| Parameter | Chemical Parameters | |||
| Methods | Techcnique | |||
| pH, Potentiometer land relation: water (1:1) | NTC 5264 | Potenciometric | ||
| Organic matter | Walkley-Black (Colorimétrico) NTC 5403 | spectrophotometric uv-vis | ||
| Phosphorus Available | Bray II y Kurtz NTC 5350 | Spectrophotometric uv-vis | ||
| Cation Exchange capacity (CEC) | CH3COONH4 1NpH7 NTC 5268 | Volumetric | ||
| Exchange calcium Exchange magnesium Exchange potassium | CH3COONH4 1NpH7 NTC 5349 | Atomic Absorption Spectrophotometry | ||
| Exchange aluminum | Extraction KCL 1N NTC 5263 | Volumetric | ||
| Iron available Manganese available Coper available Zinc available | DTPA-NTC 5526 | Atomic Absorption Spectrophotometry | ||
| Boron available | Hot water NTC 5404 | Spectrophotometric uv-vis | ||
| Total nitrogen | Based on organic matter | Calculation | ||
| Oxidizable organic carbon | Walkley-Black (Colorimetric) NTC5403 | Spectrophotometric uv-vis | ||
| Sulfur available | (Ca(H2PO4)2∙H2O, 008 M NTC 5402 | Spectrophotometric uv-vis | ||
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| Physical parameters | |||
| Texture | By touch |
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| Apparent density | Graduated cylinder |
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