Rodriguez-Cruz, M. Sonia, Jones, Julie E. and Bending, Gary D.. (2006) Field-scale study of the variability in pesticide biodegradation with soil depth and its relationship with soil characteristics. SOIL BIOLOGY & BIOCHEMISTRY, 38 (9). pp. 2910-2918. ISSN 0038-0717

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Abstract

The extent of within-field spatial variability of pesticide degradation was characterised in topsoil and subsoil, using the compounds isoproturon, bentazone and mecoprop, which are major contaminants of groundwater and surface freshwater in Europe. Twenty topsoil samples from 0 to 15 cm depth and twenty subsoil samples from 50 to 60 cm depth were collected from a single agricultural field within a 160 x 90 grid. It was shown that degradation rates of all compounds declined with soil depth. Variability of pesticide degradation rates, pesticide sorption and formation of non-extractable pesticide residues was higher in subsoil relative to topsoil. Furthermore, in the subsoil, there was variation in large scale soil physicochemical composition, which did not occur in topsoil. The greater variability in pesticide degradation rates in subsoil relative to topsoil could be the result of a greater range of degradation kinetics, which could reflect greater spatial variability in the distribution and/or activities of pesticide metabolising communities. (c) 2006 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Subjects:	S Agriculture
Journal or Publication Title:	SOIL BIOLOGY & BIOCHEMISTRY
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0038-0717
Date:	September 2006
Volume:	38
Number:	9
Number of Pages:	9
Page Range:	pp. 2910-2918
Identification Number:	10.1016/j.soilbio.2006.04.051
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/33110

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