This week began the installation of aluminum tubes at a depth of 125cm for measuring soil moisture content with a neutron probe. These tubes are installed near the pits already equipped with probes recording water content (CS616 – Campbell Scientific). The measurements of the neutron probe, considered as reference measurements, will be used to validate the calibration equations of the CS616 probes. This work will be carried out during an internship in spring 2017 in collaboration with Cyril Dejean of the Irstea G-EAU research unit in Montpellier. This internship is supported by Irstea’s measurement network.