Reference soil Nigeria 14: Gleyic Luvisol

NG014

Distribution of Luvisols (rough estimation supplied by soilgrids)

Reference soil NG014: Gleyic Luvisols

Parent material: At about 100 cm in situ weathered banded gneiss. Physiographic unit: Valley bottom, valley is v-shaped up and down stream surrounded with a rolling topography. Vegetation: Shrubs, but no grass in lower storey; larger trees: Stercula tragacantha and Chleistopholis patens. INRA classification: Sol hydromorphe peu humifere a pseudogley a nappe perche. Additional notes on profile description: A1: Also with some coarse roots. A3: Strong brown mottles. B1: Slighly grayer sandy streaks. B21tg: Mottles yellowish brown. B22tg: Vertical cracks 20 to 40 cm apart and less than 1 cm wide, extending slightly above and below the B3g horizon; yellowish brown mottles; laterite (Fe/Mn-) concretionsranging from soft to hard; some streaks with humiferous material from above. B3g: In patches brownish mottles prominent. 2C2g: Weathered rock. Brief description of the profile: The profile shows a coarse to gravelly sandy loam texture with a moderate crumb structure from 0-10 cm and suban

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	-	-	-	-	1.65	0.07	24	-	-	-	-	-	-	-
20-40	-	-	-	-	0.69	0.03	23	-	-	-	-	-	-	-
40-60	-	-	-	-	0.23	0.02	12	-	-	-	-	-	-	-
60-80	-	-	-	-	0.14	0.02	7	-	-	-	-	-	-	-
80-100	-	-	-	-	0.12	0.01	12	-	-	-	-	-	-	-
100-117	-	-	-	-	0.15	0.01	15	-	-	-	-	-	-	-

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	-	-	-	5.8	-	-	-
20-40	-	-	-	2.4	-	-	-
40-60	-	-	-	0.8	-	-	-
60-80	-	-	-	0.5	-	-	-
80-100	-	-	-	0.4	-	-	-
100-117	-	-	-	0.5	-	-	-

Profile description

Ah 0-10 cm	greyish brown (10YR 5/2, dry) very dark greyish brown (10YR 3/2, moist)sandy loam,moderate fine and medium crumb,soft,many medium interstitial pores and common tubular pores,gradual smooth boundary to,
10-30 cm	brown (10YR 5/3, dry) (dark) brown (10YR 4/3, moist)sandy loam slightly gravelly,weak fine subangular blocky weak medium subangular blocky,hard,few fine distinct mottles and few medium distinct mottles,common fine tubular pores,gradual wavy boundary to,
BA 30-45 cm	pale brown (10YR 6/3, dry) (dark) brown (10YR 4/3, moist)sandy loam,moderate fine subangular blocky,many fine tubular pores,clear wavy boundary to,
Btg1 45-55 cm	weak red (2.5YR 5/2, moist)sandy clay loam slightly gravelly,moderate fine subangular blocky,very hard,many fine distinct mottles and many medium distinct mottles,patchy thin clay in root channels and pores cutans,common fine inped tubular random pores,clear wavy boundary to,
Btg2 55-80 cm	weak red (2.5YR 5/2, moist)sandy clay gravelly,moderate to strong fine subangular blocky,extremely firm,many fine distinct mottles and many medium prominent mottles,broken thin clay on pedfaces cutans,few fine inped tubular pores,frequent ferruginous frequent manganiferous,gradual wavy boundary to,
BCg 80-103 cm	reddish brown (5YR 5/3, moist)sandy clay loam gravelly,moderate fine angular blocky and moderate fine subangular blocky,extremely firm,common fine distinct mottles and common medium distinct mottles,broken thin clay on pedfaces cutans,few fine inped tubular random pores,frequent irregular soft ferruginous nodules frequent irregular hard manganiferous nodules,few fine gravel angular quartz fragments,gradual wavy boundary to,
2Cg1 103-160 cm	light grey (10YR 7/2, moist)sandy clay loam gravelly,moderate fine subangular blocky,firm,many medium prominent mottles (10YR 5/6),few fine tubular pores,few irregular soft ferruginous nodules few irregular soft manganiferous nodules,few fine gravel angular quartz fragments,
2Cg1 103-160 cm	stones

- cm	argillic B horizon
-	hydromorphic
-	lithic contact

Depth1	103cm
Kind 2 (parent material) (second entry); Parker (eds), 1984	gneiss
Mode of accumulation or deposition of parent material	fluvial
Mode of accumulation or deposition of parent material (second entry)	residual material
Texture of parent material	clayey
Texture of parent material (second entry)	loamy
Weathering Resistance	high

Major crops	oil palm
Land use or vegetation in the immediate vicinity of the site	(semi-)natural vegetation
Remarks on Land Use / Vegetation	See remarks
Status of vegetation; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	secondary
Major vegetation type; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	woodland

Altitude	282m
Physiographic Unit	see remarks
Physiographic position of the site	open depression
Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.	valley
Slope	1%
Slope Aspect	south-east
Form of the slope surrounding the site	straight
Topography; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	flat or almost flat

Drainage class ; FAO (2006) - Guidelines for soil description	poor
Dry From - To	0-45cm
Kind of ground water table (USDA, 1979)	no groundwater table observed
Moist From - To	45-160cm
Estimated permeability (class) of least permeable part of the profile	slow

You are here

Reference soil Nigeria 14: Gleyic Luvisol

Reference soil NG014: Gleyic Luvisols

Classification