Reference soil Oman 04: Luvic Yermosol

OM004

Distribution of Yermosols (rough estimation supplied by soilgrids)

Reference soil OM004: Luvic Yermosols

PHYSIOGRAPHY: Basin receiving terminal deposits from Wadi uwayyah during seasonal inundation. SURFACE CHARACTERISTICS: Dry, curling slip cap. VEGETATION: SPECIE ABUNDANCE Pulicaria undulata common Acacia sp. common annuals few WATER TABLE: Falling steadily. ADDITIONAL NOTES ON PROFILE DESCRIPTION: Bu - inclusions: pseudomycelia. Btk - few fine irregular cracks. Bk1 - mottles: black. nodules: also few fine calcareous and common fine manganiferous. 2Cy - gypsum crystals: 20%. mottles: rust. gravel: rounded. 3C - marl.

Classification

FAO-UNESCO-ISRIC 1974Luvic Yermosol

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
0-13	-	0.1	0.2	0.4	15.5	45.4	61.6	7.1	15	22.1	16.4
13-34	-	2.3	0.9	0.7	21.9	47.8	73.6	4.7	9.9	14.6	11.8
34-110	-	0.6	0.5	0.3	4.1	10.2	15.7	7.7	27.8	35.5	48.8
110-147	-	0.3	0.2	0.8	15.2	46.8	63.3	8.7	9.3	18	18.7
147-180	-	0.2	0.2	0.6	16.8	39	56.8	7.7	15.6	23.3	19.9
180-200	-	1.9	1.3	1	31.9	33.9	70	5.2	9.2	14.4	15.6

Water retention characteristics

Depth (cm)	Bulk density kg/dm³	Spec. Surf. Area m²/g	COLE cm/cm	Water disp. clay %	Clay % w/w
0-13	-	-	-	-	16.4
13-34	-	-	-	-	11.8
34-110	-	-	-	-	48.8
110-147	-	-	-	-	18.7
147-180	-	-	-	-	19.9
180-200	-	-	-	-	15.6

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
0-13	8.4	7.7	0.23	38.4	0.31	-	-	-	-	10.8	1.7	0.7	0.0	13.2
13-34	8.6	7.9	0.15	37.3	0.13	-	-	-	-	8.4	1.4	0.6	0.0	10.4
34-110	8.5	7.4	0.2	35.2	0.16	-	-	-	-	11.8	4.4	1.1	0.0	17.3
110-147	8.6	8.0	0.25	44.4	0.06	-	-	-	-	5.7	2.3	0.5	0.0	8.5
147-180	8.8	8.2	0.19	42.6	0.04	-	-	-	-	4.5	1.5	0.4	0.0	6.4
180-200	7.9	7.5	2.1	22.9	0.04	-	-	-	-	41.3	0.3	0.2	0.0	41.8

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 %
0-13	127	10.4	63	1.1	-	-	-
13-34	122	8.5	72	0.5	-	-	-
34-110	106	16.3	33	0.6	-	-	-
110-147	144	5.9	32	0.2	-	-	-
147-180	183	3.5	18	0.1	-	-	-
180-200	-	3.5	22	0.1	-	-	-

Soluble sands

Depth (cm)	Ca mmol(c)/kg	Mg mmol(c)/kg	K mmol(c)/kg	Na mmol(c)/kg	sum cations mmol(c)/kg	CO3 mmol(c)/kg	HCO3 mmol(c)/kg	Cl mmol(c)/kg	NO3 mmol(c)/kg	SO4 mmol(c)/kg	sum anions mmol(c)/kg
0-13	0.35	0.08	0.07	0.04	0.54	0	0.49	0.08	-	0.14	0.71
13-34	0.3	0.08	0.08	0.02	0.48	0	0.46	0.12	0.01	0.1	0.69
34-110	0.31	0.13	0.07	0.07	0.58	0	0.55	0.1	0.01	0.12	0.78
110-147	0.22	0.21	0.07	0.11	0.61	0	0.47	0.08	-	0.27	0.82
147-180	0.22	0.21	0.07	0.11	0.61	0	0.46	0.05	0.02	0.24	0.77
180-200	15.51	0.26	0.04	0.05	15.86	0	0.23	0.24	0.01	16.92	17.4

Depth (cm)	Sodium ads. ratio	pH e	EC e dS/m	EC 1 : 5 dS/m
0-13	0.06	-	-	0.11
13-34	0.03	-	-	0.1
34-110	0.11	-	-	0.11
110-147	0.19	-	-	0.12
147-180	0.19	-	-	0.13
180-200	0.01	-	-	1.61

Profile description

A 0-13 cm	yellowish brown (10YR 5/4, moist)silt loam,very weak medium subangular blocky,very friable,few fine pores and common pores,gradual smooth boundary to,
B 13-34 cm	yellowish brown (10YR 5/4, moist)very fine sandy loam slightly gravelly,very weak fine subangular blocky,very friable,few fine pores and common pores,few thread-like calcareous crystals,clear smooth boundary to,
Btk 34-110 cm	(dark) brown (10YR 4/3, moist)silty clay loam,moderate to strong medium subangular blocky,firm,few medium faint mottles (10YR 5/8),broken moderately thick on pedfaces cutans,few fine medium pores,frequent medium soft calcareous concretions frequent small manganiferous concretions,clear smooth boundary to,
Bk1 110-147 cm	yellowish brown (10YR 5/4, moist)silt loam,very weak fine subangular blocky,friable,common medium distinct mottles,few fine medium pores,frequent large calcareous nodules frequent medium manganiferous nodules,clear smooth boundary to,
Bk2 147-180 cm	light yellowish brown (10YR 6/4, moist)sandy clay loam,structureless massive,friable,many fine faint mottles (10YR 5/6),few fine pores and common pores,frequent large soft calcareous nodules frequent medium manganiferous nodules,clear smooth boundary to,
2Ck1 180-200 cm	very pale brown (10YR 7/4, moist)silty clay,moderate medium angular blocky,sticky,common medium faint mottles (10YR 5/6),few medium pores,very frequent large soft calcareous nodules frequent large manganiferous nodules,
2Ck2 200-240 cm	pale brown (10YR 6/3, moist)silty clay loam,
2Ck3 240-280 cm	pale brown (10YR 6/3, moist)clay loam,friable,
2Ck4 280-310 cm	very pale brown (10YR 7/4, moist)clay,very plastic,clay in root channels and pores cutans,
2Cy 310-380 cm	very pale brown (10YR 7/4, moist)clay slightly gravelly,very plastic,few fine mottles,clay in root channels and pores cutans,gypsiferous crystals,
3C 380-460 cm	pale brown (10YR 6/3, moist)clay loam,

Physiographic Unit	Enclosed silty alluvial basin
Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.	basin
Slope	0%

Drainage class ; FAO (2006) - Guidelines for soil description	moderately well
Flooding frequency (FAO, 1986)	yearly
Nature of flood water	fresh
Depth to groundwater table	200cm
Kind of ground water table (USDA, 1979)	groundwater table observed

Slaking of aggregates by tillage, rainfall or frost (USDA/SCS, 1979)	surface capped, crust on drying
Micro relief type: small-scale differences in relief in the direct vicinity of the site (FAO, 1986)	level

You are here

Reference soil Oman 04: Luvic Yermosol

Reference soil OM004: Luvic Yermosols

Classification