Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

2003

Journal or Book Title

Transactions of the ASAE

Volume

46

Issue

3

First Page

601

Last Page

610

Research Focus Area(s)

Advanced Machinery Engineering and Manufacturing Systems

DOI

10.13031/2013.13588

Abstract

An intact core extraction procedure was tested that might be used in the field for real–time prediction of soil nitrates. An extraction solution was pushed through a soil core held between two filters, and an ion–selective field–effect transistor/flow injection analysis (ISFET/FIA) system was used to sense soil nitrates in real time. Laboratory tests were conducted using four soil types and two levels of nitrate concentration, soil moisture, core density, core length, core diameter, and extraction solution flow rate. The extraction solution flow was sampled at the exit face of the core and routed to the ISFET/FIA system. The ISFET output voltage was sampled at 100 Hz. Results of the test indicate that nitrate extraction of the soil cores was successful, and that data descriptors based on response curve peak and slope of the ISFET nitrate response curve might be used in tandem in a real–time prediction system.

Comments

This article is from Transactions of the ASAE 46 (2003): 601–610, doi:10.13031/2013.13588.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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