The need for information on soil properties and behavior is growing at an unprecedented rate (Brown, 1985). People are requiring more accurate and site-specific information concerning the properties, composition, and variability of soils and to greater depths than are presently being attained in most modern soil surveys (Miller, 1978). Many non-agricultural uses of soils require information from zones deeper than the limits of modern investigations or to depths where insufficient observations have been made to establish reliable standards. To fulfill the needs for deeper, more intense sampling, and quantitative descriptions of soils, different methods of observing soils are required.