Reference soil Chile 06: Stagnosol

CL006

Stagnosols are often related to Luvisols and occur for the greater part in humid and perhumid temperate regions in West and Central Europe, North America, Australia and Argentina.

Characteristics

Soils having within 50 cm of the soil surface reducing conditions (soil conditions with low redox potential (negative logarithm of the hydrogen potential (rH) and presence of free iron (Fe2+) on freshly broken surfaces) and in 50% of the layer a stagnic colour pattern (strong mottling of soils in such a pattern that peds surfaces are lighter (at least one Munsell value) and paler (at least one chroma) than ped interiors, which are more reddish and brighter (at least one chroma)). The stagnic color pattern develops under temporarily saturation of a perched water table from surface water, long enough to allow reducing conditions to arise. The topsoil can be bleached and concretions can occur in the subsoil. They develop often in slowly permeable, unconsolidated materials of various origins.

Distribution of Stagnosols (rough estimation supplied by soilgrids)

Reference soil CL006: Stagnosol

Classification

WRB 2014
Stagnosol

Local classification:	Coarseloamy, mixed, semiactive, thermic Vitrandic Durixerolls

Location:

German Greve Silva Experimental Station (University of Chile).Approximately 8 Km west north west of Maipú town, Chile. North side of Camino a Rinconada, south side of inigation channel.

Physical

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
0-7	-	2	12.2	22.1	24.9	12.1	73.3	9	7.4	16.4	10.3
7-22	-	2.3	4.3	12.1	28.2	20.7	67.6	11.5	6.5	18	14.4
22-50	-	3.4	5.8	13.5	27.7	20.9	71.3	6.2	7.8	14	14.7
50-80	-	6.3	30.4	27.7	16.5	7.4	88.3	6	2.9	8.9	2.8
80-114	-	0.7	9.7	24	28.2	12	74.6	8.4	5.7	14.1	11.3
114-130	-	0.9	11.3	24.7	25.2	12.5	74.6	8.1	6.2	14.3	11.1
130-150	-	0.9	9.8	22.8	25.6	14.9	74	9.4	7.1	16.5	9.5

Depth (cm)	coarse_clay %	coarse_fragments1 % w/w	coarse_fragments2 % w/w	coarse_fragments3 % w/w	coarse_fragments4 % w/w	coarse_fragments %
0-7	-	-	1	1	2	62
7-22	-	-	1	1	2	48
22-50	-	-	3	1	4	52
50-80	-	-	2	-	2	81
80-114	-	-	1	-	1	63
114-130	-	1	-	-	1	62

Depth (cm)	coarse_clay %	lab_texture	very_coarse_sand %	coarse_sand %	medium_sand %	fine_sand %	very_fine_sand %	total_sand_05_2 %	coarse_silt_02_005 %	fine_silt_002_02 %	total_silt %	fine_clay_2 %	fine_clay_02 %
0-7	-	SL	2.5	13.6	23.3	25.8	15.3	80.5	8.5	6.8	15.3	3.5	-
7-22	-	FSL	2.5	4.5	12.9	31	26.6	77.5	8.3	6.2	14.5	5.3	-
22-50	-	FSL	4.1	7	14.7	31.7	18.9	76.4	7.7	8.1	15.8	4	-
50-80	-	COS	5.4	27.8	26.6	19.4	8.9	88.1	6.9	4.3	11.2	0.4	-
80-114	-	SL	0.8	10.9	26	26.5	13.6	77.8	7.9	6.3	14.2	3.3	-
114-130	-	SL	0.9	12.1	27	24.7	12.5	77.2	7	9.9	16.9	3.1	-

Other physical data

Depth (cm)	Bulk density kg/dm³	Spec. Surf. Area m²/g	COLE cm/cm	Water disp. clay %	Clay % w/w
0-7	1.34	-	-	4.2	10.3
7-22	1.64	-	-	8	14.4
22-50	1.5	-	-	7.8	14.7
50-80	1.54	-	-	0.7	2.8
80-114	1.66	-	-	8	11.3
114-130	1.27	-	-	5.9	11.1
130-150	1.49	-	-	-	9.5

Chemical characteristics:

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
0-7	6.7	5.9	0.34	-	-	0.239	10	-	-	9.8	1.2	1.7	-	12.7
7-22	7.7	7.1	2.59	1	-	0.092	-	-	-	11	2.2	0.6	3.2	17
22-50	7.9	7.1	0.58	-	-	0.057	1	-	-	10.6	1.9	0.5	1.5	14.5
50-80	8	6.6	0.06	-	-	0.04	-	-	-	3.4	0.4	0.2	0.1	4.1
80-114	7.3	5.6	0.07	-	-	0.036	4	-	-	6.9	1.1	0.6	-	8.6
114-130	6.8	5.6	0.1	-	-	0.061	4	-	-	5.9	0.9	1	-	7.8
130-150	6.8	5.6	0.15	-	-	0.091	-	-	-	5.2	0.9	1.8	-	7.9

Depth (cm)	nitrite mmol(c)/l	nitrate mmol(c)/l	carbonate2 mmol(c)/l	magnesium2 mmol(c)/l	calcium2 mmol(c)/l	sodium3 mmol(c)/l	sulfate mmol(c)/l	bicarbonate mmol(c)/l	potassium2 mmol(c)/l	phosphate mmol(c)/l	chloride mmol(c)/l
0-7	-	-	-	1	3.9	0.6	0.6	4.9	2	0.5	1
7-22	-	31	-	8.5	35.8	26.1	25.7	1.5	0.4	-	12.6
22-50	0.1	2.6	-	1.7	6.3	8.2	5.7	4.5	0.2	-	4.8

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 %
0-7	100	11	-	-	-	-	-
7-22	100	8.4	-	-	-	-	16
22-50	100	10.5	-	-	-	-	10
50-80	100	3.1	-	-	-	-	2
80-114	100	7.3	-	-	-	-	-
114-130	100	7.3	-	-	-	-	-
130-150	100	7.3	-	-	-	-	-

Depth (cm)	pH NaF	P Retention %	ODOE	Al o % w/w	Si o % w/w	Fe d % w/w	Al d % w/w	Fe p % w/w	Al p % w/w	C p % w/w	Fe o % w/w
0-7	8.4	8	0.08	0.05	0.04	0.7	-	0.1	-	-	0.38
7-22	9.1	7	-	0.04	0.01	0.2	-	-	-	-	0.02
22-50	9.3	8	0.01	0.06	0.02	0.3	-	-	-	-	0.04
50-80	8.6	4	0.04	0.02	0.02	0.3	-	-	-	-	0.31
80-114	9	10	0.06	0.06	0.06	0.9	-	0.1	-	-	0.32
114-130	8.8	4	0.08	0.07	0.08	0.9	-	-	-	-	0.48
130-150	8.9	7	0.11	0.07	0.07	1	-	-	-	-	0.62

Depth (cm)	CaSO4.2H2O %	P Bray mg/kg	P Olsen mg/kg	pH CaCl2	clay_noncarbonate % w/w	clay_carbonate % w/w	phosphorus4 mg/kg	phosphorus1 mg/kg	total_sulfur % w/w
0-7	-	-	-	6.4	-	-	328.5	-	0.04
7-22	-	-	-	7.6	-	-	12.4	-	0.04
22-50	-	-	-	7.7	-	-	-	-	0.02
50-80	-	-	-	7.3	-	-	100.8	-	0.01
80-114	-	-	-	6.5	-	-	139.5	-	0.01
114-130	-	-	-	6.3	-	-	238.5	-	0.01
130-150	-	-	-	6.1	-	-	339.8	-	0.02

Depth (cm)	nitrite mmol(c)/l	nitrate mmol(c)/l	carbonate2 mmol(c)/l	magnesium2 mmol(c)/l	calcium2 mmol(c)/l	sodium3 mmol(c)/l	sulfate mmol(c)/l	bicarbonate mmol(c)/l	potassium2 mmol(c)/l	phosphate mmol(c)/l	chloride mmol(c)/l
0-7	-	-	-	1	3.9	0.6	0.6	4.9	2	0.5	1
7-22	-	31	-	8.5	35.8	26.1	25.7	1.5	0.4	-	12.6
22-50	0.1	2.6	-	1.7	6.3	8.2	5.7	4.5	0.2	-	4.8

Soluble salts:

Depth (cm)	Sodium ads. ratio	pH e	EC e dS/m	EC 1 : 5 dS/m
0-7	-	-	0.74	-
7-22	-	-	5.73	-
22-50	-	-	1.46	-

Depth (cm)	nitrite mmol(c)/l	nitrate mmol(c)/l	carbonate2 mmol(c)/l	magnesium2 mmol(c)/l	calcium2 mmol(c)/l	sodium3 mmol(c)/l	sulfate mmol(c)/l	bicarbonate mmol(c)/l	potassium2 mmol(c)/l	phosphate mmol(c)/l	chloride mmol(c)/l
0-7	-	-	-	1	3.9	0.6	0.6	4.9	2	0.5	1
7-22	-	31	-	8.5	35.8	26.1	25.7	1.5	0.4	-	12.6
22-50	0.1	2.6	-	1.7	6.3	8.2	5.7	4.5	0.2	-	4.8

Profile description

A1 0-7 cm	(dark) brown(10YR 4/3, moist) ; moderate medium subangular blocky ; soft non-sticky non-plastic ; many pores; many fine many very fine roots; fine (0.5-2 mm) pans; clear (2-5 cm) smooth; nearly plane surface boundary to
A2 7-22 cm	brown(10YR 5/3, moist) ; moderate medium angular blocky ; soft sticky plastic ; few fine roots; gradual (5-15 cm) smooth; nearly plane surface boundary to
B1 22-50 cm	(dark) brown(10YR 4/3, moist) ; sandy loam weak fine/thin angular blocky ; soft sticky plastic ; few fine roots; gradual (5-15 cm) smooth; nearly plane surface boundary to
B2 50-80 cm	brown(10YR 5/3, moist) ; sandy loam moderate medium subangular blocky ; soft sticky plastic ; few fine few very fine roots; abrupt (0-2 cm) wavy; pockets less deep than wide boundary to
C1 80-114 cm	(2.5Y 4/1, moist) ; very coarse and coarse sand massive ; hard sticky plastic ; abrupt (0-2 cm) smooth; nearly plane surface boundary to
C2 114-130 cm	(7.5YR 6/3, moist) ; very coarse and coarse sand massive ; very hard non-sticky non-plastic ; abrupt (0-2 cm) smooth; nearly plane surface boundary to
Cqm 130-150 cm	very pale brown(10YR 7/3, moist) ;

Altitude	458m
Slope	05%
Slope gradient %	2.5%

Drainage class ; FAO (2006) - Guidelines for soil description	well drained
Drainage class - intergrade; FAO (2006) - Guidelines for soil description	well drained

You are here

Reference soil Chile 06: Stagnosol

Characteristics

Reference soil CL006: Stagnosol

Classification