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oai:www.ideals.illinois.edu:2142/86105 2023-07-11 col_2142_5131 col_2142_14847 com_2142_5130 com_2142_683 com_2142_397

Hummel, John W. Price, Randy Ross 2015-09-28T14:54:00Z 2015-09-28T14:54:00Z 10000-01-01 2000 2000 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. Made available in DSpace on 2015-09-28T14:54:00Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9971165.pdf: 8237701 bytes, checksum: d34ba5156d81a7c4b2855289e1d41017 (MD5) Previous issue date: 2000 Embargo set by: Seth Robbins for item 87386 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 198 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000. http://hdl.handle.net/2142/86105 (MiAaPQ)AAI9971165 eng Chemistry, Analytical A Real -Time Core Extraction System for Soil Nitrates text Agricultural Engineering Agricultural Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.