 This research used global navigation satellite system, GNSS, signals to measure soil moisture and vegetation development in a crop field. The experiment lasted several months and covered a range of soil conditions. The results showed that GNSS reflected signals can detect changes in soil moisture and vegetation development. Additionally, a technique was proposed to combine the reflected signals polarization to reduce noise caused by soil roughness. This article was authored by Alejandro Egitto, Marco Capparini, Giulio Ruffini, and others.