A Real -Time Core Extraction System for Soil Nitrates

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agricultural Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Price, Randy Ross

Contributors dc:contributor

• Hummel, John W.

• Chemistry, Analytical

Language dc:language

eng

Identifier

(MiAaPQ)AAI9971165

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/86105