Swine Manure & Aqua-ammonia Nitrogen Application Timing on Subsurface Drainage Water

dc.contributor.author Helmers, Matthew
dc.contributor.author Zhou, Xiaobo
dc.contributor.author Helmers, Matthew
dc.contributor.author Pederson, Carl
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T17:58:39.000
dc.date.accessioned 2020-06-29T22:33:52Z
dc.date.available 2020-06-29T22:33:52Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2013
dc.date.embargo 2013-11-21
dc.date.issued 2013-11-07
dc.description.abstract <p>In Iowa and many other Midwestern states, excess water is removed artificially through<a href="http://www.extension.org/pages/27488/preferential-flow-of-manure-in-tile-drainage">subsurface drainage</a> systems. While these drainage systems are vital for crop production, nitrogen (N) added as manure or commercial fertilizer, or derived from soil organic matter, can be carried as nitrate-nitrogen (NO3-N) to downstream water bodies. A five-year, five-replication, field study was conducted in north-central Iowa with the objective to determine the influence of seasonal N application as ammonia or liquid swine manure on flow-weighted NO3-N concentrations and losses in subsurface drainage water and crop yields in a corn-soybean rotation. Four aqua-ammonia N treatments (150 or 225 lb-N/acre applied for corn in late fall or as an early season side-dress) and three manure treatments (200 lb-N/acre for corn in late fall or spring or 150 lb-N/acre in the fall for both corn and soybean) were imposed on subsurface drained, continuous-flow-monitored plots. Four-year average flow-weighted NO3-N concentrations measured in drainage water were ranked: spring aqua-ammonia 225 (23 ppm) = fall manure 150 every year (23 ppm) > fall aqua-ammonia 225 (19ppm) = spring manure 200 (18 ppm) = fall manure 200 (17 ppm) > spring aqua-ammonia 150 (15 ppm) = fall aqua-ammonia 150 (14 ppm). Corn yields were significantly greater (p=0.05) for the spring and fall manure-200 rates than for non-manure treatments. Soybean yields were significantly greater (p=0.05) for the treatments with a spring nitrogen application to the previous corn crop.</p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/374/
dc.identifier.articleid 1376
dc.identifier.contextkey 4845066
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/374
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/399
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/374/0-2013_HelmersMJ_SwineManureAquaAmmonia_Slides.pdf|||Fri Jan 14 23:50:32 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/374/2013_HelmersMJ_SwineManureAquaAmmonia_Paper.pdf|||Fri Jan 14 23:50:33 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Extension and Outreach
dc.supplemental.bitstream 2013_HelmersMJ_SwineManureAquaAmmonia_Slides.pdf
dc.title Swine Manure & Aqua-ammonia Nitrogen Application Timing on Subsurface Drainage Water
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 26a812e6-e6de-44ff-b7ea-d2459ae1903c
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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