1. Université Clermont Auvergne, INRAE, PIAF 63000 Clermont‐Ferrand France
2. Université Bordeaux, INRAE, BIOGECO 33615 Pessac France
3. Synchrotron SOLEIL L'Orme des Merisiers 91190 Gif‐sur‐Yvette cedex France
4. Irrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS, CSIC) Avenida Reina Mercedes, 10 41012 Sevilla Spain
5. Chair of Soil Physics, Bayreuth Center of Ecology and Environmental Research (BayCEER) University of Bayreuth 95440 Bayreuth Germany
6. Department of Land, Air and Water Resources University of California Davis Davis CA 95616 USA