Fig. 2 Treatment effects on N₂O emission from fertilized plots (n = 3, each treatment) in Exp. 1. Treatment codes are as follow: CT, control; H2O, deionized water; C, glucose-C; NH4, NH₄–N; NC, NH₄–N plus glucose-C; W, liquid swine waste. The CT treatment received no nutrient addition, while all other treatments consisted of a liquid phase application of 2.5 cm. Error bars represent ±1 SD. Fluxes followed by the same letter on each sampling date do not differ significantly by Tukey's HSD

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