Download Agency Code: 501 Project Code: P Site Code: 0374

Agency Code: 501 Project Code: P Site Code: 0374
Described by: Eric Bettenay Date: 10/06/1958
Observation type: soil pit Category:
Lab Analyses: Detailed chemical and physical analyses.
Location: MGA94 Zone: 50 617296 mE 6514147 mN Elevation (m): 305 Map
sheet: Bruce Rock 100K
Location notes: Merredin Agricultural Station - near easr end of Donga Creek:
Site notes:
Disturbance: Complete clearing; past cultivation.
Landform
Landform pattern: plateau
Relief/modal slope:
Landform element: pediment
Morphological type: flat
Pattern Relief: plateau
Surface and Hydrological Properties
Rock outcrop:
Surface coarse fragments:
Physical properties:
Geology/parent material
Soil parent material: unconsolidated material (unidentified)
Land use
Surrounds: Cropping (may include grazing in rotation).
Current Classification
WA Soil Group: (1999) Yellow/brown shallow loamy duplex
Australian Soil Classification: (2002) Mottled Eutrophic Red Chromosol
ASC confidence: high
Map Unit: 258KbME
Other Classifications
Great Soil Group: Solodic soil
Soil Profile Description
Horizon Depth (cm) Description
Ap
0-3
Dark brown (10YR 3/3 moist) humic sandy clay loam; weak moist consistence; fragment
structure; diffuse boundary.
Ap
3-10
Dark brown (10YR 3/3 moist) humic sandy clay loam; weak moist consistence; fragment
structure; clear, smooth boundary.
A
10-18
Brown (10YR 5/3 moist) sandy medium clay; weak moist consistence; angular blocky
structure; diffuse, smooth boundary.
A
18-43
Red (2.5YR 5/8 moist) sandy medium clay; weak moist consistence; massive structure;
diffuse, smooth boundary.
A
43-61
Red (2.5YR 5/6 moist) sandy medium clay; weak moist consistence; massive structure;
A2bs
61-71
B1
71-86
B1
86-102
B2
102-112
B22cb
112-127
127+
diffuse, smooth boundary.
Light brown (7.5YR 6/4 moist) fine sandy clay loam; strong dry consistence; massive
structure; ironstone coarse fragments and quartzite coarse fragments; notes: SECONDARY
SILICA INCREASING DOWN PROFILE; clear, irregular boundary.
Light brown (7.5YR 6/4 moist) coarse sandy clay loam; light olive grey (5Y 6/2 moist)
mottles and grey (5Y 6/1 moist) mottles; very strong dry consistence; massive structure;
few clay cutans; ironstone coarse fragments and quartzite coarse fragments; gradual
boundary.
Light brown (7.5YR 6/4 moist) coarse sandy clay loam; light olive grey (5Y 6/2 moist)
mottles and grey (5Y 6/1 moist) mottles; ironstone coarse fragments and quartzite coarse
fragments.
Light brown (7.5YR 6/4 moist) sandy medium clay; light olive grey (5Y 6/2 moist)
mottles; ironstone coarse fragments and quartzite coarse fragments; clear boundary.
Light brown (7.5YR 6/4 moist) coarse sandy medium clay; few ironstone fine gravel sized
coarse fragments and quartzite coarse fragments; clear boundary.
Notes: SILICIOUS LAYER (?pan).
Lab Results (501 P 0374)
Basic Chemistry
Sample
01
02
03
04
05
06
07
08
09
10
Horizon
1
2
3
4
5
6
7
8
9
10
Match
B
C
A
A
A
A
A
A
A
A
Depth
pH_w
EC
0-2
6.6
2-10
6.3
10-18
6.6
18-43
6
43-61
6.1
61-71
6.1
71-86
6.3
86-102
6.6
102-112
6.7
112-127
7.1
Cl_sol
6.5
3.9
9.5
5.7
4.5
3.6
2.4
2.1
2.7
2.1
LOI
60
36
60
36
36
24
12
24
24
36
OC_wb N_kjel
P_HCl
7.1
1.37
0.094
220
7.1
0.067
140
6.3
0.037
5.8
0.027
80
6
5.3
3.2
0.01
50
4.9
6.1
0.023
40
6.2
Exchangeable Cations
Sample
Horizon Match
01
02
03
04
07
09
1
2
3
4
7
9
B
C
A
A
A
A
Depth
Exch_Ca Exch_Na Exch_K Exch_Mg Exch_ac Exch_H Sum_Exc ESP
h
0-2
8.4
0.01
0.89
3
4.5
4.5 12.3 (1)
2-10
7.1
0.01
0.65
2.5
5.2
5.2 10.26 (1)
10-18
7.5
0.13
0.45
2.3
5.7
5.7 10.38 (1)
18-43
7.7
0.04
0.26
1
5.3
5.3
9 (1)
71-86
4.4
0.06
0.08
1
3.3
3.3 5.54 (1)
102-112
7.2
0.24
0.09
3.7
4.4
4.4 11.23 (1)
Particle Size Analysis
Sample
Horizon Match
Depth
01
02
03
04
07
10
1
2
3
4
7
10
0-2
2-10
10-18
18-43
71-86
112-127
B
C
A
A
A
A
gt2mm
s200_200 s20_200u silt
0u
26
27
24
24
23
22
28
20
5
39
26
6
41
18
clay
25
23
20
18
10
9
21
28
33
34
23
29
CaMgR_ Base_stat
Exch
0 (3)
2.8 (1) 58.57 (2)
0 (3) 2.84 (1) 36.64 (2)
1 (3) 3.26 (1) 31.45 (2)
0 (3)
7.7 (1) 26.47 (2)
1 (3)
4.4 (1) 24.09 (2)
2 (3) 1.95 (1)