Agency Code: 501 Project Code: REF Site Code: MRA07
Described by: Unknown Date: //

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

Location: MGA94 Zone: 50  347199 mE  6636030 mN 
Location notes: Cadda Road 6.9 km west of Brand Highway, 100 m south of Cadda Road.
Site notes: Landform/topography: Dissected lateritic plateau; site is on pediment stratigraphically below the laterite capping on almost flat landscape; Drainage: internal - restricted by clay substrate.

Landform
Landform pattern: plateau
Relief/modal slope:
Landform element:
Morphological type:
Pattern Relief:  plateau

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

Geology/parent material
Soil parent material:
Cretaceous sandstones and shales.

Species List
Tree: Nuytsia floribunda
Tall Shrubs: Kingia australis
Low Shrubs: Actinostrobus acuminatus, Allocasuarina humilis, Baeckea sp., Banksia sphaerocarpa, Boronia sp., Conospermum nervosum, Dryandra nivea, Dryandra sessilis, Hakea conchifolia, Hibbertia hypericoides, Hypocalymma xanthopetalum, Isopogon linearis, Lambertia multiflora, Leptospermum spinescens, Lysinema ciliatum, Xanthorrhoea drummondii
Ground: Anigozanthos humilis, Conostylis sp., Mesomelaena stygia, Mesomelaena tetragona

Current Classification
WA Soil Group: (1999) Duplex sandy gravel
Australian Soil Classification: (2002) Ferric Dystrophic Brown Chromosol, A thickness medium, A gravels non-gravelly, A texture sandy, B texture clayey, Soil Depth deep
ASC confidence: very high
Map Unit: 224Ye_3

Other Classifications
World Ref Base: (1998)  Ferric  Lixisol
FAO soil unit:  Plinthic Ferralsol
Northcote PPF: Dy5.81

Soil Profile Description

Horizon | Depth (cm) | Description
A1 | 0-7 | Dark grey (10YR 4/1 moist) loamy sand; very weak dry consistence; smooth-ped fabric; 5% gravel sized coarse fragments; clear boundary.
A2 | 7-20 | Yellowish brown (10YR 5/4 moist) loamy sand; loose consistence; apedal, single grain structure; 60% ferruginous gravel sized coarse fragments; sharp boundary.
B1 | 20-50 | Dark yellowish brown (10YR 3/6 moist) medium clay; few reddish brown (2.5YR 5/4 moist)  mottles; firm moist consistence; apedal, massive structure; 8% gravel sized coarse fragments; gradual boundary.
B21 | 50-70 | Strong brown (7.5YR 5/8 moist) medium clay; red (2.5YR 4/6 moist)  mottles; firm moist consistence; pedal, moderate structure; notes: porous; gradual boundary.
B22 | 70-100 | Brownish yellow (10YR 6/6 moist) sandy clay; white (10YR 8/2 moist)  mottles; firm moist consistence; apedal, massive structure; notes: porous.

Lab Results (501 REF MRA07)

Basic Chemistry

Sample | Horizon | Match | Depth | pH_w | pH_CaCl2 | EC | OC_wb | N_kjel | P_kjel | P_HCO3 | K_HCO3
A | 1 | A | 0-7 | 5.7 | 4.7 | 2 | 0.83 | 0.03 | 36 | <2 | 20
B | 2 | A | 7-20 | 5.7 | 4.8 | 2 | 0.83 | 0.03 | 43 | <2 | 20
C | 3 | A | 20-50 | 5.9 | 5.1 | 3 | 0.5 | 0.03 | 30 | <2 | 51
D | 4 | A | 50-70 | 5.9 | 5.1 | 2 | 0.13 | 0.01 | 25 | 2 | 53
E | 5 | A | 70-100 | 5.8 | 5.1 | 2 | 0.09 | 0.01 | 21 | <2 | 47

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 | 0-7 | 2 | 0.9 | <0.1 | <0.1 | 0.2 | 1.2 (1) | 4 (3) | 4.5 (1) | 60 (2) | 30 (2)
B | 2 | A | 7-20 | 2 | 0.9 | <0.1 | 0.1 | 0.4 | 1.45 (1) | 3 (3) | 2.25 (1) | 73 (2) | 20.71 (2)
C | 3 | A | 20-50 | 3 | 1 | <0.1 | 0.2 | 0.9 | 2.15 (1) | 2 (3) | 1.11 (1) | 72 (2) | 5.38 (2)
D | 4 | A | 50-70 | 2 | 0.8 | <0.1 | 0.1 | 1 | 1.95 (1) | 3 (3) | 0.8 (1) | 98 (2) | 4.15 (2)
E | 5 | A | 70-100 | 2 | 0.7 | <0.1 | 0.1 | 0.9 | 1.75 (1) | 3 (3) | 0.78 (1) | 88 (2) | 4.49 (2)

Particle Size Analysis

Sample | Horizon | Match | Depth | s200_2000u | sand | s20_200u | silt | clay
A | 1 | A | 0-7 | 34 | 94 (2) | 60 | 2 | 4
B | 2 | A | 7-20 | 32 | 91 (2) | 59 | 2 | 7
C | 3 | A | 20-50 | 29 | 56 (2) | 27 | 4 | 40
D | 4 | A | 50-70 | 18 | 46 (2) | 28 | 7 | 47
E | 5 | A | 70-100 | 22 | 56 (2) | 34 | 5 | 39