A Real -Time Core Extraction System for Soil Nitrates
Price, Randy Ross
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Permalink
https://hdl.handle.net/2142/86105
Description
Title
A Real -Time Core Extraction System for Soil Nitrates
Author(s)
Price, Randy Ross
Issue Date
2000
Doctoral Committee Chair(s)
Hummel, John W.
Department of Study
Agricultural Engineering
Discipline
Agricultural Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Analytical
Language
eng
Abstract
Many methods exist to predict nitrates, but few have been applied in the field because a real-time extraction system is not available. For this reason, an intact core extraction procedure was tested that might be used in the field for the prediction of soil nitrates. This system used an intact core analysis, where an extracting solution was pushed through a soil core held between two filters, and an ion selective field effect transistor (ISFET) was used to sense soil nitrates in real time. Results of the test indicate that nitrate extraction and washout occurred in the soil cores, and that peak, slope, and cumulative area parameters fitted to the nitrate extraction curve indicate prediction in several seconds.
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