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Robust Soil Water Potential Sensor to Optimize Irrigation in Agriculture

Menne, David ORCID iD icon 1; Hübner, Christof; Trebbels, Dennis; Willenbacher, Norbert 1
1 Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), Karlsruher Institut für Technologie (KIT)

Abstract:

Extreme weather phenomena are on the rise due to ongoing climate change. Therefore, the need for irrigation in agriculture will increase, although it is already the largest consumer of water, a valuable resource. Soil moisture sensors can help to use water efficiently and economically. For this reason, we have recently presented a novel soil moisture sensor with a high sensitivity and broad measuring range. This device does not measure the moisture in the soil but the water available to plants, i.e., the soil water potential (SWP). The sensor consists of two highly porous (>69%) ceramic discs with a broad pore size distribution (0.5 to 200 μm) and a new circuit board system using a transmission line within a time-domain transmission (TDT) circuit. This detects the change in the dielectric response of the ceramic discs with changing water uptake. To prove the concept, a large number of field tests were carried out and comparisons were made with commercial soil water potential sensors. The experiments confirm that the sensor signal is correlated to the soil water potential irrespective of soil composition and is thus suitable for the optimization of irrigation systems.


Verlagsausgabe §
DOI: 10.5445/IR/1000148465
Veröffentlicht am 12.07.2022
Originalveröffentlichung
DOI: 10.3390/s22124465
Scopus
Zitationen: 7
Web of Science
Zitationen: 6
Dimensions
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1424-8220
KITopen-ID: 1000148465
Erschienen in Sensors
Verlag MDPI
Band 22
Heft 12
Seiten Art.-Nr.: 4465
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 13.06.2022
Schlagwörter porous matrix sensor; porous ceramic; capillary suspensions; matric potential; soil water potential sensor; time-domain transmission; dielectric measurement
Nachgewiesen in Web of Science
Dimensions
Scopus
Relationen in KITopen
Globale Ziele für nachhaltige Entwicklung Ziel 8 – Menschenwürdige Arbeit und WirtschaftswachstumZiel 13 – Maßnahmen zum Klimaschutz
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