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dc.contributor.authorSinaj, S.en
dc.contributor.authorStamm, C.en
dc.contributor.authorToor, G.en
dc.contributor.authorCondron, Leo M.en
dc.contributor.authorHendry, Trevor B.en
dc.contributor.authorDi, Hong J.en
dc.contributor.authorCameron, Keith C.en
dc.contributor.authorFrossard, E.en
dc.date.accessioned2008-04-09T01:32:03Z
dc.date.issued2002en
dc.identifier.citationSinaj, S., Stamm, C., Toor, G. S., Condron, L. M., Hendry, T., Di, H. J., et al. (2002). Phosphorus exchangeability and leaching losses from two grassland soils. Journal of Environmental Quality, 31(1), 319–330.en
dc.identifier.issn0047-2425en
dc.identifier.urihttps://hdl.handle.net/10182/430
dc.description.abstractAlthough phosphate phosphorus (P) is strongly sorbed in many soils, it may be quickly transported through the soil by preferential flow. Under flood irrigation, preferential flow is especially pronounced and associated solute losses may be important. Phosphorus losses induced by flood irrigation were investigated in a lysimeter study. Detailed soil chemical analyses revealed that P was very mobile in the topsoil, but the higher P-fixing capacity of the subsoil appeared to restrict P mobility. Application of a dye tracer enabled preferential flow pathways to be identified. Soil sampling according to dye staining patterns revealed that exchangeable P was significantly greater in preferential flow areas as compared with the unstained soil matrix. This could be partly attributed to the accumulation of organic carbon and P, together with enhanced leaching of Al- and Fe-oxides in the preferential flow areas, which resulted in reduced P sorption. The irrigation water caused a rapid hydrologic response by displacement of resident water from the subsoil. Despite the occurrence of preferential flow, most of the outflowing water was resident soil water and very low in P. In these soils the occurrence of preferential flow per se is not sufficient to cause large P losses even if the topsoil is rich in P. It appears that the P was retained in lower parts of the soil profile characterized by a very high P-fixing capacity. This study demonstrates the risks associated with assessing potential P losses on the basis of P mobility in the topsoil alone.en
dc.format.extent319-330en
dc.language.isoenen
dc.publisherAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of Americaen
dc.relationThe original publication is available from - American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America - http://jeq.scijournals.org/cgi/content/full/31/1/319en
dc.rightsCopyright © 2002 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of Americaen
dc.subjectphosphorusen
dc.subjectleachingen
dc.subjectflood irrigationen
dc.subjectgrassland soilsen
dc.subjectAgronomy & Agricultureen
dc.subject.meshSoilen
dc.subject.meshRisk Assessmenten
dc.subject.meshWater Movementsen
dc.subject.meshEnvironmental Monitoringen
dc.subject.meshEutrophicationen
dc.subject.meshAdsorptionen
dc.subject.meshModels, Theoreticalen
dc.subject.meshAgricultureen
dc.titlePhosphorus exchangeability and leaching losses from two grassland soilsen
dc.typeJournal Article
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciencesen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
lu.contributor.uniten
lu.contributor.uniten
dc.subject.anzsrc05 Environmental Sciencesen
dc.subject.anzsrc06 Biological Sciencesen
dc.subject.anzsrc04 Earth Sciencesen
dc.relation.isPartOfJournal of Environmental Qualityen
pubs.issue1en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.publication-statusPublisheden
pubs.publisher-urlhttp://jeq.scijournals.org/cgi/content/full/31/1/319en
pubs.volume31en
lu.identifier.orcid0000-0002-6966-0299
lu.identifier.orcid0000-0002-7631-1636
lu.identifier.orcid0000-0002-3082-994X


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