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2015-??-??
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2015-??-??
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2015-??-??
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Original Soil Parameter | Unit of measurement | Description | Analytical method | Reference Standard | LOD (limit of detection) |
---|---|---|---|---|---|
Coarse | % | Sieving to separate coarse fragments (2-60 mm) from fine earth fraction | Sieving to separate coarse fragments (2-60 mm) from fine earth fraction | ISO 11464:2006 | - |
Clay | % | Laser diffraction | Sieving and sedimentation method (in 2009 and 2012) Laser diffraction (in 2015 only) | ISO 11277:1998 ; ISO 13320:2009 | - |
Sand | % | Laser diffraction | Sieving and sedimentation method (in 2009 and 2012) Laser diffraction (in 2015 only) | ISO 11277:1998 ; ISO 13320:2009 | - |
Silt | % | Laser diffraction | Sieving and sedimentation method (in 2009 and 2012) Laser diffraction (in 2015 only) | ISO 11277:1998 ; ISO 13320:2009 | - |
pH_CaCL2 | - | Glass electrode in a 1:5 (V/V) suspension of soil in CaCl2 | Glass electrode in a 1:5 (V/V) suspension of soil in H20 and CaCl2 | ISO 10390:2005 | 2−10 |
pH_H2O | - | Glass electrode in a 1:5 (V/V) suspension of soil in H2O | Glass electrode in a 1:5 (V/V) suspension of soil in H20 and CaCl2 | ISO 10390:2005 | 2−10 |
EC | mS/m | Metal electrodes in aqueous extract of soil | Metal electrodes in aqueous extract of soil | ISO 11265:1994 | 0.1 |
OC | g/kg | Dry combustion (elementary analysis) | Dry combustion (elementary analysis) | ISO 10694:1995 | 2.0 |
CaCO3 | g/kg | Volumetric Method | Volumetric method | ISO 10693:1995 | 1.0 |
P_extractable | mg/kg | Spectrometric determination of P soluble in sodium hydrogen CaCO3 solution | Spectrometric determination of P soluble in sodium hydrogen CaCO3 solution | ISO 11263:1194 | 10.0 |
N_total | g/kg | Modified Kjeldahl method | Modified Kjeldahl method | ISO 11261:1995 | 0.2 |
K_extractable | mg/kg | Atomic absorption spectrometry after extraction with Na4OAc | Atomic absorption spectrometry after extraction with NH4OAc | USDA−NRCS, 2004 | 10.0 |
CEC | mg/kg | Using barium chloride solution to saturate samples and extract cations | Using barium chloride solution to saturate samples and extract cations | ISO 11260:1994 | 2.0 |