All-solid-state multimodal probe based on ISFET electrochemical microsensors for in-situ soil nutrients monitoring in agriculture

Abstract : We report the design of a silicon chip dedicated to the in-situ monitoring of soil nitrogen cycle in wheat crop. Our study shows that ion-sensitive field effect transistor (ISFET) microsensors are suitable for quick on-site or long-term analysis of nutrients measured directly in soil as opposed to soil extracts analysis. Our pH-ISFET recorded soil pH for six months with results in good accordance with standard sampling method and without any loss of sensitivity. The adaptation of pH-ISFET in pNO3 and pNH4-ISFET allowed, for the first time, the in-situ measurements of natural variations of soil nitrogen contents caused by microorganisms' activity.
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Matthieu Joly, Laurent Mazenq, Maurane Marlet, Pierre Temple-Boyer, Céline Durieu, et al.. All-solid-state multimodal probe based on ISFET electrochemical microsensors for in-situ soil nutrients monitoring in agriculture. 19th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers 2017), Jun 2017, Kaohsiung, Taiwan. 4p., ⟨10.1109/TRANSDUCERS.2017.7994028⟩. ⟨hal-01871403⟩

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