Nitrous oxide(n20) 310 Nitrous oxide E=5 300 290 280 175018001850190019502000 Rate of increase 0.25%/year Use of fertilizer increases both nitrification and denitrification increase N20 productionNitrous oxide (N2O) Rate of increase 0.25%/year Use of fertilizer increases both nitrification and denitrification → increase N2O production