As a water treatment engineer and agronomist specialising in agro-ecology, I have been exploring these two fields of research for over 15 years now. Fascinated by living organisms, by the sensitive dimension of water and mostly by soil fertility, I first set out to understand the workings of the dynamics and memory of water by exploring the many feedbacks from experience and research in this field. Then, wanting to put this knowledge into practice, I have explored practical applications for almost ten years now, particularly in real agricultural contexts.