Authors have shown moisture content to be the most dominant factor affecting soil strength indices [25] and have developed predictive empirical relationships. Regression equations for the influence of water content on all three indices were significant (Table 3), with r2 values of 19.5%, 34.6% and 47.4% for bulk density,penetration resistance and surface hardness respectively. The data implies that moisture content explained the greater part of the variability associated with surface hardness. The implication of this resides in the use of moisture content as a determinant of soil strength and compaction. When used with surface hardness may prove to be a strong indicator of soil strength.