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Final Report: UM00028 - Indirect greenhouse gas emissions from wheat-sheep farming systems

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The variability of ammonia volatilisation (5-26% of applied urea nitrogen (N)) associated with initial moisture status and the occurrence of follow-up rain leads to the conclusion that sophisticated modelling of this process is unlikely to be practical for accounting purposes... Large nitric oxide emissions are linked to rising nitrate concentrations in soil... While small emissions of nitric oxide occur during periods of near-constant soil nitrate concentration, large nitric oxide emissions are linked to rising nitrate concentrations in soil...
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