Alternative N Fertilizer Management Strategies Effects on Subsurface Drain Effluent and N Uptake Karlen, Douglas Bjorneberg, David Karlen, Douglas Kanwar, Rameshwar Kanwar, Rameshwar Cambardella, Cynthia
dc.contributor.department Agricultural and Biosystems Engineering 2018-02-14T08:38:20.000 2020-06-29T22:40:19Z 2020-06-29T22:40:19Z 2014-07-20 1998
dc.description.abstract <p>Demonstrating positive environmental benefits of alternative N fertilizer management strategies, without adversely affecting crop growth or yield, was a major goal for the Midwest Management Systems Evaluation Areas (MSEA) program. Our project objectives within this program were to quantify the effects of split- and single-N fertilization strategies on NO3-N concentration and loss in subsurface drain effluent and N accumulation and yield of corn (Zea mays L.) and soybean [Glycine max (L.) Merr.]. The study was conducted on glacial till derived soils in northeast Iowa from 1993 through 1995 using no-till and chisel plow tillage treatments. One-third of the 2,611 effluent samples had NO3-N concentrations greater than 10 mg L–1. Split applying fertilizer N based on pre-sidedress soil nitrate test (PSNT) results significantly increased corn yield for both tillage treatments in the extremely wet 1993 without increasing NO3-N loss in drain effluent. Increased grain yield also resulted in significantly more N removal. When fertilizer N was applied based on the PSNT, no-till and chisel treatments had similar NO3-N losses and concentrations. Average flow-weighted NO3-N concentrations in drain effluent were not increased when larger amounts of fertilizer were applied based on PSNT. However, prior crop and tillage practices and differences in drain flow volume caused significant differences in NO3-N losses and concentrations. These results suggest that spatial differences in flow volume are a major factor determining NO3-N loss in drainage effluent. Significant differences suggest that combining no-tillage practices with split N fertilizer management strategies can have positive environmental benefits without reducing corn yield.</p>
dc.description.comments <p>This article is from A<em>pplied Engineering in Agriculture</em> 14 (1998): 469–473, doi:<a href="" target="_blank">10.13031/2013.19416</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1766
dc.identifier.contextkey 5811321
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/496
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 00:30:39 UTC 2022
dc.source.uri 10.13031/2013.19416
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Subsurface drainage
dc.subject.keywords Pre-sidedress soil nitrate test
dc.subject.keywords No-tillage
dc.subject.keywords Water quality
dc.title Alternative N Fertilizer Management Strategies Effects on Subsurface Drain Effluent and N Uptake
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isAuthorOfPublication 5210e67e-b8da-4e17-be3f-843a09381196
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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