Soil moisture sensors for sustainable irrigation: comparison and calibration. (2nd August 2019)

• Record Type: Journal Article
• Authors: Bhatnagar, Vaibhav; Chandra, Ramesh; Prasad, Jagdish
• Is Part Of: International journal of sustainable agricultural management and informatics. Volume 5:Number 1(2019)
• Page Start: 25
• Page End: 36
• Publication Date: 2019-08-02
• Subjects: soil moisture sensor -- irrigation -- calibration -- Yl-69 -- SEN: 0193; Sustainable agriculture -- Management -- Periodicals; Sustainable agriculture -- Data processing -- Periodicals; Agricultural productivity -- Management -- Periodicals; Agricultural productivity -- Data processing -- Periodicals; Agricultural resources -- Data processing -- Periodicals; Agricultural systems -- Management -- Periodicals; Agricultural systems -- Data processing -- Periodicals; 338.1
• Languages: English
• ISSNs: 2054-5819

Abstract

Soil moisture is a vital component for plant growth. There are many electro-chemical low-cost sensors that sense soil moisture with immediate effect rather than other methods such as gravimetric method and others that are expensive as well as consume lot of time. Some of these electro-chemical sensors work on resistivity whereas some sensors work on capacitance. This paper compares the efficiency of resistivity-based sensors with capacitance-based soil moisture sensors so that farmers and experts can use the better one for designing IoT-based irrigation monitoring and controller system. This comparison is performed with 21 samples having different levels of soil water content. The coefficient of variation is calculated to compare the efficiency of both the sensors. After the comparison, calibration has also been performed that depicts the soil moisture content to LCD display and alert the farmer by a buzzer.