Multi-site monitoring for N_2O emission factors of synthetic fertilizer in various soils with different redoximorphic features across Japan

The use of N fertilizers for agricultural production acts as a sources of atmospheric N_2O . Fertilizer induced N_2O emission considerably varies in accordance with environmental factors. We conducted a N_2O flux measurement campaign across 10 different experimental sites with various soil types throughout Japan and investigated the fertilizer induced N_2O emission factors (FIEFs) of synthetic fertilizers (mainly urea) in multiple growing periods at each experimental site. FIEFs considerably varied among the 10 sites, and measurement periods ranged from 0.00 to 7.13