Fig. 3.

Cumulative nitrous oxide emission, precipitation and mean air temperature during maize growth in the 2nd harvest season (2017/18), as affected by the combination of N fertilization (0 and 150 kg ha^-1) and Brachiaria intercropping: B. brizantha (B) and B. humidicola (H). The arrow indicates when N fertilizer was applied to maize. Different letters indicate statistically significant differences among treatments (p ≤ 0.05). Legend abbreviations: M, MB, and MH denote monocrop maize, maize intercropped with B. brizantha, and maize intercropped with B. humidicola, respectively; 0 and 150 denote N rate applied to the maize crop.