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Performance Assessment of Five Different Soil Moisture Sensors under Irrigated Field Conditions in Oklahoma
Article

Design and Calibration of a Low-Cost SDI-12 Soil Moisture Sensor

DSIE, Technical University of Cartagena, Campus Muralla del Mar s/n, Cartagena E-30202, Spain
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Author to whom correspondence should be addressed.
Received: 21 December 2018 / Revised: 10 January 2019 / Accepted: 23 January 2019 / Published: 25 January 2019
(This article belongs to the Special Issue Sensors and Systems for Smart Agriculture)
Water is the main limiting factor in agricultural production as well as a scarce resource that needs to be optimized. The measurement of soil water with sensors is an efficient way for optimal irrigation management. However, commercial sensors are still too expensive for most farmers. This paper presents the design, development and calibration of a new capacitive low-cost soil moisture sensor that incorporates SDI-12 communication, allowing one to select the calibration equation for different soils. The sensor was calibrated in three different soils and its variability and accuracy were evaluated. Lower but cost-compensated accuracy was observed in comparing it with commercial sensors. Field tests have demonstrated the temperature influence on the sensor and its capability to efficiently detect irrigation and rainfall events. View Full-Text
Keywords: soil moisture; Precision Agriculture; sensor calibration; SDI-12; volumetric water content; capacitive sensor; dielectric measurement; Smart Agriculture soil moisture; Precision Agriculture; sensor calibration; SDI-12; volumetric water content; capacitive sensor; dielectric measurement; Smart Agriculture
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MDPI and ACS Style

González-Teruel, J.D.; Torres-Sánchez, R.; Blaya-Ros, P.J.; Toledo-Moreo, A.B.; Jiménez-Buendía, M.; Soto-Valles, F. Design and Calibration of a Low-Cost SDI-12 Soil Moisture Sensor. Sensors 2019, 19, 491. https://0-doi-org.brum.beds.ac.uk/10.3390/s19030491

AMA Style

González-Teruel JD, Torres-Sánchez R, Blaya-Ros PJ, Toledo-Moreo AB, Jiménez-Buendía M, Soto-Valles F. Design and Calibration of a Low-Cost SDI-12 Soil Moisture Sensor. Sensors. 2019; 19(3):491. https://0-doi-org.brum.beds.ac.uk/10.3390/s19030491

Chicago/Turabian Style

González-Teruel, Juan D., Roque Torres-Sánchez, Pedro J. Blaya-Ros, Ana B. Toledo-Moreo, Manuel Jiménez-Buendía, and Fulgencio Soto-Valles. 2019. "Design and Calibration of a Low-Cost SDI-12 Soil Moisture Sensor" Sensors 19, no. 3: 491. https://0-doi-org.brum.beds.ac.uk/10.3390/s19030491

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