Ten-Year Assessment Encourages No-Till for Corn Grain and Stover Harvest

dc.contributor.author Obrycki, John
dc.contributor.author Kovar, John
dc.contributor.author Birrell, Stuart
dc.contributor.author Karlen, Douglas
dc.contributor.author Birrell, Stuart
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2019-12-05T23:13:25.000
dc.date.accessioned 2020-06-29T22:36:53Z
dc.date.available 2020-06-29T22:36:53Z
dc.date.issued 2018-09-20
dc.description.abstract <p>Developing a bio-economy by harvesting crop residues from highly productive corn (<em>Zea mays</em> L.) cropping systems requires science-based management decisions to maintain or enhance grain yield and soil, water, and air resources. Which tillage and stover harvest practices are best for accomplishing these goals? Continuous corn grain yield response to either no-till or chisel plowing with two stover harvest rates (3.4 or 5.1 Mg ha<sup>−1</sup> yr<sup>−1</sup>) was evaluated for 10 yr in central Iowa. Each tillage and stover removal combination was replicated four times. Year-to-year variation affected grain yield more than tillage practice (0.2 Mg ha<sup>−1</sup>) or stover removal (0.1 Mg ha<sup>−1</sup>). Grain yields were not statistically different (<em>p</em> = 0.33) between tillage systems. Including machinery costs made return on investment for chisel plow and no-till equivalent even though no-till yields were numerically lower. Net stover income per megagram was US$2 to $4 greater at the 3.4 versus 5.1 Mg ha<sup>−1</sup> harvest rate because of more efficient harvesting. Among the four practices, no-till with 3.4 Mg ha<sup>−1</sup> stover harvest met multiple goals, including providing acceptable corn grain yields, positive net income per megagram stover, and sufficient residues to protect the soil.</p>
dc.description.comments <p>This article is published as Obrycki, John F., John L. Kovar, Douglas L. Karlen, and Stuart J. Birrell. "Ten-Year Assessment Encourages No-Till for Corn Grain and Stover Harvest." <em>Agricultural & Environmental Letters</em> 3, no. 1 (2018). DOI: <a href="http://dx.doi.org/10.2134/ael2018.06.0034" target="_blank">10.2134/ael2018.06.0034</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/1100/
dc.identifier.articleid 2383
dc.identifier.contextkey 15933610
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/1100
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/802
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/1100/2018_BirrellStuart_TenYear.pdf|||Fri Jan 14 18:40:20 UTC 2022
dc.source.uri 10.2134/ael2018.06.0034
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.title Ten-Year Assessment Encourages No-Till for Corn Grain and Stover Harvest
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 1fd6ff71-dbea-4ada-9267-f9ff2ce1caba
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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