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Fig. 2. Environmental variables and gas fluxes during 2003 (mean ± standard error, n = 3). (a) Precipitation (cumulative during previous 10 d) and soil water content (0–10 cm), (b) air and soil (5-cm depth) temperatures, (c) N2O fluxes, and (d) CH4 fluxes under conventional (CT), conservation (CsT), and no tillage (NT). Values in parentheses in (c) are mean soil NO3– concentrations (mg N kg–1) over 0 to 10 cm across tillage treatments. Solid urea fertilizer was broadcast on 23 June.
