NE46ii
| Location: Chiltern Valley |
NE46ii Landscape
Soil Profile Morphology:
Surface Soil
| A1 | 0-8 cm | Very dark brown (10YR2/2); sandy loam; weak – moderate to medium blocky; very weak consistence (dry); few quartz fragments; pH 4.3; abrupt change to: |  NE46ii Profile |
| A2 | 8-20 cm | Yellowish brown (10YR5/6) conspicuously bleached (10YR7/4 dry); heavy sandy loam; single grained structure; firm consistence (dry); quartz fragments common (20%); pH 4.5; clear change to: | |
| Subsoil | |||
| B1 | 20-35 cm | Brownish yellow (10YR6/6); fine sandy clay loam+; weak coarse blocky structure; weak consistence (dry); few (10%) quartz fragments; macropores present; pH 4.5; gradual change to: | |
| B2 | 35-60 cm | Brownish yellow (10YR6/8); light clay (gritty); weak medium polyhedral, parting to moderate fine polyhedral structure; weak consistence (dry); few (5%) quartz fragments; macropores present; pH 4.6; clear change to: | |
| B31 | 60-90 cm | Brownish yellow (10YR6/8) with many (30%) red (2.5YR5/8) mottles; sandy clay; moderate medium – fine polyhedral structure; very weak consistence (slightly moist); few (10%) quartz fragments; pH 4.9; gradual change to: | |
| B32 | 90-110 cm | Light grey (10YR7/1) with red (2.5YR5/8) and brown yellow (10YR6/8) mottles; sandy clay; (texture varies with grey areas having a greater clay content compared to yellow and red areas with higher sand content); strong fine polyhedral structure; weak consistence (dry); few (10%) quartz fragments; pH 4.9. | |
Key Profile Features:
Soil Profile Characteristics:
Horizon | pH | Salinity Rating | ||
Surface (A1 horizon) | Extremely Acid | Very Low | Non-Sodic | None |
Subsoil (B2 horizon) | Very Strongly Acid | Very Low | Non-Sodic | None |
Deeper subsoil (at 90-110 cm) | Very Strongly Acid | Very Low | Non-Sodic | None |
Soil Profile Characteristics:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 0-8 | 4.3 | 3.8 | 0.12 | 2.4 | 0.74 | 0.53 | 0.11 |
A2 | 8-20 | 4.5 | 4.1 | 0.05 | 0.30 | 0.12 | 0.13 | 0.06 |
B1 | 20-35 | 4.5 | 4.1 | 0.06 | 0.39 | 0.19 | 0.17 | <0.05 |
B2 | 35-60 | 4.6 | 4.1 | 0.06 | 0.94 | 0.64 | 0.19 | 0.07 |
B31 | 60-90 | 4.9 | 4.4 | 0.05 | 0.26 | 4.4 | 0.45 | 0.08 |
B32 | 90-110 | 4.9 | 4.3 | <0.05 | 0.11 | 5.3 | 0.44 | 0.14 |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Field Capacity pF 2.5 | Wilting Point pF 4.2 | 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 | 0-8 | 86 | 18 | 31.5 | 11.4 | 37 | 31 | 14 | 6 |
A2 | 8-20 | 100 | 4.9 | 16.2 | 3.3 | 40 | 34 | 9 | 9 |
B1 | 20-35 | 170 | 5.7 | 20.2 | 6.5 | 30 | 32 | 1 | 34 |
B2 | 35-60 | 160 | 7.3 | 20.8 | 9.3 | 28 | 26 | 4 | 37 |
B31 | 60-90 | 130 | 10 | 29.4 | 18.4 | 18 | 16 | 8 | 57 |
B32 | 90-110 | 190 |  | | | 20 | 15 | 9 | 56 |
Mark Imhof (May 2003)
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