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Published online 5 July 2005
Published in J Environ Qual 34:1270-1276 (2005)
DOI: 10.2134/jeq2005.0008
© 2005 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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Maximum Rates of Nitrate Removal in a Denitrification Wall

Louis A. Schippera,b,*, Gregory F. Barklec and Maja Vojvodic-Vukovica

a Landcare Research NZ Ltd, Private Bag 3127, Hamilton, New Zealand
b Now at Department of Earth Science, University of Waikato, Hamilton, New Zealand
c Aqualinc Research Ltd, Private Bag 14041 Enderley, Hamilton, New Zealand



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  		Fig. 1. Nitrate concentrations in Wells 1, 2, 3, and soil water during the course of the trial. Error bars are one standard deviation.

 


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  		Fig. 2. Increase in bromide and nitrate in Well 4 that was furthest from the injection trench.

 


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  		Fig. 3. (A) Denitrification rates (with range of amendments) and (B) denitrifying enzyme activity during the dosing trial determined in laboratory incubations. All units are per cm–3 of wall material. Errors bars are one standard deviation.

 


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  		Fig. 4. Changes in (A) microbial biomass and (B) carbon availability during the dosing trial. Units are per cm–3 of wall material. Errors bars are one standard deviation.

 


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  		Fig. 5. Relationship between daily-average nitrate and daily-average denitrification rate determined in laboratory incubations without nitrate amendments. Units are per cm–3 of wall material.

 




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