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- W3005489011 abstract "Abstract This paper reports ammonia (NH3) emissions from irrigated, fertilized pastures grazed intensively by dairy cattle in Victoria, Australia. Irrigation bays (65 × 365 m) were grazed in rotation by 315 dairy cattle and daily emissions were measured in summer and autumn. After grazing for a few days, the bays were fertilized with urea at 50 kg N ha−1 and irrigated with 50 mm of water. Passive NH3 samplers were used to measure horizontal fluxes of NH3 from different sectors of the bays directly and the corresponding surface emissions were calculated from the sampler data using a backward Lagrangian stochastic (bLs) model of atmospheric dispersion. Ammonia emissions from the whole herd during the grazing phases were 14.8 kg NH3−N in summer, but only 2.0 kg NH3−N in autumn, corresponding to emission factors of 12% and 1% for an assumed annual input of nitrogen (N) in excreta of 150 kg N head−1 yr−1. Only 1% of the urea-N was lost through NH3 volatilization when irrigation followed fertilization immediately, but 6% was lost when irrigation was delayed for 3 days. The bLs model appears to be a useful tool for assessing gas emissions from dairy farm operations." @default.
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- W3005489011 date "2020-03-01" @default.
- W3005489011 modified "2023-10-18" @default.
- W3005489011 title "Ammonia emissions from irrigated pastures on Solonetz in Victoria, Australia" @default.
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- W3005489011 doi "https://doi.org/10.1016/j.geodrs.2020.e00254" @default.
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