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Published online 5 January 2006
Published in J Environ Qual 35:312-323 (2006)
DOI: 10.2134/jeq2004.0025
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Fate of Diuron and Linuron in a Field Lysimeter Experiment

L. Guzzellaa,*, E. Caprib, A. Di Corciac, A. Barra Caracciolod and G. Giulianod

a Istituto di Ricerca sulle Acque - CNR, via Della Mornera 25, 20047 Brugherio (MI), Italy
b Istituto di Chimica Agraria ed Ambientale, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29100 Piacenza, Italy
c Dipartimento di Chimica, Università La Sapienza, Piazza Aldo Moro 5, 00100 Roma, Italy
d Italy Istituto di Ricerca Sulle Acque - CNR, Via Reno 1, 00198 Roma, Italy



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  		Fig. 1. Position of lysimeters (empty circle) and of paper filters (filled circle) in the experimental plot. The position in the x–y scale is given in meters.

 


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  		Fig. 2. Scheme of a soil enclosure lysimeter; the plate is located between the lysimeter and its base.

 


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  		Fig. 3. Total volume (L) of soil pore water collected from each lysimeter and diuron and linuron recovered mass (µg).

 


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  		Fig. 4. Amount of precipitation (mm), before leachate collection, throughout the experiment.

 


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  		Fig. 5. Lysimeter 1 herbicide concentrations (µg L–1) in soil pore water samples throughout the experiment.

 


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  		Fig. 6. Lysimeter 5 herbicide concentrations (µg L–1) in soil pore water samples throughout the experiment.

 


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  		Fig. 7. Mean concentrations (µg L–1) of diuron, linuron, and transformation products (TPs) in soil pore water samples from all 10 lysimeters.

 


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  		Fig. 8. Mean concentrations (µg L–1) of diuron, linuron, and transformation products (TPs) in soil samples (0–10 cm).

 


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  		Fig. 9. Bacterial abundance (number of bacteria per gram of soil) vs. soil abiotic factors (percent organic C; percent H2O; temperature) in surface soil samples. The vertical bars represent the standard errors.

 




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Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.