Fig. 3
From: Legume-based mixed intercropping systems may lower agricultural born N2O emissions
Daily N2O fluxes of the non-fertilized mono-crops (wheat (WT), faba bean (FB), poplar (PL), and Robinia (RB)), N-fertilized mono-crops (80 kg N ha−1 in the form of calcium-ammonium-nitrate; wheat (NWT) and poplar (NPL)), and non-fertilized mixed crops (wheat with faba bean (WFB) and poplar with Robinia (PRB)). Vertical arrows under the charts indicate application dates of mineral fertilizers. Horizontal bars above the charts indicate growing periods of crops. Error bars show the standard error of the mean of each treatment (n = 3)