Reference soil Indonesia 51: Acrisol

ID051

Acrisols occur dominantly in the wetter parts of the tropics and subtropics and the warm temperate regions in relatively young landscapes.

Characteristics

Soils having an argic horizon (a subsurface horizon with distinct higher clay content than the overlying horizon), which has a cation exchange capacity of less than 24 cmolc per kg in some part, either starting within 100 cm from the soil surface, or within 200 cm from the soil surface if the argic horizon is overlain by loamy sand or coarser textures throughout. They have a base saturation (total amount of Ca, Mg, K and Na with respect to the cation exchange capacity) of less than 50 percent in the major part between 25 and 100 cm from the soil surface

Distribution of Acrisols (rough estimation supplied by soilgrids)

Reference soil ID051: Acrisol

WRB 2014

Acrisol

Local classification

Classification information	Podsol Merah Kuning

Location:

North of Danau Sentarum, Keluin, Nanga Bekuan. Hilly plain in tributuary of Kapuas Hulu river, Sungai Lebojan

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Physical characteristics

Water retention characteristics

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
2-16	0.75	-	-	0.59	0.57	-	-	-	0.11
16-22	1.06	-	-	0.6	0.57	-	-	-	0.16
22-35	1.12	-	-	0.53	0.5	-	-	-	0.21
35-58	1.36	-	-	0.5	0.48	-	-	-	0.21
58-112	1.31	-	-	0.55	0.54	-	-	-	0.29

Depth (cm)	pf_05 cm³/cm³	pf_25 cm³/cm³	pf_30 cm³/cm³	pf_35 cm³/cm³	pf_6 cm³/cm³	pf_7 cm³/cm³
2-16	0.66	0.53	-	0.16	0.04	-
16-22	0.62	0.54	-	0.23	0.03	-
22-35	0.58	0.48	-	0.24	-	-
35-58	0.53	0.46	-	0.31	-	-
58-112	0.56	0.52	-	0.36	-	-

Profile description

AP 0-14 cm	very dark greyish brown(10YR 3/2, moist) ; silt loam weak coarse / thick subangular blocky ; very friable non-sticky slightly plastic ; no cutans; common pores; many coarse many fine many very fine many very fine roots; channels medium (2-5 mm) pans; many ; non-calcareous (0%) 4.5 ; clear (2-5 cm) smooth; nearly plane surface boundary to
A;Ep 14-20 cm	yellowish brown(10YR 5/8, moist) ; loam weak coarse / thick subangular blocky ; very friable non-sticky slightly plastic ; no cutans; abundant (> 40%) prominent diffuse (> 2 mm) dark greyish brown coarse (> 20 mm) mottles; very few pores; few fine few very fine roots; vughs fine (0.5-2 mm) pans; common ; non-calcareous (0%) 4.5 ; clear (2-5 cm) smooth; nearly plane surface boundary to
E 20-33 cm	strong brown(7.5YR 5/8, moist) ; silty clay loam moderate coarse / thick subangular blocky ; friable slightly sticky slightly plastic ; no cutans; few (2-5%) distinct clear (0.5-2 mm) brown fine (2-6 mm) mottles; very few pores; very few very fine roots; vughs fine (0.5-2 mm) pans; few earthworm channels ; non-calcareous (0%) 4.5 ; clear (2-5 cm) smooth; nearly plane surface boundary to
E;B4 33-56 cm	strong brown(7.5YR 5/8, moist) ; silty clay moderate coarse / thick subangular blocky ; firm slightly sticky slightly plastic ; common clay cutans; distinct sharp (< 0.5 mm) yellowish brown fine (2-6 mm) mottles; very few pores; very few very fine roots; vughs very fine (< 0.5 mm) pans; few termite or ant channels and nests ; non-calcareous (0%) 4.5 ; gradual (5-15 cm) smooth; nearly plane surface boundary to
Bt1 56-110 cm	strong brown(7.5YR 5/8, moist) ; clay weak coarse / thick subangular blocky ; firm slightly sticky slightly plastic ; common clay cutans; few (2-5%) distinct clear (0.5-2 mm) yellowish red few (2-5%) distinct clear (0.5-2 mm) yellow fine (2-6 mm) fine (2-6 mm) mottles; very few pores; very few very fine roots; few (2-5%) fresh or slightly weathered ; vughs very fine (< 0.5 mm) pans; few termite or ant channels and nests ; non-calcareous (0%) 4.5 ; gradual (5-15 cm) smooth; nearly plane surface boundary to
Bt2 110-150 cm	clay coarse / thick subangular blocky ; firm sticky slightly plastic ; common clay cutans; abundant (> 40%) prominent sharp (< 0.5 mm) brownish yellow abundant (> 40%) prominent sharp (< 0.5 mm) red mottles; very few pores; very few very fine roots; few (2-5%) fresh or slightly weathered ; vughs very fine (< 0.5 mm) pans; few termite or ant channels and nests ; non-calcareous (0%) 4.5 ;
Bt3 150-200 cm	common clay cutans; non-calcareous (0%) ;

Major crops	rubber
Land improvements ; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	burning
Land use or vegetation in the immediate vicinity of the site	shifting cultivation
Remarks on Land Use / Vegetation	> 50 year old jungle rubbex for cleared for slash and burn farming first and then when abandoned for upland ricve cultivation it was planted with rubber
Major vegetation type; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	evergreen broad-leaved forest

Altitude	83m
Hierarchy of major landforms	plain
Physiographic Unit	middle slope (back slope) in undulating to mountainous terrain
Physiograpy description	Hilly plain in tributuary of Kapuas Hulu river, Sungai Lebojan
Slope	05%
Slope forms and surface pathways	straight convex
Slope gradient %	3.0%

Drainage class ; FAO (2006) - Guidelines for soil description	moderately well drained
Depth to groundwater table	> 170cm

Surface stoniness class (FAO (2006) - Guidelines for soil description)	none (0%)
Recommended classification of rock outcrops - distance between rock outcrops	none (0%)
Classification of salt characteristics - cover	none (0-2%)

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Reference soil Indonesia 51: Acrisol

Characteristics

Reference soil ID051: Acrisol