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An Arduino-Based Wireless Sensor Network for Soil Moisture Monitoring Using decagon EC-5 Sensors

Open Journal of Soil Science 2017年第10期7卷 288-300页

作者： José O. Payero Ali Mirzakhani Nafchi Rebecca Davis Ahmad Khalilian Edisto Research and Education Center Clemson University Blackville SC USA Department of Agricultural Sciences Clemson University Clemson SC USA

It is undeniable that wireless communication technology has become a very important component of modern society. One aspect of modern society in which application of wireless communication technologies has tremendous potential is in agricultural production. This is especially true in the area of sensing and transmission of relevant farming information such as weather, crop development, water quantity and quality, among others, which would allow farmers to make more accurate and timely farming decisions. A good example would be the application of wireless communication technology to transmit soil moisture data in real time to help farmers make irrigation scheduling decisions. Although many systems are commercially available for soil moisture monitoring, there are still many important factors, such as cost, limiting widespread adoption of this technology among growers. Our objective in this study was, therefore, to develop and test an affordable wireless communication system for monitoring soil moisture using decagon EC-5 sensors. The new system uses Arduino-compatible microcontrollers and communication systems to sample and transmit values from four decagon EC-5 soil moisture sensors. Developing the system required conducting lab calibrations for the EC-5 sensors for the microcontroller operating in either 10-bit or 12-bit analog-to-digital converter (ADC) resolution. The system was successfully tested in the field and reliably collected and transmitted data from a wheat field for more than two months.

关键词： Wireless Communication Soil Moisture Sensors Arduino decagon EC-5 Calibration Irrigation Scheduling Internet-Of-Things

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Response of Two Inexpensive Commercially Produced Soil Moisture Sensors to Changes in Water Content and Soil Texture

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Agricultural Sciences 2015年第10期6卷 1148-1163页

作者： Tyson B. Raper Christopher G. Henry Leo Espinoza Mukhammadzakhrab Ismanov Derrick M. Oosterhuis Department of Plant Sciences University of Tennessee Jackson TN USA Department of Biological and Agricultural Engineering University of Arkansas Stuttgart AR USA Department of Crop Soil and Environmental Sciences University of Arkansas Little Rock AR USA Department of Crop Soil and Environmental Sciences University of Arkansas Fayetteville AR USA

The use of low-cost (<200 USD) soil moisture sensors in crop production systems has the potential to give inference on plant water status and therein drive irrigation events. However, commercially available sensors in... 详细信息

The use of low-cost (decagon 10HS sensors to changes in water content of three dissimilar soils representing common soils in Arkansas row-crop production in nine plastic, 19 L containers under variable environmental conditions. Both sensors were influenced by changes in soil temperature but the magnitudes of the temperature responses were small relative to the moisture responses. Furthermore, the 10HS sensor did not indicate a significant impact of soil texture on estimated volumetric water contents (VWCs). The small sphere of influence on the tested soil moisture parameters coupled with the substantial evaporative demands and temperatures under which this experiment was conducted resulted in suspected non-uniform drying and wetting of the tested containers. Subsequently, non-linear relationships were noted between 10HS estimated VWCs and actual container VWCs and the 200SS predicted lower water potentials than calculated by converting container VWC to soil water potential. The failure of the sensors to accurately predict container VWC highlights the importance of understanding the relatively small quantity of soil on which these sensors rely as well as the potential variability in soil moisture within a very limited volume. The authors caution users of sensors that soil variability may be one of the most important considerations in sensor deployment.

关键词： Soil Moisture Sensor 10HS Watermark 200SS decagon Comparison Soil Texture

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