Nitrous oxide release from arable soil: Importance of N-fertilization, crops and temporal variation

Throughout 33 months nitrous oxide (N2O) release rates were measured from a field experiment comparing crop and N-fertilization treatments laid out on a luvisol derived from loess. Winter wheat, winter barley, winter rape and sugar beet were cultivated using conventional soil management. Each crop was fertilized at three rates of N application (N 1.0: usual, N 0.5: 50% of usual, N 0.0: unfertilized). N2O losses obtained were correlated with...