Mineralogical analysis.- Water Content and Loss on Ignition.- Particle Size Analysis.- Fractionation of the Colloidal Systems.- Mineralogical Characterisations by X-Ray Diffractometry.- Mineralogical Analysis by Infra-Red Spectrometry.- Mineralogical Separation by Selective Dissolution.- Thermal Analysis.- Microscopic Analysis.- Organic analysis.- Physical Fractionation of Organic Matter.- Organic and Total C, N (H, O, S) Analysis.- Quantification of Humic Compounds.- Characterization of Humic Compounds.- Measurement of Non-Humic Molecules.- Organic Forms of Nitrogen, Mineralizable Nitrogen (and Carbon).- Inorganic analysis.- pH Measurement.- Redox Potential.- Carbonates.- Soluble Salts.- Exchange Complex.- Isoelectric and Zero Charge Points.- Permanent and Variable Charges.- Exchangeable Cations.- Exchangeable Acidity.- Lime Requirement.- Exchange Selectivity, Cation Exchange Isotherm.- Cation Exchange Capacity.- Anion Exchange Capacity.- Inorganic Forms of Nitrogen.- Phosphorus.- Sulphur.- Analysis of Extractable and Total Elements.