The Illinois Soil N Test: Should it be used in Iowa?

dc.contributor.author Sawyer, John
dc.contributor.author Tabatabai, Ali
dc.date 2018-02-18T23:55:12.000
dc.date.accessioned 2020-06-30T01:47:13Z
dc.date.available 2020-06-30T01:47:13Z
dc.date.issued 2005-10-10
dc.description.abstract <p>What is the Illinois Soil N Test (ISNT)? The test was developed several years ago at the University of Illinois by researchers in the Department of Natural Resources and Environmental Sciences. It is a laboratory procedure designed to measure N liberated from soil heated for 5 hours with dilute alkali solution (sodium hydroxide). The test does not measure nitrate, but does measure exchangeable ammonium and a fraction of soil organic N. The theory behind the test is to extract a specific component of organic N from soil collected before planting and N application that can reflect the amount of N mineralized in a growing season to plant-available N forms (converted to inorganic ammonium and nitrate). The concept of estimating mineralized soil organic N is not new, as many biological and chemical methods have been proposed for the past 50 years. At best some of those tests predict available soil N in closed systems, such as in pots under greenhouse conditions, and none have been proved useful in predicting plant-available N in open systems such as field conditions. Unfortunately, it is extremely difficult to predict mineralization that might occur in the field with a lab test. This is the reason there has not been a reliable test developed or recommended to date.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/cropnews/2411/
dc.identifier.articleid 3419
dc.identifier.contextkey 10911514
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cropnews/2411
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/18763
dc.language.iso en
dc.relation.ispartofseries Integrated Crop Management News
dc.source.bitstream archive/lib.dr.iastate.edu/cropnews/2411/ICMNews_20051010_08.pdf|||Fri Jan 14 22:52:50 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.title The Illinois Soil N Test: Should it be used in Iowa?
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 17ce8a78-56b3-47be-abcb-b22968be40f2
relation.isSeriesOfPublication 6c8d0b1a-8ab6-4a4b-bfd0-00466ede7d16
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