Constraining the conditions conducive to dissimilatory nitrate reduction to ammonium in temperate arable soils

► We demonstrate the potential for DNRA to contribute to N cycling in temperate arable soils. ► DNRA was positively correlated with soil pH, bulk density, sand %, NO2− concentration and C:NO3−. ► Significance of DNRA is likely to depend on the provision of a low molecular weight C sourc.