Non-destructive image analysis of soil surface porosity and bulk density dynamics

► Gamma-ray tomography allowed non-destructive analysis of soil bulk density and porosity changes. ► Soil porosity increased about 10% with the wetting and drying cycles. ► Soil bulk density in the compacted region decreased about 6% with the wetting and drying cycles. ► Detailed bulk density and porosity analysis changes were obtained for layers of 1.17 mm.