Long-term Evaluation of Hybrid, Nitrogen, and Potassium Interactions in Continuous Corn

dc.contributor.author Mallarino, Antonio
dc.contributor.author Van Dee, Kevin
dc.contributor.author Oltmans, Ryan
dc.date 2018-02-13T05:35:48.000
dc.date.accessioned 2020-06-30T03:40:52Z
dc.date.available 2020-06-30T03:40:52Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.embargo 2013-02-05
dc.date.issued 2012-01-01
dc.description.abstract <p>A long-term experiment was established in 2009 to study continuous corn responses to potassium (K), nitrogen (N), and hybrid rootworm resistance. Previous research suggested a need for this study. A long-term trial conducted until 2001 at the ISU Northern Research Farm showed that the maximum corn yield level and the N rate that maximized yield was higher when K was optimal or greater. In contrast, the relative yield response to N and the N rate that maximized yield were similar for soil-test phosphorus (P) levels ranging from very low to very high. Other studies have shown that rootworm resistance often increases yield compared with untreated susceptible hybrids. Also, that rootworm resistance does not consistently affect the K rate that maximizes yield, but increases K removal because of the higher yield levels. Therefore, this new study evaluates possible interactions between rootworm resistance and N and K fertilization in corn.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/farms_reports/110/
dc.identifier.articleid 1118
dc.identifier.contextkey 3655986
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath farms_reports/110
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/34848
dc.language.iso en
dc.relation.ispartofseries RFR A1186
dc.source.bitstream archive/lib.dr.iastate.edu/farms_reports/110/LongTermEvaluation.pdf|||Fri Jan 14 18:39:44 UTC 2022
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.keywords RFR A1186
dc.subject.keywords Agronomy
dc.title Long-term Evaluation of Hybrid, Nitrogen, and Potassium Interactions in Continuous Corn
dc.type article
dc.type.genre southeast_research_and_demonstration_farm
dspace.entity.type Publication
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