Reference soil Brazil 10: Ferralsol

BR010

Ferralsols occur in tropical and subtropical regions of the world, mainly on old and stable land surfaces.

Characteristics

Soils having a ferralic horizon (strongly weathered horizon with low-activity clays and very low amounts of weatherable minerals) between 25 and 200 cm from the soil surface. They lack a nitic horizon (a horizon with strongly developed, nut-shaped structure) and do not have a layer which fulfils the requirements of an argic horizon and which has, in the upper 30 cm, 10 percent or more water-dispersible clay.

Distribution of Ferralsols (rough estimation supplied by soilgrids)

 

Reference soil BR010: Ferralsols

Brief field description: Very deep, well drained, red clay soil with a well developed, thick, dark A horizon. The bio-activity is high, which is well visible by bio-channels filled with colour contrasting soil from upper or lower soil layers. *) Brazilian classification: Latossolo Vermelho Amarelo Humico distrofico. Reference soil BR 10 is comparable to soil profile 13 III RCC.

 

Classification

WRB 2006WRB 1998
Umbric- Ferralsol (Humic Alumic Clayic)Alumi-Umbrihumic- Ferralsol
0-64 cmumbric horizon
101-200 cmferralic horizon
64-101 cmcambic horizon
0-64 cmumbric horizon
101-200 cmferralic horizon
64-101 cmcambic horizon
FAO-UNESCO-ISRIC 1988FAO-UNESCO-ISRIC 1974
Ferrali-Humic CambisolHumic Ferralsol
0-64 cmumbric A horizon
- cmcambic B horizon
- cmumbric A horizon
0-64 cmumbric A horizon
64-200 cmoxic B horizon

 

Local classification:Latossolo Vermelho-Amarelo Húmico distrófico