Soil structure governs water and air flow but also affects soil stiffness and strength. Despite their importance, quantitative relations between structure, mechanical and hydraulic properties of soil are still poorly understood. This study presents first results from numerical compression experiments on structured soil and the impact deformation on soil hydraulic properties. Finite element meshes were created based on X-ray microtomography images of structured soil. Soil mechanical and hydraulic simulations were run using the Finite Element package COMSOL Multiphysics®.