Source: https://www.researchgate.net/profile/Didier_Michot/publication/260969513_Mise_en_evidence_par_resistivite_electrique_des_ecoulements_preferentiels_et_de_l'assechement_par_le_mais_d'un_CALCISOL_de_Beauce_irrigueDetermination_of_water_flow_direction_and_corn_roots-induced_dr/links/550144610cf2aee14b58f63e/Mise-en-evidence-par-resistivite-electrique-des-ecoulements-preferentiels-et-de-lassechement-par-le-mais-dun-CALCISOL-de-Beauce-irrigueDetermination-of-water-flow-direction-and-corn-roots-induced-dryi.pdf