The vulnerability of a material to erosion. This will vary according to the nature of the material: degree of consolidation, organic content, particle size, hardness, and strength, among others; on the extent and type of ground vegetation; thus on land use. See Darboux and Le Bissonnais (2007) Eur. J. Soil Sci. 58, 5 on measuring soil erodibility. Quantifying soil erodibility is crucial for forecasting dust events (Zender et al. (2003) J. Geophys. Res.-Atmos. 108, 4543).