Characterization of grumusols in southwestern Rio Grande do Sul III. Morphology and classification

Abstract

A morphological study was conducted on five pedons corresponding to the map units, Bagé, Aceguá, Hulha Negra, São Gabriel and Piraí. The soils were morphological developed as: Aceguá < Hulha Negra < Piraí < São Gabriel < Bagé ----------------- development---------------→ Following the American comprehensive System the Aceguá soil was classified as Vertisol and the rest, as Mollisols. All of the Mollisols pertain to the Subgroup Vertie. The classification was correlated with mineralogy and geomorphology.