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Published online 27 February 2006
Published in Soil Sci Soc Am J 70:570-581 (2006)
DOI: 10.2136/sssaj2005.0042
© 2006 Soil Science Society of America
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Emissions of Nitrous Oxide and Carbon Dioxide

Influence of Tillage Type and Nitrogen Placement Depth

C. F. Drurya,*, W. D. Reynoldsa, C. S. Tana, T. W. Welackya, W. Caldera and N. B. McLaughlinb

a Greenhouse and Processing Crops Research Centre, Agric. & Agri-Food Canada, Harrow, ON, Canada N0R 1G0
b Eastern Cereal and Oilseed Research Centre, Agric. and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, Canada K1A 0C6


Figure 1
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  		Fig. 1. Volumetric soil water content in the 0- to 10-cm depth for the conventional tillage, no-tillage, and zone tillage treatments with shallow (2 cm) and deep (10 cm) N fertilizer banding. Error bars (n = 6) indicate standard error and those not shown were smaller than the symbols.

 

Figure 2
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  		Fig. 2. Soil temperature in the 0- to 10-cm soil depth for the conventional tillage, no-tillage, and zone tillage treatments with shallow (2 cm) and deep (10 cm) N fertilizer banding. Error bars (n = 6) indicate standard error and those not shown were smaller than the symbols.

 

Figure 3
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  		Fig. 3. Nitrous oxide emissions from April until November 2000, 2001, and 2002 for shallow (2 cm) and deep (10 cm) N placement in the conventional tillage, no-tillage, and zone tillage corn phase of a wheat–corn–soybean rotation. Error bars are standard error (N = 6). Arrows denote the time of sidedress N application to corn.

 

Figure 4
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  		Fig. 4. Soil nitrate in the 0- to 30-cm depth during the 2000, 2001, and 2002 growing seasons for shallow (2 cm) and deep (10 cm) N placement in the conventional tillage, no-tillage, and zone tillage corn phase of a wheat–corn–soybean rotation. Error bars are standard error (N = 6). Arrows denote the time of sidedress N application to corn.

 

Figure 5
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  		Fig. 5. Carbon dioxide emissions from April until November 2000, 2001, and 2002 for shallow (2 cm) and deep (10 cm) N placement in the conventional tillage, no-tillage, and zone tillage corn phase of a wheat–corn–soybean rotation. Error bars are standard error (n = 6).

 




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