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LP91

Mapsheet: CHARLTONAust. Soil Class.:Vertic (and Calcic), Mesonatric, Red SODOSOL
Northcote Factual Key: Dr 2.13 Great Soil Group: red-brown earth
General Landscape Description: Lower slope on a low rise of a gently undulating plain.


Soil Profile Morphology

Surface Soil
A10-12 cmDark brown (7.5YR3/4); sandy clay loam; moderate coarse blocky structure; firm consistence moist; pH 6.7; abrupt and wavy change to:
Photo: Soil Pit Site lp91 Profile
Lp91 profile
Subsoil
B2112-45 cmYellowish red (5YR4/6); medium heavy clay; medium prismatic, breaking down to strong coarse to medium blocky structure (smooth faced peds); firm consistence moist; pH 8.9; gradual change to:
B22k45-70 cmYellowish red (5YR5/6); medium heavy clay; moderate coarse blocky structure; firm consistence moist; contains a few (2-5%) soft carbonates and occasional nodules; some sand pockets present around ped faces; pH 8.7; gradual change to:
B31k70-100 cmBrown (7.5YR5/4) with Yellowish red (5YR4/6); medium heavy clay; moderate coarse blocky, breaking to strong fine blocky structure; firm consistence moist; contains very few (<2%) very fine gypsum crystals; many pockets of sand present along ped faces; pH 8.6; gradual change to:
B32k100 cm+Light brown (7.5YR6/4) with Yellowish red (5YR5/8) (associated with sand pockets); medium heavy clay; strong coarse blocky, breaking to moderate medium blocky structure; slickensides present; contains numerous fine manganese flecks and pockets of sand between peds; pH 8.7.
Key Profile Features
  • Strong texture contrast between surface (A1) horizon and subsoil (B21) horizon.

Key Profile Characteristics

pH
Salinity Rating
Surface
(A1 horizon)
slightly acid
very low
non-sodic
strong
Subsoil
(B21 horizon)
strongly alkaline
low-medium
strongly sodic
moderate
Deeper subsoil
(at 1 m)
strongly alkaline
high
strongly sodic
-

Photo: Soil Pit Site lp91 graphs

Horizon
Horizon Depth
pH (water)
pH CaCl2
EC 1:5
NaCl
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-12
6.7
5.6
0.09
5.8
37
0.6
0.4
B21
12-45
8.9
8.1
0.63
0.06
13
12
0.9
7.3
B22k
45-70
8.7
8.1
1.11
0.15
9.5
11
1
6.8
B31k
70-100
8.6
8.3
2
0.2
9.8
11
0.8
8.4
B32
100
8.7
8.1
1.12
0.15
7.2
9.3
0.7
7.1

Horizon
Horizon Depth
Ex Al
mg/kg
Ex Ac
meq/100g
Field
pF2.5
Wilting Point
pF4.2
Coarse Sand
(0.2-2.0mm)
Fine Sand
(0.02-0.2mm)
Silt
(0.002-0.02mm)
Clay
(<0.002mm)
A1
0-12
18
8.1
B21
12-45
44.9
24.5
B22k
45-70
46.7
26.8
B31k
70-100
B32
100


Comments from Landholder: Notes:
Profile described by Mark Imhof, Paul Rampant and Karen De Plater (7/7/95)
CC BY 4.0 AU

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