2005 Annual Report 4d.Progress report. This CRIS report serves to document research conducted under the Specific Cooperative Agreement #58-5344-9-044 with the University of Arizona Department of Soil, Water and Environmental Science entitled “Remote sensing/modeling approach for farm and range management.” Additional details can be found in the report for the parent CRIS 5342-12660-003-00D, “Soil Erosion Processes, Natural Resource Models and Decision Support Systems.” In 2005, we focused largely on investigation of radar backscatter modeling for retrieving surface soil moisture and soil micro-roughness from satellite radar images. We led a field campaign in North Park, Colorado to acquire and interpret radar imagery for soil moisture mapping in a cold, mesic region. Results from several studies showed that radar backscatter models were unreliable and produced poor estimates of soil moisture with conventional parameterization. However, when models were parameterized (or calibrated) using multiple radar images at different view angles, the results were greatly improved and could be used for most applications.