Even with liberal probability factors, the variations in the soils connected with this study show that specimens from different locations can be distinguished. These calculated probability factors are not applicable to all soil comparisons because it is necessary to establish the concentration ranges for each element from a particular collection area. Their use in this work is only to illustrate the magnitude of the differences in soil composition when a large number of trace elements in specific concentration ranges are employed as points of identification. In an actual case, where a limited number of soil samples are collected, an estimate of the probability of finding two soils from different locations with the same trace elemental composition may be expressed by a simplified relationship: