The retrieval of geophysical surface properties from radar measurements is relatively straightforward when dealing with near-normal incidence angles and physical surfaces which are relatively smooth. Procedures developed from Hagfors' (1964) scattering model have been used with success to extract various properties (reflectivity, emissivity, slope, etc.) from both Pioneer Venus (Petengill et al., 1988) and Magellan (Tyler et al., 1991; Pettengill et al., 1991) data. However, under certain circumstances, such as physically rough areas or areas of nonhomogeneous composition, Hagfors' model may lead to serious errors in the interpretation of radar and radiometry data. We examine the Magellan-derived surface properties for some areas of below average emissivity in Alpha Regio and in an area to the east of Alpha, Crater Stuart, in order to determine if Hagfors' model is applicable. We also apply methods of classical multiple scattering theory to show enhanced radar backscattering and depressed thermal emission can be expected with a matrix of silicic or mafic rocks embedded in low loss soils. ¿ American Geophysical Union 1992