Technical Note: Improved nutrient parameters for modeling diffuse pollution in the tropics

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dc.contributorVirginia Techen
dc.contributor.authorCaiado, M. A. C.en
dc.contributor.authorHeatwole, Conrad D.en
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessed2014-05-29en
dc.date.accessioned2014-05-30T13:13:46Zen
dc.date.available2014-05-30T13:13:46Zen
dc.date.issued2009en
dc.description.abstractNonpoint-source (NPS) or diffuse pollution is a major environmental problem in developed countries, and modeling is an important tool used to evaluate the effectiveness of pollution control measures. The use of NPS models in the tropics usually involves the application of models developed for temperate regions with little, if ally, adaptation to tropical conditions. In this article, we provide a synthesis of the literature values from studies in the tropics, using the GLEAMS model as a reference for the comparable values used in representing temperate conditions. We found that values for the carbon to nitrogen (C:N) ratio, potentially mineralizable nitrogen to total nitrogen ratio (N(0)/N(total)), and base NO(3)-N and NH(4)-N concentrations representative of tropical soils were all different from the values considered appropriate for temperate soils. Relationships between phosphorus pools in tropical soils and in phosphorus sorption parameters likewise were different from those used in GLEAMS, with the exception that the GLEAMS ratio between labile and organic phosphorus in highly weathered soils was found to be comparable to data specific for tropical soils.en
dc.description.sponsorshipCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)en
dc.description.sponsorshipBrazilian Ministry of Educationen
dc.description.sponsorshipSANREM-CRSPen
dc.description.sponsorshipUSDA Cooperative State Research, Education and Extension Service 0199804en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCaiado, M. A. C.; Heatwole, C. D., "Technical Note: Improved nutrient parameters for modeling diffuse pollution in the tropics," Transactions of the ASABE. 52(3): 845-849. (doi: 10.13031/2013.27403) @2009en
dc.identifier.doihttps://doi.org/10.13031/2013.27403en
dc.identifier.issn2151-0032en
dc.identifier.urihttp://hdl.handle.net/10919/48197en
dc.identifier.urlhttp://elibrary.asabe.org/abstract.asp?aid=27403&t=3&dabs=Y&redir=&redirType=en
dc.language.isoenen
dc.publisherAmerican Society of Agricultural and Biological Engineersen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAgroecosystemen
dc.subjectDiffuse pollutionen
dc.subjectGleamsen
dc.subjectModelen
dc.subjectNitrogenen
dc.subjectNonpointen
dc.subjectPollutionen
dc.subjectNutrientsen
dc.subjectPhosphorusen
dc.subjectTropical soilsen
dc.subjectTropicsen
dc.subjectNitrogen mineralizationen
dc.subjectOrganic phosphorusen
dc.subjectSoil-nitrogenen
dc.subjectMaizeen
dc.subjectFieldsen
dc.subjectBare fallowen
dc.subjectNitrateen
dc.subjectSystemsen
dc.subjectDynamicsen
dc.subjectAvailabilityen
dc.subjectFractionsen
dc.subjectAgricultureen
dc.titleTechnical Note: Improved nutrient parameters for modeling diffuse pollution in the tropicsen
dc.title.serialTransactions of the ASABEen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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