 This study proposes a new approach for soil moisture mapping at a high spatial resolution in agricultural areas. It uses radar and optical data to estimate soil moisture conditions. The results show that VV polarization provides better accuracy than VH polarization, while the use of both VV and VH provides similar results. Additionally, the use of both polarizations improves the accuracy of the soil moisture estimates when the surface roughness is low, root mean surface height between 1 to 3 centimeters. This approach could be applied to agricultural plots with an NDVI lower than 0.75. This article was authored by Muhammad El-Haj, Nicholas Baghdadi, Merez Zribi, and others.