 | 0.09 | 1.1 | 0.076 | | 4 | 1.7 | 35 | 57 | 1 | <1.0 |
A2 | 20-40 | 5.7 | 5 | <0.05 | <10 | <1.0 | 0.46 | 0.08 | <0.05 | <0.05 | | | | 4 | 0.5 | 36 | 62 | <1.0 | <1.0 |
B21 | 40-60 | 6.8 | 5.8 | 0.11 | | 6.7 | 9.9 | 5.7 | 0.67 | 1.6 | | | | 29.3 | 17.7 | 20 | 25 | 3 | 49 |
B22 | 60-80 | 7.2 | 5.9 | 0.09 | | | 9.6 | 6.3 | 0.7 | 2 | | | 1 | 29.4 | 18.6 | 20 | 25 | 3 | 50 |
B23 | 80-100 | 8 | 6.6 | 0.08 | | | 4.8 | 3.3 | 0.36 | 1.4 | | | 0.7 | 17.6 | 8.9 | 32 | 43 | 5 | 17 |
B24 | 100-110 | 8 | 6.9 | 0.15 | | | 8.9 | 6.4 | 0.68 | 3 | | | 1 | | | 15 | 30 | 11 | 41 |
B25 | 110-130+ | 8.1 | 6.8 | 0.11 | | | 3.8 | 2.8 | 0.27 | 1.7 | | | 0.7 | | | 26 | 52 | 5.5 | 16 |
Profile Described By: Mark Imhof (October 2008).
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