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Effects of cropping (bare fallow, grass), heavy irrigation and N fertilization (0, 100 kg ha-1) on soil air (at depths of 15 and 30 cm) and N2O emission were studied in a factorial two-year field experiment in southern Finland. The responses of soil mineral N, dry-matter yield and uptake of N were also determined. Irrigation was performed during two periods in 1993 and one period in 1994. During sampling periods, the soil moisture ranged from 11% to 45% (v/v) and soil temperature from 0°C todoi:10.23986/afsci.5612 fatcat:n2ine6btnnb2hlpfudkzithsw4