Reference soil Jamaica 08: Cambisol

JM008

Cambisols occur mainly in the temperate and boreal regions of the world, where the soil’s parent material is still young or where low temperatures slow down the processes of soil formation.

Characteristics

Soils having either a cambic horizon (a horizon showing evidence of alteration with respect to the underlying material), or a mollic horizon overlying a subsoil, which has a base saturation of less than 50 percent in some part within 100 cm from the soil surface, or one of the following diagnostic horizons within the specified depth: an andic, vertic, or vitric horizon starting between 25 and 100 cm; a (petro-)plinthic or salic horizon starting between 50 and 100 cm, in absence of loamy sand or coarser textures above these horizons.

Distribution of Cambisols (rough estimation supplied by soilgrids)

Reference soil JM008: Cambisols

REFERENCES: Hafkenscheid R. 2000. Hydrology and biogeochemistry of tropical montane rain forests of contrasting stature in the Blue Mountains, Jamaica. Thesis Free University Amsterdam

Classification

WRB 2006

WRB 1998

Folic- Cambisol (Alumic Humic Skeletic)

Dystri-Skeletic- Cambisol (Dystric)

0-35 cm	folic horizon
35-100 cm	cambic horizon

0-35 cm	folic horizon
35-100 cm	cambic horizon
-	strongly humic

FAO-UNESCO-ISRIC 1988

FAO-UNESCO-ISRIC 1974

Dystri-Folic Histosol

Dystric Histosol

0-35 cm	histic H horizon
35-100 cm	cambic B horizon

0-35 cm	histic H horizon
35-100 cm	cambic B horizon

Other classification

USDA-NRCS (1999)	Typic Udifolist
USDA-SCS (1975)	Typic Tropofolist

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
30-35	3	-	-	-	-	-	-	-	-	-	21.4
35-40	44	-	-	-	-	-	-	-	-	-	6.4
40-65	44	-	-	-	-	-	-	-	-	-	4.1
65-100	40	-	-	-	-	-	-	-	-	-	5.2

Water retention characteristics

Depth (cm)	Bulk density kg/dm³	Spec. Surf. Area m²/g	COLE cm/cm	Water disp. clay %	Clay % w/w
30-35	0.4	-	-	-	21.4
35-40	0.5	-	-	-	6.4
40-65	0.6	-	-	-	4.1
65-100	0.8	-	-	-	5.2

Other physical data

Depth (cm)	Bulk density kg/dm³	pF 0 % v/v	pF 1.0 % v/v	pF 1.5 % v/v	pF 2.0 % v/v	pF 2.3 % v/v	pF 2.7 % v/v	pF 3.4 % v/v	pF 4.2 % v/v
30-35	0.4	-	-	-	36.9	-	-	-	10.9
35-40	0.5	-	-	-	39.9	-	-	-	9.4
40-65	0.6	-	-	-	35.8	-	-	-	9.0
65-100	0.8	-	-	-	41.1	-	-	-	8.7

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
0-3	4.7	-	-	-	-	-	-	-	-	22.8	10.2	1.4	0.6	35.0
3-8	3.6	-	-	-	-	-	-	-	-	4.9	8.7	1.4	0.8	15.8
8-30	3.4	-	-	-	-	-	-	-	-	0.8	3.2	0.7	0.6	5.3
30-35	3.9	-	-	-	-	1.45	18	-	-	0.2	0.2	0.2	0.2	0.8
35-40	4.4	-	-	-	-	0.69	17	-	-	0.2	0.1	0.0	0.1	0.6
40-65	4.9	-	-	-	-	0.18	17	-	-	0.2	0.1	0.0	0.1	0.6

Depth (cm)	CaSO4.2H2O %	P Bray mg/kg	P Olsen mg/kg	pH CaCl2	clay_noncarbonate % w/w	clay_carbonate % w/w	phosphorus4 mg/kg	phosphorus1 mg/kg	total_sulfur % w/w
0-3	-	-	-	4.5	-	-	-	-	-
3-8	-	-	-	2.9	-	-	-	-	-
8-30	-	-	-	2.9	-	-	-	-	-
30-35	-	-	-	3.2	-	-	-	-	-
35-40	-	-	-	3.9	-	-	-	-	-
40-65	-	-	-	4.4	-	-	-	-	-

Elemental composition of the soil

Depth (cm)	Al2O3 % w/w	CaO % w/w	Fe2O3 % w/w	K2O % w/w	MgO % w/w	Na2O % w/w	SiO2 % w/w	TiO2 % w/w
30-35	8.6	0.04	5.8	0.3	0.1	0.1	24.9	0.7
35-40	17.1	0.02	10.4	0.6	1.1	0.2	38.8	1.0
40-65	24.9	0.03	11.1	1.3	3.0	0.4	44.8	1.0
65-100	22.2	0.02	9.4	2.4	3.3	0.3	54.9	0.9
100-	20.0	0.04	10.2	2.6	4.9	1.0	54.4	0.8

Depth (cm)	Al2O3/Fe2O3 mol/mol	LOI % w/w	MnO2 % w/w	P2O5 % w/w	SiO2 / Al2O3 mol/mol	SiO2/Fe2O3 mol/mol	SiO2 / R mol/mol
30-35	-	59.3	0.0	0.3	-	-	-
35-40	-	30.5	0.1	0.2	-	-	-
40-65	-	13.4	0.1	0.1	-	-	-
65-100	-	6.1	0.2	0.1	-	-	-
100-	-	5.8	0.1	0.1	-	-	-

Profile description

Oi 0-3 cm	leaves slightlyhighly porous (>60 vol%),abrupt boundary to,
Oe 3-8 cm	organic moderatelyporous massive,highly porous (>60 vol%),many very fine roots,clear wavy boundary to,
8-30 cm	(10YR 1.7/1, moist)organic highly,medium crumb,very firm non sticky,many pores highly porous (>60 vol%),many very fine and fine roots,clear irregular boundary to,
Ah 30-35 cm	(7.5YR 2/3, moist)silt loam,granular,very friable,broken humus cutans,many pores highly porous (>60 vol%),few very fine few coarse roots,abrupt smooth boundary to,
Bh 35-40 cm	(dark) brown (10YR 4/3, moist)silt,weak fine and medium crumb,very friable sticky,common fine to coarse pores moderately porous (40-60 vol%),few roots,very few coarse gravel and stones strongly weathered andesite fragments,abrupt smooth boundary to,
Bw 40-65 cm	(10YR 4/3.5, moist)silt loam slightly gravelly,very friable sticky,many fine medium pores moderately porous (40-60 vol%),few roots,frequent coarse gravel and stones weathered andesite fragments,abrupt smooth boundary to,
65-100 cm	(10YR 4/4.5, moist)coarse sandy loam gravelly,fine and medium subangular blocky,friable slightly sticky,many fine medium pores moderately porous (40-60 vol%),many coarse gravel and stones weathered andesite fragments,

Depth1	65cm
Kind 1 (parent material) ; Parker (eds), 1984	andesite
Mode of accumulation or deposition of parent material	ejecta ash
Remarks on Parent Materials	andesitic tuff and lava; Purple Volcanics Formation of Cretaceous age
Soil Depth	65cm
Texture of parent material	loamy
Texture of parent material (second entry)	loamy
Weathering Resistance	poor
General characterization of the status of weathering of solid rock	partially or moderately

Remarks on Land Use / Vegetation	VEGETATION: Dominant species Lyonia cf. octandra (46%) and Cyrilla racemiflora (23%)
Status of vegetation; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	primary
Major vegetation type; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	closed forest

Altitude	1824m
Physiographic Unit	ridge, gently sloping in N direction
Physiographic position of the site	crest
Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.	mountain
Slope	5%
Topography; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	mountainous

Drainage class ; FAO (2006) - Guidelines for soil description	well
Flooding frequency (FAO, 1986)	never
Moist From - To	0-100cm
Estimated permeability (class) of least permeable part of the profile	high
Estimated run off (class)	rapid

You are here

Reference soil Jamaica 08: Cambisol

Characteristics

Reference soil JM008: Cambisols

Classification