Coupling soil water processes and nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions

dc.contributor.author Zhu, Qing
dc.contributor.author Castellano, Michael
dc.contributor.author Castellano, Michael
dc.contributor.author Yang, Guishan
dc.contributor.department Agronomy
dc.contributor.other Iowa Nutrient Research Center
dc.date 2018-10-15T23:57:26.000
dc.date.accessioned 2020-06-29T23:05:55Z
dc.date.available 2020-06-29T23:05:55Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.embargo 2019-10-09
dc.date.issued 2018-10-09
dc.description.abstract <p>Interactions among soil water processes and the nitrogen (N) cycle govern biological productivity and environmental outcomes in the earth’s critical zone. Soil water influences the N cycle in two distinct but interactive modes. First, the spatio-temporal variation of soil water content (SWC) controls redox coupling among oxidized and reduced compounds, and thus N mineralization, nitrification, and denitrification. Secondly, subsurface flow controls the movement of water and dissolved N. These two processes interact such that subsurface flow dynamics control the occurrence of relatively static, isolated soil solution environments that span a range of reduced to oxidized conditions. However, the soil water-N cycle is usually treated as a black box. Models focused on N cycling simplify soil water parameters, while models focused on soil water processes simplify N cycling parameters. In addition, effective ways to deal with upscaling are lacking. New techniques will allow comprehensive coupling of the soil water-N cycle across time and space: 1) using hydrogeophysical tools to detect soil water processes and then linked to electrochemical N sensors to reveal the soil N cycle, (2) upscaling small-scale observations and simulations by constructing functions between soil water-N cycle and ancillary soil, topography and vegetation variables in the hydropedological functional units, and (3) integrating soil hydrology models with N cycling models to minimize the over-simplification of N biogeochemistry and soil hydrology mechanisms in these models. These suggestions will enhance our understanding of soil water processes and the N cycle and improve modeling of N losses as important sources of greenhouse gas emission and water pollution.</p>
dc.description.comments <p>This is a manuscript of an article published as Qing Zhu, Michael J. Castellano, Guishan Yang , Coupling soil water processes and nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions. <em>Earth-Science Reviews</em> (2018), doi:<a href="http://dx.doi.org/10.1016/j.earscirev.2018.10.005" target="_blank">10.1016/j.earscirev.2018.10.005</a>. Posted with permission.</p>
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dc.identifier archive/lib.dr.iastate.edu/agron_pubs/529/
dc.identifier.articleid 1578
dc.identifier.contextkey 13081579
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/529
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4893
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/529/2018_Castellano_CouplingSoilManuscript2.pdf|||Sat Jan 15 00:49:16 UTC 2022
dc.source.uri 10.1016/j.earscirev.2018.10.005
dc.subject.disciplines Agriculture
dc.subject.disciplines Biogeochemistry
dc.subject.disciplines Hydrology
dc.subject.disciplines Soil Science
dc.subject.keywords Biogeochemistry
dc.subject.keywords Hydropedology
dc.subject.keywords Nitrogen cycle
dc.subject.keywords Soil Hydrology
dc.title Coupling soil water processes and nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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