Abstract: This study was conducted in 2004 to investigate variability and relationship between sodium concentration and erodibility of soils formed over different lithologies. A free survey technique guided by the geological map of the study area was adopted in field sampling, which was followed by routine laboratory analyses. Soil data were subjected to Analysis of Variance (ANOVA) using PROC Mix-model of SAS computer software and correlation analysis. Results showed that soil groups had very low sodium concentration (Exchangeable Sodium Percentage = 0.3-1.4) and this trend was followed by depth distribution (Exchangeable sodium percentage = 0.5-1.2). Soils were highly erodible spatially (Dispersion Ratio = 28.7-83.7%) and with depth (Dispersion ratio = 62.7-65%). While soil dispersability had good relationship with bulk density (R = 0.51; p = 0.05), clay (R = -0.62; p = 0.05) and sand (R = 0.66; p = 0.05), it had non-significant relationship with exchangeable sodium percentage at the same level of probability. It becomes necessary to consider other edaphic and soil-related factors for more reliable assessment of erodibility factors in studied soils.