Reference soil Indonesia 47: Acrisol

ID047

Distribution of Acrisols

secondary forest developed after original Dipterocarp forest has been burned during forest fires of 1982/1983. Several original species still present.

Soil aggradation: accumulation of material behind roots and big trees.

Climate: see also data for Balikpapan.

Additional notes on profile description: A/E - also colour 10YR6/6

WRB 2006:

Cutanic Acrisol(Albic Alumic Hyperdystric)
3-40 cm	albic horizon
40-145 cm	argic horizon

FAO-UNESCO-ISRIC 1988:

FAO-UNESCO 1974:

Albi-

Haplic Acrisol

Ferric Acrisol

0-18 cm	ochric A horizon
3-40 cm	albic E horizon
40-145 cm	argic B horizon

0-18 cm	ochric A horizon
3-40 cm	albic E horizon
40-145 cm	argillic B horizon
	ferric properties

Other classification

Classification (other)	:
Deep, well drained, reddish yellow sandy clay, with a brownish yellow sandy loam eluviation horizon from a depth of 18 to 40 cm. The topsoil is a dark yellowish brown sandy loam. The B-horizon shows continuous thick clay cutans.

Location:

East Kalimantan, Sambodja,Wanariset, 2km on and 80m S of road to Semoi

More images

Physical

Particle size distribution:

Depth (cm)		Gravel (%)	Very Coarse Sand (%)	Coarse Sand (%)	Medium Sand (%)	Fine Sand (%)	Very Fine Sand (%)	Total Sand (%)	Coarse Silt (%)	Fine Silt (%)	Total Silt (%)	Clay (%)
0-3	:	-	0.6	3.0	22.2	22.4	14.3	-	12.3	13.4	-	11.8
3-18	:	-	0.3	2.9	21.3	23.9	13.2	-	10.9	14.6	-	12.9
18-40	:	-	0.4	2.4	17.8	21.3	15.7	-	9.9	16.9	-	15.7
40-70	:	-	0.4	2.0	16.1	19.0	12.0	-	11.4	14.6	-	24.6
70-115	:	-	0.3	1.8	13.6	16.4	12.3	-	9.5	15.9	-	30.0
115-145	:	-	0.3	1.9	13.6	16.3	11.0	-	11.2	13.1	-	32.7

Water retention characteristics

Depth (cm)		Bulk Density (kg/dm³)	pF 0 (% w/v)	pF 1.0 (% w/v)	pF 1.5 (% w/v)	pF 2.0 (% w/v)	pF 2.3 (% w/v)	pF 2.7 (% w/v)	pF 3.4 (% w/v)	pF 4.2 (% w/v)	pF 2.5 (%)	Bulk Density (kg/dm³)	pF 0 (% w/v)	pF 1.0 (% w/v)	pF 1.5 (% w/v)	pF 2.0 (% w/v)	pF 2.3 (% w/v)	pF 2.7 (% w/v)	pF 3.4 (% w/v)	pF 4.2 (% w/v)	pF 2.5 (%)
0-3	:	1.216	35.3	30.6	26.5	24.4	22.7	21.3	14.9	14.0	-	-	-	-	-	-	-	-	-	-	-
3-18	:	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
18-40	:	1.468	34.5	32.2	26.5	23.2	20.7	18.8	16.1	15.1	-	-	-	-	-	-	-	-	-	-	-
40-70	:	1.573	35.9	35.0	32.6	30.8	29.3	28.2	27.9	27.1	-	-	-	-	-	-	-	-	-	-	-
70-115	:	1.597	37.9	37.5	35.3	33.5	32.1	31.1	30.8	30.3	-
115-145	:	-	-	-	-	-	-	-	-	-	-

Other physical data

Depth (cm)		Bulk Density (kg/dm³)	Spec. Surf. Area (m2/g)	COLE (cm/cm)	Water Disp. Clay (%)	Clay (%)
0-3	:	-	-	-	4.2	11.8
3-18	:	-	-	-	7.2	12.9
18-40	:	-	-	-	12.8	15.7
40-70	:	-	-	-	20.6	24.6
70-115	:	-	-	-	14.0	30.0
115-145	:	-	-	-	22.3	32.7

Chemical characteristics:

Depth (cm)		pH H2O	pH KCl	EC 1 : 2.5 (mS/cm)	CaCO3 (%)	Org. C (%)	Org. N (%)	C / N	Exch. Acid (cmol/kg)	Exch. Al (cmol/kg)	Ca (cmol/kg)	Mg (cmol/kg)	K (cmol/kg)	Na (cmol/kg)	Sum Cations (cmol/kg)
0-3	:	4.1	3.4	0.18	-	2.41	-	-	-	-	0.4	0.3	0.3	0.1	-
3-18	:	4.3	3.8	0.10	-	1.14	-	-	-	-	0.2	0.3	0.1	0.1	-
18-40	:	4.4	3.9	0.04	-	0.25	-	-	-	-	0.2	0.0	0.1	0.0	-
40-70	:	4.4	3.8	0.03	-	0.18	-	-	-	-	0.2	0.0	0.1	0.2	-
70-115	:	4.4	3.7	0.04	-	0.19	-	-	-	-	0.2	0.0	0.1	0.1	-
115-145	:	4.4	3.8	0.03	-	0.14	-	-	-	-	0.2	0.0	0.1	0.0	-

Depth (cm)		CEC Soil (cmol/kg)	CEC Clay (cmol/kg)	CEC Org (cmol/kg)	ECEC (cmol/kg)	Base sat. (%)	Al sat. (%)	ESP (%)
0-3	:	-	-	8.4	-	-	-	1
3-18	:	-	-	4.0	-	-	-	2
18-40	:	-	-	0.9	-	-	-	0
40-70	:	-	-	0.6	-	-	-	4
70-115	:	-	-	0.7	-	-	-	2
115-145	:	-	-	0.5	-	-	-	0

Depth (cm)		pH NaF	P Retention (%)	ODOE	Melanic Index	Fe o (wt%)	Al o (wt%)	Si o (wt%)	Fe d (wt%)	Al d (wt%)	Fe p (wt%)	Al p (wt%)	C p (wt%)
0-3	:	-	-	-	-	-	-	-	0.40	0.10	-	-	-
3-18	:	-	-	-	-	-	-	-	0.50	0.10	-	-	-
18-40	:	-	-	-	-	-	-	-	0.70	0.10	-	-	-
40-70	:	-	-	-	-	-	-	-	1.10	0.20	-	-	-
70-115	:	-	-	-	-	-	-	-	1.30	0.20	-	-	-
115-145	:	-	-	-	-	-	-	-	1.40	0.20	-	-	-

Clay mineralogy:

Depth (cm)		Kaolinite	Mica / illite	Vermiculite	Chlorite	Smec	Halloysite	Mixed layer	Quar	Feldspar	Gibbsite	Goethite	Hematite
0-3	:	very large	very small	-	-	-	-	medium	medium	-	-	small	-
3-18	:	very large	small	-	-	-	-	medium	medium	-	-	small	-
18-40	:	very large	small	-	-	-	-	medium	medium	-	-	small	-
40-70	:	very large	small	-	-	-	-	medium	small	-	-	small	-
70-115	:	very large	small	-	-	-	-	medium	small	-	-	small	-
115-145	:	very large	small	-	-	-	-	medium	small	-	-	small	-

Rare clay minerals:

Depth (cm)		Pyroxene	Amphibole	Calcite	Lepidocrocite	Pyrophyllite	Weddelite	Augite
0-3	:	-	-	-	-	-	-	-
3-18	:	-	-	-	-	-	-	-
18-40	:	-	-	-	very small	-	-	-
40-70	:	-	-	-	very small	-	-	-
70-115	:	-	-	-	very small	-	-	-
115-145	:	-	-	-	very small	-	-	-

Profile description:

Ah 0-3 cm	dark yellowish brown (10YR 4/4, moist), sandy loam, moderate fine subangular blocky, very friable non sticky slightly plastic, no cutans, many very fine fine continuous exped and inped interstitial random pores and common continuous exped and inped interstitial random pores highly porous, no inclusions, no fragments, very frequent mycelium and worm channels, clear wavy boundary to,
A/E 3-18 cm	dark yellowish brown (10YR 4/4, moist), sandy loam, moderate medium subangular blocky, very friable non sticky slightly plastic, no cutans, common very fine fine continuous exped and inped interstitial random pores and few medium continuous exped and inped interstitial random pores moderat, no inclusions, no fragments, frequent worm channels and termite channels, clear wavy boundary to,
E 18-40 cm	brownish yellow (10YR 6/6, moist), sandy loam, moderate medium subangular blocky, firm non sticky slightly plastic, no cutans, common very fine fine continuous exped and inped interstitial random pores and few continuous exped and inped interstitial random pores slightly porou, no inclusions, no fragments, frequent worm channels and termite channels, gradual wavy boundary to,
Bt1 40-70 cm	brownish yellow (10YR 6/8, moist), sandy clay loam, strong medium and coarse subangular blocky, firm slightly sticky plastic, continuous thick clay on pedfaces cutans, common very fine fine continuous exped and inped interstitial random pores and few continuous exped and inped interstitial random pores slightly porou, no inclusions, no fragments, few worm channels, gradual wavy boundary to,
Bt2 70-115 cm	reddish yellow (7.5YR 6/8, moist), sandy clay, strong medium and coarse subangular blocky, firm slightly sticky plastic, few fine distinct sharp mottles (2.5YR 5/8) and few fine distinct mottles (2.5Y 7/6), continuous thick clay on pedfaces cutans, few very fine fine continuous exped and inped interstitial random pores and few continuous exped and inped interstitial random pores slightly porous (, no inclusions, no fragments, no, gradual wavy boundary to,
Bt3 115-145 cm	reddish yellow (7.5YR 6/8, moist), clay, strong medium and coarse subangular blocky, firm slightly sticky plastic, common fine distinct sharp mottles (10YR 8/2) and common medium distinct mottles (2.5YR 4/8), continuous thick clay on pedfaces cutans, few very fine fine continuous exped and inped interstitial random pores slightly porous (<40 vol%), no inclusions, no fragments, no

The main parent rock/ material over which the soil has been formed (1st entry)	sandstone
Mode of Accumulation or deposition of parent material (1st entry)	residual material
Texture of parent material (1st entry)	sandy
Weathering status of solid rock (1st entry)	highly
Resistance against weathering (solid rock) (1st entry)	poor
The main parent rock/ material over which the soil has been formed (2nd entry)	siltstone
Mode of Accumulation or deposition of parent material (2nd entry)	residual material
Texture of parent material (2nd entry)	clayey
Weathering status of solid rock (2nd entry)	highly
Resistance against weathering (solid rock) (2nd entry)	moderate

Current land use at the site	(semi-)natural vegetation
Vegetation Type;The natural vegetation at the site	deciduous forest
Status of vegetation	modified
Remarks on Land Use / Vegetation	Vegetation: Secondary forest developed after original Dipterocarp forest has been burned during forest fires of 1982/1983. Several original species still present.

The altitude of the soil profile relative to mean sea level, specified in meters	48 m asl
Regional landform	low hill
Topography of the surrounding country	steeply dissected
Physiographic Unit in the immediate surrounding of the site	SW-NE oriented ridges
The slope refers to the inclination of the land immediately surrounding the site. The measured or estimated slope angle is specified to the nearest per cent	22 %
The physiographic position of the site where the profile is located	upper slope
Form of the slope surrounding the site	convex
Slope Aspect of the site	south-west

Runoff	rapid
Flooding frequency	never
Estimated permeablity (class) of least permeable part of the profile	moderate
Drainage Class	well

Microrelief type: small-scale differences in relief in the direct vicinity of the site	dimples
Microrelief Pattern	closed depression
Microrelief Height	30
Rockiness	none
Stoniness	none
Cracks	no cracks observed
Slaking of aggregates by tillage, rainfall or frost	no surface slaking/crusting observed
Evidence of salt	non-saline
Evidence of alkali	non-alkaline

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Reference soil Indonesia 47: Acrisol