No-tillage systems linked to reduced soil N2O emissions in Mediterranean agroecosystems

Font: Plaza-Bonilla, D., Álvaro-Fuentes, J., Bareche, J. et al. (2018). No-tillage reduces longterm yield-scaled soil nitrous oxide emissions in rainfed Mediterranean agroecosystems: A field and modelling approach. Agriculture, Ecosystems & Environment, 262: 36-47.European Commission DG Environment News Alert ServiceMost emissions of nitrous oxide (N2O) are linked to the use of nitrogen (N) fertiliser in agriculture, highlighting a need for agricultural management practices that reduce emissions while maintaining agronomic productivity. A new study has assessed the long-term impact of conventional tillage (CT ¿ where soil is prepared for agriculture via mechanical agitation) and no-tillage (NT) systems on soil N2O emissions and crop productivity in rain-fed Mediterranean conditions. The findings show that, over a period of 18 years, mean yield-scaled (i.e. per unit grain yield) soil N2O emissions (YSNE) were 2.8 to 3.3 times lower under NT than CT. The researchers therefore recommend NT as a suitable strategy by which to balance agricultural productivity with lower soil N2O emissions in rain-fed Mediterranean agroecosystems