Corn Nitrogen Fertilization Requirement and Corn–Soybean Productivity with a Rye Cover Crop Sawyer, John Pantoja, Jose Woli, Krishna Sawyer, John Barker, Daniel Barker, Daniel
dc.contributor.department Agronomy 2018-02-18T06:20:21.000 2020-06-29T23:02:42Z 2020-06-29T23:02:42Z Thu Jan 01 00:00:00 UTC 2015 2015-10-02
dc.description.abstract <p>Winter rye (<em>Secale cereale</em> L.) cover crop (RCC) has potential to reduce NO<sub>3</sub>–N loss from corn (<em>Zea mays</em> L.) and soybean [<em>Glycine max</em> (L.) Merr.] fields. However, RCC effects on annual crop productivity and corn optimal N fertilization requirement are unclear. The objectives were to evaluate corn and soybean yield response to RCC and corn optimal N rate. Treatments were no-RCC and RCC with six fertilizer N rates (0–225 kg N ha<sup>-1</sup>) applied to corn in a no-till corn–soybean (CS) rotation at four Iowa sites in 2009 through 2011. The RCC biomass and N uptake was low, with a maximum of 1280 kg dry matter (DM) ha<sup>-1</sup> and 26 kg N ha<sup>-1</sup>, respectively. In the no-N control, the RCC reduced soil profile NO<sub>3</sub>–N by 15 kg N ha<sup>-1</sup> only at time of RCC control before corn planting. Corn canopy sensing, plant height, and plant population indicated more N stress, reduced plant stand, and slower growth with RCC. The RCC reduced corn grain yield by 6% at the economic optimum N rate (EONR). The EONR was the same with no-RCC and RCC, but plant N uptake efficiency (PUE) was reduced at low N rates with RCC, but not above the EONR. Soybean yield was not affected by RCC. Results indicate N fertilization rate should be the same with or without RCC. Improvement in RCC systems and management could make RCC a more viable practice within no-till corn and soybean production.</p>
dc.description.comments <p>This article is from <em>Soil Science Society of America Journal </em>79 (2015): 1482, doi: <a href="" target="_blank">10.2136/sssaj2015.02.0084</a>. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1116
dc.identifier.contextkey 9903522
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/120
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 19:10:25 UTC 2022
dc.source.uri 10.2136/sssaj2015.02.0084
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Plant Pathology
dc.title Corn Nitrogen Fertilization Requirement and Corn–Soybean Productivity with a Rye Cover Crop
dc.type article
dc.type.genre article
dspace.entity.type Publication
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