Reference soil Oman 01: Haplic Yermosol

OM001

Distribution of Yermosols (rough estimation supplied by soilgrids)

Reference soil OM001: Haplic Yermosol

VEGETATION: SPECIE ABUNDANCE Grantia senecioides common Haloxylon salicornicum common Acacia sp. few ADDITIONAL NOTES ON PROFILE DESCRIPTION: Absence of any marked CaCO3 accumulation in profile above gravels. Bk2 - mottles: CaCO3. 2Ck - CaCO3 pendants on gravel. 180+ - horizon too cemented to dig.

Classification

FAO-UNESCO-ISRIC 1974Haplic 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
0-23	-	2.5	2.6	2.8	5.7	19.5	33.1	11.7	31.4	43.1	23.8
23-54	-	1.7	2	2.8	7.3	20.6	34.4	9.6	25.9	35.5	30
54-131	-	1.2	2.2	3.2	10	25.2	41.8	8.1	20.6	28.7	29.6
131-150	-	20.8	17.9	12.6	7.6	8.6	67.5	4	11.7	15.7	16.9

Water retention characteristics

Depth (cm)	Bulk density kg/dm³	Spec. Surf. Area m²/g	COLE cm/cm	Water disp. clay %	Clay % w/w
0-23	-	-	-	-	23.8
10-20	1.271	-	-	-	-
25-32	1.419	-	-	-	-
23-54	-	-	-	-	30
54-131	-	-	-	-	29.6
58-68	1.494	-	-	-	-
131-150	-	-	-	-	16.9

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
10-20	1.271	48.6	46.2	39.5	32.2	29.4	25.8	20.1	17
25-32	1.419	46.3	44.9	39.6	33.7	31	27.7	21.9	18.6
58-68	1.494	41.6	40.8	38	33.8	31.8	28.6	27.2	26.2

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
0-23	8.3	8.0	1.4	35.5	0.98	-	-	-	-	11.0	5.7	0.7	0.7	18.1
23-54	8.4	8.0	0.8	35.5	0.40	-	-	-	-	8.1	5.5	0.5	0.0	14.1
54-131	8.8	8.0	0.3	35	0.22	-	-	-	-	7.2	5.8	0.5	0.0	13.5
131-150	8.8	8.3	0.2	31.5	0.13	-	-	-	-	4.5	3.0	0.2	0.0	7.7

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 %
0-23	110	16.4	69	3.4	-	-	-
23-54	97	14.5	48	1.4	-	-	-
54-131	105	12.9	44	0.8	-	-	-
131-150	117	6.6	39	0.5	-	-	-

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
0-23	0.82	0.86	0.13	2.1	3.91	0	0.42	2.24	0.31	0.97	3.94
23-54	0.38	0.47	0.05	1.11	2.01	0	0.44	0.96	0.09	0.62	2.11
54-131	0.15	0.21	0.03	0.29	0.68	0	0.56	0.16	0.02	0.16	0.9
131-150	0.12	0.17	0.03	0.18	0.5	0	0.44	0.08	0.01	0.12	0.65

Depth (cm)	Sodium ads. ratio	pH e	EC e dS/m	EC 1 : 5 dS/m
0-23	1.88	-	-	0.63
23-54	1.42	-	-	0.12
54-131	0.57	-	-	0.13
131-150	0.4	-	-	0.1

Profile description

A 0-24 cm	yellowish brown (10YR 5/4, dry)silt loam,weak medium subangular blocky,loose,common fine pores,gradual smooth boundary to,
Bk1 24-54 cm	dark yellowish brown (10YR 4/4, dry)silty clay loam,weak to moderate medium subangular blocky,slightly hard,common fine pores,few soft calcareous,gradual smooth boundary to,
Bk2 54-131 cm	yellowish brown (10YR 5/4, dry)silty clay loam,moderate medium subangular blocky,hard,few fine mottles,broken cutans,many fine pores,gradual smooth boundary to,
2Ck 131-180 cm	pale brown (10YR 6/3, dry)clay loam very gravelly,massive,few fine pores,

Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.	alluvial plain
Slope	0%
Topography; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	flat or almost flat

Surface cracking	small cracks (width less than 1 cm, or depth less than 50 cm)
Micro relief type: small-scale differences in relief in the direct vicinity of the site (FAO, 1986)	level

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Reference soil Oman 01: Haplic Yermosol

Reference soil OM001: Haplic Yermosol

Classification