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PVI9

Location: PVI Hamilton

Australian Soil Classification: Bleached-Vertic (&Ferric-Sodic), Eutrophic, Brown CHROMOSOL (thick, clay loamy surface)
Northcote Factual Key: Dy 3.42
Great Soil Group: Possibly brown podzolic

Geology: Tertiary/Quaternary basalt.
General Landscape Description: Valley flat beneath rises.
Soil Mapping Unit: Monivae clay loam.

Site Description: Grazing paddock.

Photo: Soil Pit PVI 9 Landscape
PVI9 Landscape


Soil Profile Morphology:

Surface Soil

A10-15 cmDark brown (10YR3/3); very fine sandy clay loam; weak coarse blocky structure; very firm consistence (dry); pH 5.3; clear change to:

Photo: Soil Pit PVI 9 Profile
PVI9 Profile
A215-40 cmBrown (10YR5/3); conspicuously bleached (10YR7/1 dry); light fine sandy clay loam; massive structure; very firm consistence (dry); pH 5.9; abrupt change to:

Subsoil

B140-50 cmBrown (10YR5/3); light medium clay; weakly structured; very strong consistence (dry); pH 6.6; clear change to:

B2150-65 cmBrown (10YR5/3) with brownish yellow (10YR6/6 and 6/8) mottles; medium clay; very strong consistence (dry); many (30%) ferruginous nodules (2-4 mm); pH 6.6; gradual change to:

B2265-100 cmYellowish brown (10YR5/4) with brownish yellow (10YR6/6 and 6/8) mottles; medium heavy clay; moderate coarse blocky, parting to lenticular structure; very strong consistence (moist); many (20-40%) ferruginous nodules (2-6 mm); some manganese stains; pH 6.7:

B23100+ cmLight brownish grey (10YR6/2) with many (40%) brownish yellow (10YR6/8) and dark red (2.5YR4/8) mottles; weak coarse prismatic, parting to moderate lenticular structure; rigid consistence (moist); contains few (5%) ferruginous nodules (2-6 mm); pH 6.7.

Key Profile Features:
Soil Profile Characteristics:


pH
Salinity Rating
Surface Soil
(A1 horizon)
Strongly Acid
Low
-
None
Upper Subsoil
(40 - 50 cm)
Slightly Acid
Low
Non-Sodic
None
Deep Subsoil
(at 100+ cm)
Slightly Acid
Low
Sodic
None

Graph: pH in PVI 9
Graph: Salinity in PVI 9
Graph: Sodicity in PVI 9
Graph: Clay in PVI 9

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC 1:5
NaCl2
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-15
5.3
4.8
0.10
4.8
1.5
0.12
0.18
A2
15-40
5.9
5.2
<0.05
2.7
0.77
<0.05
0.08
B21
50-65
6.6
5.7
0.06
<0.01
3.6
4.2
0.12
0.45
B22
65-100
6.6
6.0
0.13
4.9
7.7
0.22
1.3
B23
100+
6.7
6.0
0.12
4.4
7.7
0.17
1.7


Horizon
Horizon Depth
(cm)
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)
A1
0-15
10

38
9
3
40
31
18
A2
15-40
<10

24
4
3
50
32
11
B21
50-65
6.7
27
13
7
38
23
34
B22
65-100
8.9
35
21
12
19
15
50
B23
100+

Profile Described By: Mark Imhof, Paul Rampant (January 2001).
CC BY 4.0 AU

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The content is provided under the Creative Commons Attribution 4.0 Australia licence (CC BY 4.0 AU).

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