Nitrogen Rates

dc.contributor.author Sawyer, John
dc.contributor.author Randall, Gyles
dc.contributor.author Sawyer, John
dc.contributor.department Agronomy
dc.date 2018-02-18T08:29:44.000
dc.date.accessioned 2020-06-29T23:02:11Z
dc.date.available 2020-06-29T23:02:11Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.embargo 2017-04-05
dc.date.issued 2008-01-01
dc.description.abstract <p>In most crop rotations that include corn, nitrogen (N) applied to the corn phase is a proven and profitable practice. Corn in some rotations requires little to no N input, with first-year corn following established alfalfa as an example. Corn in other rotations requires substantial N input to meet plant requirements, with continuous corn (CC) typically requiring the greatest input. Other rotations or corn phases will be intermediate in N application requirement. With corn in the two most common crop sequences in the Corn Belt, corn following soybean (SC) and CC, if N is not applied, then yield will suffer. If N is not applied on an on-going basis, then over time corn yield will often average around 50 to 60 bu ac-1 in CC and 100 to 110 bu ac-1 in SC, or less. Consequently, the soil system typically cannot supply the full corn plant N requirement. On average, the yield with no N applied is around 70% in a SC rotation and 55% in CC of the yield obtained at an economic optimum rate. Therefore, supplemental N is needed to reach economic yield potential.</p>
dc.description.comments <p>This is a proceeding from <em>Final Report: </em><em>Gulf Hypoxia and Local Water Quality Concerns Workshop </em>(2008): 59. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_conf/34/
dc.identifier.articleid 1031
dc.identifier.contextkey 9980182
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_conf/34
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4373
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_conf/34/2008_Sawyer_NitrogenRates.pdf|||Fri Jan 14 23:41:01 UTC 2022
dc.subject.disciplines Agricultural Economics
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agronomy and Crop Sciences
dc.title Nitrogen Rates
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 17ce8a78-56b3-47be-abcb-b22968be40f2
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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