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- W62823680 abstract "Approximately 70% of the nitrogen fertiliser used in the agricultural sector is applied to cereals. Farmers in cereal production systems throughout Australia require viable options for reducing N2O and nitrogen based emissions generally from soil without compromising productivity and profitability. In the northern grains zone (of northern NSW and Qld) N2O emissions can be high from nitrogen fertiliser applied to summer crops, due to the combination of poor internal drainage on the heavy clays and extended fallowing which allows build-up of soil water and mineral N reserves prior to crop establishment. In the high rainfall zone of south eastern Australia, annual N2O losses as high as 35 kg N ha-1 have been measured from duplex soils rich in carbon and nitrogen after extended periods of waterlogging when synthetic nitrogen is applied in excess of crop demand to these soils. On the sandier soils of Western Australia, increasing soil carbon is likely to enhance soil N2O emissions, however these losses are relatively insignificant and represent less 0.1% of the N fertiliser applied. A wide variety of strategies are being trialled across the Australian grains industry to improve nitrogen use efficiency generally which will reduce losses of N2O and associated nitrogen gases. These strategies include different rates of N fertiliser applied with and without nitrification and urease inhibitors, different timing (at sowing versus in-crop) and placement (top-dressed versus incorporated) of nitrogen fertilisers, the substitution of synthetic sources of nitrogen with leguminous sources, and strategies to increase soil organic matter stocks generally which will reduce the reliance on synthetic nitrogen inputs." @default.
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- W62823680 date "2014-01-01" @default.
- W62823680 modified "2023-09-25" @default.
- W62823680 title "Reducing N2O and associated nitrogen emissions from grain-growing soils of Australia" @default.
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