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Agriculture is one of the major sources of nitrous oxide (N₂O), a potent greenhouse gas (GHG) whose atmospheric concentrations are estimated to increase with efforts to increase food production through increasing nitrogen (N) inputs. The objective of this study was to quantify N₂O emissions from maize (Zea mays L.) and winter wheat (Triticum aestivum L.) fields amended with inorganic, organic N and a combination of both sources (integrated management), in tropical (Zimbabwe) and temperate (China) climatic conditions. In Zimbabwe N₂O emissions were measured from maize plots, while in China emissions were measured from maize and winter wheat plots. In Zimbabwe the treatments were; (i) Control, (ii) 60 kg N ha⁻¹ ammonium nitrate (NH₄NO₃), (iii) 120 kg N ha⁻¹ NH₄NO₃, (iv) 60 kg ha⁻¹ cattle (Bos primigenius) manure-N, plus 60 kg N ha⁻¹ NH₄NO₃, (v) 60 kg N ha⁻¹ cattle manure-N, and (vi …