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Published online 1 May 2009
Published in J Environ Qual 38:1066-1075 (2009)
DOI: 10.2134/jeq2008.0085
© 2009 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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Nitrogen, Phosphorus, and Bacteria Tile and Groundwater Quality Following Direct Injection of Dewatered Municipal Biosolids into Soil

N. Gottschalla, M. Edwardsa, E. Toppb, P. Boltona, M. Paynec, W. E. Curnoed, B. Ball Coelhob and D. R. Lapena,*

a Agriculture and Agri-Food Canada, Ottawa, ON, Canada, K1A 0C6
b Agriculture and Agri-Food Canada, London, ON
c Ontario Ministry of Agriculture, Food, and Rural Affairs, Stratford, ON
d Univ. of Guelph-Kemptville, Kemptville, ON


Figure 1
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  		Fig. 1. Average daily air temperature, hourly precipitation, and hourly tile flow for the 2006 study period. Tile flow is for T1(DI).

 

Figure 2
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  		Fig. 2. Soil water content (%) and temperature (°C) at 10 and 20 cm depths.

 

Figure 3
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  		Fig. 3. Tile drain water quality parameters in (mg) or (CFU) per 15 min for samples collected over the early study period (<100 d postapplication).

 

Figure 4
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  		Fig. 4. Tile drain water quality parameters in (mg) or (CFU) per 15 min for samples collected over the late study period (>100 d postapplication).

 

Figure 5
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  		Fig. 5. Groundwater NO3–N concentrations (mg L–1) at 1.2 and 2.0 m depth for treatment and control plots for the study period. Data were averaged by treatment for each sampling event. Error bars represent standard error.

 

Figure 6
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  		Fig. 6. Groundwater Escherichia coli and Clostridium perfringens (CFU L–1) for study period at 1.2 m depth.

 

Figure 7
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  		Fig. 7. Land applied DMB Escherichia coli concentrations (CFU L–1) for the study period. Data were averaged by treatment for each sampling event. Error bars represent standard error.

 




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