Reference soil Indonesia 52: Acrisol

ID052

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 ID052: Acrisol

Classification

WRB 2014

Acrisol

Physical characteristics

Water retention characteristics

Depth (cm)	Bulk density kg/dm³	Spec. Surf. Area m²/g	COLE cm/cm	Water disp. clay %	Clay % w/w
1-14	1.04	-	-	-	-
14-40	1.2	-	-	-	-
40-58	1.26	-	-	-	-
58-70	1.36	-	-	-	-
70-92	1.22	-	-	-	-

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
1-14	1.04	-	-	0.62	0.59	-	-	-	0.18
14-40	1.2	-	-	0.57	0.55	-	-	-	0.19
40-58	1.26	-	-	0.6	0.58	-	-	-	0.15
58-70	1.36	-	-	0.54	0.53	-	-	-	0.1
70-92	1.22	-	-	0.54	0.52	-	-	-	0.15

Profile description

Ah 0-1 cm	very dark brown (10YR 2/2, moist); silt loam weak fine/thin granular ; very friable non-sticky non-plastic ; many high (15-40%) pores; many coarse many fine many medium many very fine roots; none (0%) ; channels fine (0.5-2 mm) pans; many ; non-calcareous (0%) ; abrupt (0-2 cm) smooth; nearly plane surface boundary to
A(h);E(l) 1-14 cm	yellowish brown (10YR 5/6, moist); moderate coarse / thick subangular blocky ; very friable slightly sticky slightly plastic ; few (2-5%) faint pale brown fine (2-6 mm) mottles; few medium (5-15%) pores; common fine roots; none (0%) ; channels fine (0.5-2 mm) pans; many ; non-calcareous (0%) 4.5 ; gradual (5-15 cm) smooth; nearly plane surface boundary to
A(h);E(l) 1-14 cm	yellowish brown (10YR 5/6, moist); moderate coarse / thick subangular blocky ; very friable slightly sticky slightly plastic ; few (2-5%) faint pale brown fine (2-6 mm) mottles; few medium (5-15%) pores; common fine roots; none (0%) ; channels fine (0.5-2 mm) pans; many ; non-calcareous (0%) 4.5 ; gradual (5-15 cm) smooth; nearly plane surface boundary to
Btl 14-40 cm	brownish yellow (10YR 6/8, moist); silty clay weak coarse / thick angular blocky ; friable slightly sticky plastic ; continuous common prominent clay and sesquioxides cutans; common (5-15%) distinct pale brown common (5-15%) distinct strong brown fine (2-6 mm) mottles; common low (2-5%) pores; few fine few very fine roots; common red iron–manganese (sesquioxides) both hard and soft nodule ; none (0%) ; planes very coarse (20-50 mm) pans; common ; non-calcareous (0%) 4.5 ; clear (2-5 cm) wavy; pockets less deep than wide boundary to
Btl 14-40 cm	brownish yellow (10YR 6/8, moist); silty clay weak coarse / thick angular blocky ; friable slightly sticky plastic ; continuous common prominent clay and sesquioxides cutans; common (5-15%) distinct pale brown common (5-15%) distinct strong brown fine (2-6 mm) mottles; common low (2-5%) pores; few fine few very fine roots; common red iron–manganese (sesquioxides) both hard and soft nodule ; none (0%) ; planes very coarse (20-50 mm) pans; common ; non-calcareous (0%) 4.5 ; clear (2-5 cm) wavy; pockets less deep than wide boundary to
Bvm 40-58 cm	brownish yellow (10YR 6/8, moist); clay weak coarse / thick angular blocky ; friable sticky plastic ; continuous common prominent clay and sesquioxides cutans; distinct red coarse (> 20 mm) mottles; common low (2-5%) pores; common red iron–manganese (sesquioxides) both hard and soft soft concretion ; none (0%) ; planes very coarse (20-50 mm) pans; common ; non-calcareous (0%) ; clear (2-5 cm) wavy; pockets less deep than wide boundary to
Btv 58-70 cm	brownish yellow (10YR 6/8, moist); clay weak very coarse / thick angular blocky ; friable sticky plastic ; continuous common prominent clay and sesquioxides cutans; few (2-5%) distinct light grey common (5-15%) distinct red fine (2-6 mm) mottles; few low (2-5%) pores; abundant red fine (2–6 mm) iron (ferruginous) hard residual rock fragment ; none (0%) ; channels fine (0.5-2 mm) pans; few ; non-calcareous (0%) ; clear (2-5 cm) wavy; pockets less deep than wide boundary to
CB 70-92 cm	brownish yellow (10YR 6/8, moist); clay weak very coarse / thick angular blocky ; friable slightly sticky slightly plastic ; abundant (> 40%) prominent dark red common (5-15%) prominent white coarse (> 20 mm) mottles; few low (2-5%) pores; abundant yellowish red fine (2–6 mm) clay (argillaceous) both hard and soft residual rock fragment ; many (15-40%) strongly weathered fine artefacts (2-6 mm) ; channels fine (0.5-2 mm) pans; few ; non-calcareous (0%) ; gradual (5-15 cm) irregular; pockets more deep than wide boundary to
C 92-160 cm	red (2.5YR 5/8, moist); strong very coarse / thick platy ; extremely firm non-sticky non-plastic ; prominent coarse (> 20 mm) mottles; very low (< 2%) pores; dominant yellowish red fine (2–6 mm) clay (argillaceous) hard residual rock fragment ; dominant (> 80%) weathered fine artefacts (2-6 mm) ; none ; non-calcareous (0%) ;

Intensity of the soil erosion type	moderate
Soil erosion type	water erosion or deposition
Classification of total area affected by erosion and deposition	25%-50%

Land improvements ; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	burning
Land use or vegetation in the immediate vicinity of the site	natural forest and woodland
Remarks on Land Use / Vegetation	Logged over forest (by chainsaw)
Major vegetation type; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	evergreen broad-leaved forest

Altitude	124m
Hierarchy of major landforms	medium-gradient hill
Slope	08%
Slope forms and surface pathways	straight straight
Slope gradient %	25.0%

Surface stoniness class (FAO (2006) - Guidelines for soil description)	none (0%)
Surface cracking	no cracks observed
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 52: Acrisol

Characteristics

Reference soil ID052: Acrisol

Classification