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Spatial distribution of diuron sorption affinity as affected by soil, terrain and management practices in an intensively managed apple orchard

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dc.contributor.authorUmali, B.
dc.contributor.authorOliver, D.
dc.contributor.authorOstendorf, B.
dc.contributor.authorForrester, S.
dc.contributor.authorChittleborough, D.
dc.contributor.authorHutson, J.
dc.contributor.authorKookana, R.
dc.date.issued2012
dc.description.abstractWe investigated how the sorption affinity of diuron (3'-(3,4-dichlorophenyl)-1,1-dimenthyl-urea), a moderately hydrophobic herbicide, is affected by soil properties, topography and management practices in an intensively managed orchard system. Soil-landscape analysis was carried out in an apple orchard which had a strong texture contrast soil and a landform with relief difference of 50 m. Diuron sorption (K(d)) affinity was successfully predicted (R(2)=0.79; p<0.001) using a mid-infrared - partial least squares model and calibrated against measured data using a conventional batch sorption technique. Soil and terrain properties explained 75% of the variance of diuron K(d) with TOC, pH(w), slope and WI as key variables. Mean diuron K(d) values were also significantly different (p<0.05) between alley and tree line and between the different management zones. Soil in the tree line generally had lower sorption capacity for diuron than soil in the alleys. Younger stands, which were found to have lower TOC than in the older stands, also had lower diuron K(d) values. In intensively managed orchards, sorption affinity of pesticides to soils was not only affected by soil properties and terrain attributes but also by management regime.
dc.description.statementofresponsibilityBeng P. Umali, Danielle P. Oliver, Bertram Ostendorf, Sean Forrester, David J. Chittleborough, John L. Hutson and Rai S. Kookana
dc.identifier.citationJournal of Hazardous Materials, 2012; 217-218:398-405
dc.identifier.doi10.1016/j.jhazmat.2012.03.050
dc.identifier.issn0304-3894
dc.identifier.issn1873-3336
dc.identifier.orcidOstendorf, B. [0000-0002-5868-3567]
dc.identifier.orcidKookana, R. [0000-0002-0477-3284]
dc.identifier.urihttp://hdl.handle.net/2440/72914
dc.language.isoen
dc.publisherElsevier Science BV
dc.rights© 2012 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.jhazmat.2012.03.050
dc.subjectMalus
dc.subjectCrops, Agricultural
dc.subjectDiuron
dc.subjectSoil Pollutants
dc.titleSpatial distribution of diuron sorption affinity as affected by soil, terrain and management practices in an intensively managed apple orchard
dc.typeJournal article
pubs.publication-statusPublished

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