Nfr Codes :4d1

This chapter considers the emissions of ammonia (NH3), nitrous oxide (N2O), other oxides of nitrogen (NOx), carbon dioxide (CO2), methane (CH4), and non-methane volatile organic compounds (NMVOCs) from agricultural soils to which nitrogen (N)-containing fertilizers are applied. For NH3, emissions following application of animal manures to land are considered in SNAP code 100900, Manure Management Regarding Nitrogen Compounds. Although losses of NH3 from N-fertilizers applied to grass grazed by livestock are difficult to distinguish from subsequent NH3 emissions from urine patches produced by grazing animals, emissions are calculated separately; the calculation results are then compiled in this chapter. Ammonia emissions from grazed grassland due to decomposition of animal excreta applied to land are calculated in SNAP Code 100900, nitrous oxide losses after application are covered in this chapter. Persistent Organic Pollutants are dealt with separately under SNAP code 100600, Use of Pesticides.