Brazilian Soil Classification System.

Diagnostic attributes and other attributes; Diagnostic surface horizons and diagnostic subsurface horizons; Categorical levels of the system, nomenclature of classes, bases and criteria, concept and definition of the classes of the 1st categorical level (orders); Classification of soils from the 1st to 4th categorical level; Argissolos; Cambissolos; Chernossolos; Espodossolos; Gleissolos; Latossolos; Luvissolos; Neossolos; Nitossolos; Organossolos; Planossolos; Plintossolos; Vertissolos; Provisional definitions for the 5th and 6th categorical levels (families and series); Distinctive criteria of phases of mapping units.