Skip to main content
You are here
Home
Reference soil United States of America 08: Rhodic Ferralsol
US008
Distribution of Ferralsols (rough estimation supplied by soilgrids)
Reference soil US008: Rhodic Ferralsols
Classification
FAO-UNESCO-ISRIC 1974Rhodic Ferralsol
Local classification:
Molokai Series
Other classification
USDA-SCS (1975)
Torrox aridic clayey kaolinitic isohyperthermic
Parent material
Kind 1 (parent material) ; Parker (eds), 1984
fine-grained basic igneous rock
Land use
Major crops
sugar cane
Main type of irrigation; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)
seasonally irrigated
Land use or vegetation in the immediate vicinity of the site
arable farming
Physiography
Altitude
136m
Physiographic Unit
slope
Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.
pediplain
Slope
2%
Topography; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)
undulating
Hydrology and drainage
Drainage class ; FAO (2006) - Guidelines for soil description
well
Dry From - To
0-175cm
Estimated permeability (class) of least permeable part of the profile
high
Surface characteristics
Evidence of alkali ; Soil Survey Manual USDA, 1951
non-alkaline
Evidence of salt; Soil Survey Manual USDA, 1951
non-saline
Physical characteristics
Particle size distribution
Depth (cm)
Gravel % v/v
very coarse sand % w/w
coarse sand % w/w
medium sand % w/w
fine sand % w/w
very fine sand % w/w
Total sand % w/w
coarse silt % w/w
fine silt % w/w
Total silt % w/w
Clay % w/w
0-20
-
0.1
0.9
1.6
1.5
0.8
4.9
24
38.6
62.6
32.6
20-50
-
0.1
0.6
1.3
1.6
0.9
4.5
22.3
42.3
64.6
31
50-90
-
0.1
0.5
1.3
1
0.5
3.4
18.3
36.3
54.6
41.9
90-125
-
0
0.1
0.3
0.4
1
1.8
22.1
34.7
56.8
41.4
125-175
-
0
0.1
0.3
2
3.2
5.6
22.2
29.3
51.5
43
Water retention characteristics
Depth (cm)
Bulk density kg/dm³
Spec. Surf. Area m²/g
COLE cm/cm
Water disp. clay %
Clay % w/w
0-20
-
-
-
26.1
32.6
20-50
-
-
-
25
31
50-90
-
-
-
1.5
41.9
90-125
-
-
-
0
41.4
125-175
-
-
-
0
43
Chemical data
Depth (cm)
pH H2O
pHKCl
EC 1: 2.5 dS/m
CaCO3 % w/w
C % w/w
N %
C / N
Exch. Acid cmol(c)/kg
Exch. Al cmol(c)/kg
Ca cmol(c)/kg
Mg cmol(c)/kg
K cmol(c)/kg
Na cmol(c)/kg
Sum Cations cmol(c)/kg
0-20
6.0
5.1
0.24
-
2.32
-
-
-
-
7.0
2.0
2.3
0.4
11.7
20-50
6.5
5.6
0.26
-
1.64
-
-
-
-
7.4
3.2
0.9
0.4
11.9
50-90
6.6
6.0
0.94
-
0.61
-
-
-
-
3.3
2.3
0.1
0.0
5.7
90-125
6.2
6.1
3.4
-
0.56
-
-
-
-
3.7
2.4
0.1
0.4
6.6
125-175
6.1
6.2
5.9
-
-
-
-
-
-
2.9
2.5
0.1
0.4
5.9
Depth (cm)
Base sat. %
CEC soil cmol(c)/kg
CEC clay cmol(c)/kg
CEC org cmol(c)/kg
ECEC cmol(c)/kg
Al sat. %
ESP %
0-20
73
16.1
49
8.1
-
-
-
20-50
88
13.6
44
5.7
-
-
-
50-90
119
4.8
11
2.1
-
-
-
90-125
153
4.3
10
2.0
-
-
-
125-175
155
3.8
9
-
-
-
-
Depth (cm)
pH NaF
P Retention %
ODOE
Al o % w/w
Si o % w/w
Fe d % w/w
Al d % w/w
Fe p % w/w
Al p % w/w
C p % w/w
Fe o % w/w
0-20
-
-
-
0.37
0.06
11.6
0.55
0.03
0.08
-
0.27
20-50
-
-
-
0.26
0.05
11.9
0.51
0.03
0.06
-
0.24
50-90
-
-
-
0.18
0.05
12.8
0.62
0.01
0.04
-
0.25
90-125
-
-
-
0.13
0.06
13.7
0.97
0.02
0.02
-
0.17
125-175
-
-
-
0.14
0.08
15
1.13
0.01
0.02
-
0.15
Clay mineralogy
Depth (cm)
Chlorite
Feldspar
Gibbsite
Goethite
Halloysite
Hematite
Kaolinite
Mica / illite
Mixed-layer
Quartz
Smec
Vermiculite
0-20
-
-
very weak to weak
very weak to weak
-
very weak to weak
weak
-
very weak to weak
very weak to weak
-
-
20-50
-
-
very weak to weak
very weak to weak
-
very weak to weak
weak
-
very weak to weak
very weak to weak
-
-
50-90
-
-
weak
very weak to weak
-
very weak to weak
weak to medium
-
very weak to weak
-
-
-
90-125
-
-
very weak
weak to medium
-
very weak to weak
medium to strong
-
-
-
-
-
125-175
-
-
-
weak to medium
-
very weak to weak
medium to strong
-
-
very weak to weak
-
-
Sand mineralogy
Depth (cm)
Heavy Frac. sand % w/w
K-Feldspar % w/w
Light Fra. sand % w/w
Opaque % w/w
Plagioclase % w/w
Quartz % w/w
90-125
75.3
-
24.7
100
-
10
Profile description
Ap 0-20 cm
dark reddish brown (2.5YR 3/4, moist)silty clay loam,weak very fine subangular blocky to weak medium subangular blocky,slightly hard friable slightly sticky slightly plastic,many fine pores,clear smooth boundary to,
Bo1 20-50 cm
dark reddish brown (2.5YR 3/4, moist)silty clay loam,weak coarse prismatic,slightly hard friable slightly sticky slightly plastic,many very fine pores and few pores,gradual smooth boundary to,
Bo2 50-90 cm
dark reddish brown (2.5YR 3/4, moist)silty clay loam,weak coarse prismatic,slightly hard friable sticky plastic,many very fine pores and common pores,gradual smooth boundary to,
Bo3 90-125 cm
dark reddish brown (2.5YR 3/4, moist)clay loam,weak coarse prismatic,slightly hard friable sticky plastic,broken thick clay cutans,clear smooth boundary to,
Bo4 125-175 cm
dark reddish brown (2.5YR 3/4, moist)clay loam,strong very fine and fine subangular blocky,hard firm sticky plastic,