Multisensor capacitance probes for simultaneously monitoring rice field soil-water- crop-ambient conditions

Brinkhoff, James, Hornbuckle, John and Dowling, Thomas 2017, Multisensor capacitance probes for simultaneously monitoring rice field soil-water- crop-ambient conditions, Sensors, vol. 18, no. 1, Special issue: Sensors in Agriculture, pp. 1-14, doi: 10.3390/s18010053.

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Title Multisensor capacitance probes for simultaneously monitoring rice field soil-water- crop-ambient conditions
Author(s) Brinkhoff, JamesORCID iD for Brinkhoff, James
Hornbuckle, JohnORCID iD for Hornbuckle, John
Dowling, Thomas
Journal name Sensors
Volume number 18
Issue number 1
Season Special issue: Sensors in Agriculture
Article ID 53
Start page 1
End page 14
Total pages 14
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2017-12-26
ISSN 1424-8220
Keyword(s) irrigation
rice field monitoring
soil moisture sensors
temperature sensors
water depth sensors
Science & Technology
Physical Sciences
Chemistry, Analytical
Instruments & Instrumentation
Summary Multisensor capacitance probes (MCPs) have traditionally been used for soil moisture monitoring and irrigation scheduling. This paper presents a new application of these probes, namely the simultaneous monitoring of ponded water level, soil moisture, and temperature profile, conditions which are particularly important for rice crops in temperate growing regions and for rice grown with prolonged periods of drying. WiFi-based loggers are used to concurrently collect the data from the MCPs and ultrasonic distance sensors (giving an independent reading of water depth). Models are fit to MCP water depth vs volumetric water content (VWC) characteristics from laboratory measurements, variability from probe-to-probe is assessed, and the methodology is verified using measurements from a rice field throughout a growing season. The root-mean-squared error of the water depth calculated from MCP VWC over the rice growing season was 6.6 mm. MCPs are used to simultaneously monitor ponded water depth, soil moisture content when ponded water is drained, and temperatures in root, water, crop and ambient zones. The insulation effect of ponded water against cold-temperature effects is demonstrated with low and high water levels. The developed approach offers advantages in gaining the full soil-plant-atmosphere continuum in a single robust sensor.
Language eng
DOI 10.3390/s18010053
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, by the authors.
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Document type: Journal Article
Collection: School of Life and Environmental Sciences
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