Real-time multi ISFET/FIA soil analysis system with automatic sample extraction

dc.contributor.author Birrell, Stuart
dc.contributor.author Hummel, John
dc.contributor.author Birrell, Stuart
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-14T16:15:04.000
dc.date.accessioned 2020-06-29T22:40:49Z
dc.date.available 2020-06-29T22:40:49Z
dc.date.embargo 2014-09-19
dc.date.issued 2001-07-01
dc.description.abstract <p>Successful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with flow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/ FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (<em>r</em><sup>2</sup>>0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary before commercialization can be realized. However, the concept of using ISFETs for the real-time analysis of soil nitrates is sound. The rapid response and low sample volumes required by the multi-sensor ISFET/FIA system make it a viable candidate for use in real-time soil nutrient sensing.</p>
dc.description.comments <p>This article is from <em>Computers and Electronics in Agriculture</em> 32 (2001): 45–67, doi:<a href="http://dx.doi.org/10.1016/S0168-1699(01)00159-4" target="_blank">10.1016/S0168-1699(01)00159-4</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/559/
dc.identifier.articleid 1843
dc.identifier.contextkey 6141507
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/559
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1338
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/559/2001_Birrell_RealTime.pdf|||Sat Jan 15 00:56:19 UTC 2022
dc.source.uri 10.1016/S0168-1699(01)00159-4
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Soil Sensor
dc.subject.keywords Nitrates
dc.subject.keywords ISFETs
dc.subject.keywords Flow injection analysis
dc.title Real-time multi ISFET/FIA soil analysis system with automatic sample extraction
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 1fd6ff71-dbea-4ada-9267-f9ff2ce1caba
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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