Agency Code: 501 Project Code: REF Site Code: MER02
Described by: Eric Bettenay Date: 01/01/1961

Observation type: Unknown Category: 
Lab Analyses: Detailed chemical and physical analyses.

Location: MGA94 Zone: 50  659741 mE  6527150 mN Elevation (m): 345  
Location notes: 40 km east of Merredin. In Carrabin Town Reserve. 0.4 km east of Carrabin Store (Westonia Road). 100 m south of Great Eastern Highway.
Site notes: From Bettenay & Hingston (1961)

Surface and Hydrological Properties
Rock outcrop:   
Surface coarse fragments: 
Physical properties: Hardsetting; ; slow profile permeability

Geology/parent material
Soil parent material:
Alluvium from break down of granite rocks and dolerite dykes.

Vegetation
Notes: Salmon gum - gimlet woodland.

Species List
Tree: Eucalyptus salubris, Eucalyptus salmonophloia
Medium Shrubs: Acacia colletioides, Acacia hemiteles, Acacia microbotrya, Alyxia buxifolia, Melaleuca adnata, Santalum acuminatum, Templetonia sulcata
Ground: Stipa elegantissima, Threlkeldia diffusa

Current Classification
WA Soil Group: (1999) Alkaline red shallow loamy duplex
Australian Soil Classification: (2002) Epibasic Pedal Calcic Calcarosol, A thickness thin, A gravels non-gravelly, A texture loamy, B texture clayey, Soil Depth moderately deep
ASC confidence: very high
Soil Series: Merredin
Map Unit: 258Ba_3

Other Classifications
World Ref Base: (1998)  Hypocalcic  Calcisol
FAO soil unit:  Xanthic Ferralsol
Northcote PPF: Dr2.53

Soil Profile Description

Horizon | Depth (cm) | Description
A1 | 0-6 | Dark reddish brown (5YR 3/4 moist) loam; firm consistence; pedal, moderate structure; notes: very porous; clear boundary.
B1 | 6-15 | Dark red (2.5YR 3/6 moist) light clay; firm consistence; pedal, moderate structure; 1% calcareous soft segregations; 1% quartz fine gravel sized coarse fragments; notes: porous; clear boundary.
B21 | 15-35 | Red (2.5YR 4/8 moist) light clay; firm consistence; pedal, moderate structure; 21% calcareous soft segregations; 1% quartz gravel sized coarse fragments and  1% calcareous coarse fragments gravel (3 - 10 mm); notes: porous; gradual boundary.
B22 | 35-75 | Yellowish red (5YR 4/6 moist) medium clay; very firm consistence; pedal, moderate structure; 24% calcareous soft segregations; 3% calcareous coarse fragments; notes: porous; gradual boundary.
B23 | 75-90 | Yellowish red (5YR 4/7 moist) medium clay; very firm consistence; pedal, moderate structure; 14% calcareous soft segregations; 5% calcareous coarse fragments; notes: porous.

Lab Results (501 REF MER02)

Basic Chemistry

Sample | Horizon | Match | Depth | pH_w | pH_CaCl2 | EC | OC_wb | N_kjel | P_kjel | P_HCO3 | K_HCO3 | Al_CIDI | Al_Ox | Fe_CIDI | Fe_Ox
A | 1 | A | 0-6 | 7.4 | 6.8 | 10 | 12 | 0.11 | 100 | 14 | >300 | | | |
B | 2 | A | 6-15 | 7.8 | 7.2 | 11 | 0.69 | 0.06 | 71 | 12 | >300 | 0.1 | 0.11 | 1 | 0.03
C | 3 | A | 15-35 | 8.7 | 8 | 19 | 0.45 | 0.05 | 72 | 3 | 220 | | | |
D | 4 | A | 35-75 | 9.1 | 8.2 | 33 | | | | 2 | 220 | | | |
E | 5 | A | 75-90 | 9.2 | 8.3 | 53 | | | | 3 | >300 | | | |

Exchangeable Cations

Sample | Horizon | Match | Depth | CEC | Exch_Ca | Exch_Na | Exch_K | Exch_Mg | Sum_Exch | ESP | CaMgR_Exch | Exch_cats% | Base_stat
A | 1 | A | 0-6 | 18 | 13 | 0.3 | 1.4 | 3.3 | 18 (1) | 2 (3) | 3.94 (1) | 100 (2) | 72 (2)
C | 3 | A | 15-35 | 22 | 11 | 0.7 | 0.7 | 6.6 | 19 (1) | 4 (3) | 1.67 (1) | 86 (2) | 39.58 (2)
E | 5 | A | 75-90 | 21 | 5.8 | 3.4 | 1 | 8.7 | 18.9 (1) | 18 (3) | 0.67 (1) | 90 (2) | 38.57 (2)

Particle Size Analysis

Sample | Horizon | Match | Depth | s200_2000u | sand | s20_200u | silt | clay
A | 1 | A | 0-6 | 36 | 59 (2) | 23 | 16 | 25
C | 3 | A | 15-35 | 19 | 36 (2) | 17 | 16 | 48
E | 5 | A | 75-90 | 23 | 39 (2) | 16 | 12 | 49