Figure 1

Cumulative N2O flux (kg N ha−1) from experimental fertilizer treatments during the maize cropping period (30 Jan 30 to 2 Jun 2015). Each point shown at each fertilizer level is a replicate plot within a treatment. Exponential model (“N2O_exp” in Table S2, R2 = 0.32) fit shown as a solid line and linear model (“N2O_lin” in Table S2, R2 = 0.32) shown as a dashed line.