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Type: Journal article
Title: Spatial distribution of diuron sorption affinity as affected by soil, terrain and management practices in an intensively managed apple orchard
Author: Umali, B.
Oliver, D.
Ostendorf, B.
Forrester, S.
Chittleborough, D.
Hutson, J.
Kookana, R.
Citation: Journal of Hazardous Materials, 2012; 217-218:398-405
Publisher: Elsevier Science BV
Issue Date: 2012
ISSN: 0304-3894
Statement of
Beng P. Umali, Danielle P. Oliver, Bertram Ostendorf, Sean Forrester, David J. Chittleborough, John L. Hutson and Rai S. Kookana
Abstract: We 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.
Keywords: Malus
Crops, Agricultural
Soil Pollutants
Rights: © 2012 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.jhazmat.2012.03.050
Appears in Collections:Aurora harvest 5
Earth and Environmental Sciences publications
Environment Institute publications

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