Spatial heterogeneity within the plough layer: high variability of N2O emission rates

The spatial heterogeneity and the temporal variability of N2O emission rates were examined in an arable soil. The N2O emission rates were measured using soil cover boxes. Rates were measured systematically at regular distances (7 m) on a sampling grid (9 rows×9 columns) across a field plot site (60×63 m). There were two sampling periods, one before (March, 4 flux rate measurements) and one after (May, 6 flux rate measurements) a field experiment...