The occurrence of iron-manganese concretions, which vary in diameter and shape, are common in limestone-derived soils from northern Minas Gerais, Brazil. Normally, they tend to increase their size with depth in Cambisols (Inceptisols) and Vertisols, and to remain small in Latosols (Oxisols), where they are smoother and more rounded. Aiming to study them, concretions in the B horizons of Red Latosols, B and BC horizons of Cambisols and C horizons of Vertisols were collected and grouped according to their average […]