Agronomic Comparison of Anhydrous Ammonia Applied with a High Speed-Low Draft Opener and Conventional Knife Injection in Corn

dc.contributor.author Woli, Krishna
dc.contributor.author Fernández, Fabián
dc.contributor.author Barker, Daniel
dc.contributor.author Hanna, H. Mark
dc.contributor.author Stamper, Joshua
dc.contributor.author Mengel, David
dc.contributor.author Sawyer, John
dc.contributor.author Hanna, Mark
dc.contributor.department Agronomy
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-18T06:20:56.000
dc.date.accessioned 2020-06-29T23:02:40Z
dc.date.available 2020-06-29T23:02:40Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.issued 2014-02-28
dc.description.abstract <p>Anhydrous ammonia (AA) is an important N fertilizer in the U.S., and with large farming operations rapid application is needed. This study evaluated the impact of AA application timing and N rates when applied with a high speed low draft (HSLD) or a conventional till knife (CTKI) on corn (Zea Mays L.) production in no-tillage fields. The study was conducted at sites located in Illinois, Iowa, and Kansas from 2007 to 2009. The experimental design was a split-plot factorial arrangement of application method, timing (fall; spring preplant, SP; and sidedress, SD), and five N rates. Fall AA application was least efficient (mean 55 kg N ha–1 higher optimum N and 2% lower grain yield, GY), with SP and SD equivalent. The HSLD was comparable to the CTKI with most applications, except when high N rates (180 and 225 kg N ha-1) were applied SP. For these treatments AA injury reduced plant population (PP), early season growth, canopy NDVI, and GY. Seedling injury did not occur with any N rate or timing with the CTKI. Shallow AA placement at high speed with the HSLD can provide a viable alternative to traditional deeper knife injection when conditions are suitable for AA application and positioning avoids corn seedling injury. Anhydrous ammonia application with the HSLD, however, should be avoided where high SP AA rates may be placed directly under future corn rows.</p>
dc.description.comments <p>This is a manuscript of an article from <em>Agronomy Journal </em>106 (2014): 881, doi: <a href="http://dx.doi.org/10.2134/agronj13.0441" target="_blank">10.2134/agronj13.0441</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/116/
dc.identifier.articleid 1120
dc.identifier.contextkey 9907843
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/116
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4440
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/116/ms2014_Sawyer_AgronomicComparison.pdf|||Fri Jan 14 18:54:04 UTC 2022
dc.source.uri 10.2134/agronj13.0441
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.title Agronomic Comparison of Anhydrous Ammonia Applied with a High Speed-Low Draft Opener and Conventional Knife Injection in Corn
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 9c31ee99-d456-4aef-8e50-5c46e4e21cd7
relation.isAuthorOfPublication 732298de-2ea9-4502-8fcf-3418080016e1
relation.isAuthorOfPublication 17ce8a78-56b3-47be-abcb-b22968be40f2
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
File
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
ms2014_Sawyer_AgronomicComparison.pdf
Size:
1.03 MB
Format:
Adobe Portable Document Format
Description:
Collections