Evaluating and predicting agricultural management effects under tile drainage using modified APSIM

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dc.contributor.author Karlen, Douglas
dc.contributor.author Malone, Robert
dc.contributor.author Huth, N.
dc.contributor.author Carberry, P.
dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Ma, Liwang
dc.contributor.author Kaspar, Thomas
dc.contributor.author Karlen, Douglas
dc.contributor.author Meade, T.
dc.contributor.author Kanwar, Ramesh
dc.contributor.author Heilman, Philip
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-14T16:19:14.000
dc.date.accessioned 2020-06-29T22:40:58Z
dc.date.available 2020-06-29T22:40:58Z
dc.date.embargo 2014-09-21
dc.date.issued 2007-07-15
dc.description.abstract <p>An accurate and management sensitive simulation model for tile-drained Midwestern soils is needed to optimize the use of agricultural management practices (e.g., winter cover crops) to reduce nitrate leaching without adversely affecting corn yield. Our objectives were to enhance the Agricultural Production Systems Simulator (APSIM) for tile drainage, test the modified model for several management scenarios, and then predict nitrate leaching with and without winter wheat cover crop. Twelve years of data (1990–2001) from northeast Iowa were used for model testing. Management scenarios included continuous corn and corn–soybean rotations with single or split N applications. For 38 of 44 observations, yearly drain flow was simulated within 50 mm of observed for low drainage (< 100 mm) or within 30% of observed for high drain flow. Corn yield was simulated within 1500 kg/ha for 12 of 24 observations. For 30 of 45 observations yearly nitrate-N loss in tile drains was simulated within 10 kg N/ha for low nitrate-N loss (< 20 kg N/ha) or within 30% of observed for high nitrate-N loss. Several of the poor yield and nitrate-N loss predictions appear related to poor N-uptake simulations. The model accurately predicted greater corn yield under split application (140–190 kg N/ha) compared to single 110 kg N/ha application and higher drainage and nitrate-N loss under continuous corn compared to corn/soybean rotations. A winter wheat cover crop was predicted to reduce nitrate-N loss 38% (341 vs. 537 kg N/ha with and without cover) under 41-years of corn-soybean rotations and 150 kg N/ha applied to corn. These results suggest that the modified APSIM model is a promising tool to help estimate the relative effect of alternative management practices under fluctuating high water tables.</p>
dc.description.comments <p>This article is from <em>Geoderma</em> 140 (2007): 310–322, doi:<a href="http://dx.doi.org/10.1016/j.geoderma.2007.04.014" target="_blank">10.1016/j.geoderma.2007.04.014</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/573/
dc.identifier.articleid 1864
dc.identifier.contextkey 6143426
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/573
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1354
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/573/2007_Malone_EvaluatingPredicting.pdf|||Sat Jan 15 00:59:40 UTC 2022
dc.source.uri 10.1016/j.geoderma.2007.04.014
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Soil Science
dc.subject.disciplines Water Resource Management
dc.subject.keywords N loading
dc.subject.keywords Cover crop
dc.subject.keywords Crop rotation
dc.subject.keywords Water quality
dc.subject.keywords Crop production
dc.subject.keywords Modeling
dc.title Evaluating and predicting agricultural management effects under tile drainage using modified APSIM
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication f36d4ee5-a0dc-46fc-9716-9cc7ad1e2871
relation.isAuthorOfPublication 5210e67e-b8da-4e17-be3f-843a09381196
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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