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Vol. 14-1, Special Issue, March 2012, pp.160-173

 

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An Integrated Multimodal Sensor for the On-site Monitoring of the Water Content and Nutrient Concentration of Soil by Measuring the Phase and Electrical Conductivity

 

1 Masato FUTAGAWA, 1 MD. Iqramul HUSSAIN, 1Keita KAMADO, 1 Fumihiro DASAI, 1 Makoto ISHIDA, 1, 2 Kazuaki SAWADA

1 Toyohashi University of Technology,

1-1, Hibarigaoka, Tempaku-cho, Toyohashi, 441-8580Aichi, Japan

Tel.: +81-532-44-6974, fax: +81-532-81-5115

2 Japan Science and Technology Agency, CREST,

4-1-8, Ichimoto-cho, Kawaguchi, 332-0012 Saitama, Japan

Tel.: +81-48-226-5601, fax: +81-48-226-5651

E-mail: futagawa@gcoe.tut.ac.jp

 

 

Received: 15 November 2011   /Accepted: 20 December 2011   /Published: 12 March 2012

Digital Sensors and Sensor Sysstems

 

Abstract: We have fabricated a new multimodal sensor chip which is capable of simultaneous on-site measurements of the water content and nutrient concentration. Until now, in agriculture, water content sensors, such as TDR sensors, have been unable to provide accurate measurements, since these sensors are affected by the nutrient concentration in the soil solution. Therefore, tensiometers have generally been used. However, these are large-scale sensors and are not suitable for the precise measurements required in agriculture. Our proposed sensors are the world’s first to enable independent measurements of the water content and nutrient concentration.

 

Keywords: Water content, Ion density, Phase, Electrical conductivity, On-site monitoring

 

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