Agency Code: 501 Project Code: TSL Site Code: 0698
Described by: Christopher Grose Date: 22/03/1993

Observation type: soil pit Category: full description
Lab Analyses: Detailed chemical and physical analyses.

Location: MGA94 Zone: 50  374923 mE  6731977 mN Map sheet:  Carnamah 100K
Location notes: 
Site notes: [doubtful duplex]
Disturbance: Cultivation, rainfed.

Landform
Landform pattern: plain
Relief/modal slope: undulating plains
Landform element: plain
Morphological type: mid-slope
Pattern Relief:  plain

Surface and Hydrological Properties
Rock outcrop:   
Surface coarse fragments: 
Physical properties: firm; 

Vegetation
Type:  low woodland; 
Notes: Euc. Baudiniana, Euc. Salmon, Euc loxophleba.

Species List
Eucalyptus loxophleba, Eucalyptus salmonophloia, Eucalyptus baudiniana

Land use
Site: Cropping (may include grazing in rotation). Surrounds: Cropping (may include grazing in rotation).

Visible erosion, assessed flooding and salinity
no wind erosion, no scald erosion, no sheet erosion, no rill erosion, no gully erosion, no tunnel erosion, no stbank erosion, no wave erosion, no mass movement, no flooding, no ponding, no salinity.

Current Classification
WA Soil Group: (1999) Alkaline red shallow loamy duplex, low alkaline
Australian Soil Classification: (2002) Haplic Calcic Red Chromosol
Soil Series: Butterabby 1
Map Unit: 226Ne_4

Other Classifications
Northcote PPF: Dr4.13

Soil Profile Description

Horizon | Depth (cm) | Description
Ap | 0-15 | Dark reddish brown (5YR 3/4 moist) clay loam, sandy; weak consistence, moderately sticky, moderately plastic; rough-ped fabric; pedal, moderate, 5-10 mm, subangular blocky structure; non-calcareous; pH 6.4; EC 0 mS/m; notes: Structure in layer 1 - very coarse plately breaking to medium subangular blocky.; clear boundary.
B1 | 15-60 | Dark red (2.5YR 3/6 moist) light clay; weak consistence, moderately sticky, moderately plastic; rough-ped fabric; pedal, strong, 10-20 mm, angular blocky structure; slightly calcareous; pH 7.5; EC 0 mS/m; notes: Ferromongonese concretions evident in layers 2, 3 & 4.  Roots penetrating to at least 100 cm.; gradual boundary.
B2 | 60-98 | Red (2.5YR 4/6 moist) light clay; weak consistence, moderately sticky, moderately plastic; rough-ped fabric; pedal, strong, 20-50 mm, angular blocky structure; slightly calcareous; pH 7.5; EC 0 mS/m; notes: Structure in layer 3 breaking from size 5 to 2.  Clay cutons evident on ped faces in layers 3 & 4.; gradual, wavy boundary.
B22t | 98-160 | Red (2.5YR 4/6 moist) light medium clay; weak consistence, moderately sticky, moderately plastic; rough-ped fabric; pedal,; moderately calcareous; pH 9; EC 0 mS/m; notes: Some corbonate accumulations in layer 4..
| 160+ | Light medium clay.

Lab Results (501 TSL 0698)

Basic Chemistry

Sample | Horizon | Match | Depth | pH_w | pH_CaCl2 | EC | CaCO3_tot | OC_wb | N_kjel | P_kjel | Al_CaCl2
A | 1 | B | 0-10 | 6.3 | 5.4 | 5 | | 1.1 | 0.07 | 280 | 1
B | 2 | B | 20-50 | 7.4 | 6.4 | 8 | | 0.46 | 0.054 | 210 |
C | 3 | B | 65-95 | 7.5 | 6.4 | 9 | | 0.17 | 0.031 | 160 |
D | 4 | B | 100-130 | 8.5 | 7.7 | 17 | 2 | 0.09 | 0.021 | 140 |

Exchangeable Cations

Sample | Horizon | Match | Depth | CEC | Exch_Ca | Exch_Na | Exch_K | Exch_Mg | Exch_Mn | Exch_Al | Sum_Exch | ESP | CaMgR_Exch | Exch_cats% | Base_stat
A | 1 | B | 0-10 | | 6.4 (2) | 0.21 (2) | 1 (2) | 2.1 (2) | 0.27 (2) | <0.02 (2) | 9.71 (1) | 2 (3) | 3.05 (1) | | 41.32 (2)
B | 2 | B | 20-50 | 16 (1) | 10 (1) | 1 (1) | 0.74 (1) | 3.7 (1) | | | 15.44 (1) | 6 (2) | 2.7 (1) | 97 (2) | 30.57 (2)
C | 3 | B | 65-95 | 17 (1) | 11 (1) | 1.5 (1) | 0.58 (1) | 3.8 (1) | | | 16.88 (1) | 9 (2) | 2.89 (1) | 99 (2) | 33.1 (2)
D | 4 | B | 100-130 | 19 (3) | 10 (3) | 1.7 (3) | 0.48 (3) | 3 (3) | | | 15.18 (1) | 9 (2) | 3.33 (1) | 80 (2) | 33.36 (2)

Particle Size Analysis

Sample | Horizon | Match | Depth | sand | silt | clay
A | 1 | B | 0-10 | 56 | 20.5 | 23.5
B | 2 | B | 20-50 | 33 | 16.5 | 50.5
C | 3 | B | 65-95 | 31 | 18 | 51
D | 4 | B | 100-130 | 35.5 | 19 | 45.5