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ammonia volatilisation

Catalogue: GRDC Updates
Field trials on northwest NSW cracking clay soils (Vertosols) during 2011-2013 showed that surface application of urea led to ammonia volatilisation averaging 11% N loss when applied to fallow soils, and 5% N loss when applied to tillering wheat crops... Compared to urea, losses from ammonium sulfate were less, except when the soil contained >2% calcium carbonate (lime)... At the conclusion of the month, we sampled soils and plants (at in-crop and pasture sites) and measured soil nitrate and ammonium and plant total N. We did not measure N uptake into grain...
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Catalogue: GRDC Media
Research aids decisions on fertiliser application.. Conversely calcium carbonate content did not affect losses from urea or other nitrogen fertilisers trialled so growers with high calcium carbonate content soils will incur less risk by tailoring their fertiliser type ... As a high input cost, fertiliser selection and application need to be managed well if growers are to maximise crop returns and this type of research is a valuable step forward in enabling industry to achieve that goal...
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Catalogue: GRDC Media
GRDC research queries N losses on northern soils.. The amount of N lost is affected by a number of factors including fertiliser compound, fertiliser form, type of application, timing of application, soil properties, rainfall amount and intensity, and the temperature and windiness after application... The quantity of N lost as ammonia depends on a range of factors including fertiliser compound, fertiliser form, type of application, timing of application, soil properties, rainfall amount and intensity, and the temperature and wind after application...
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Catalogue: GRDC Media
GRDC research queries N losses on northern soils.. The amount of N lost is affected by a number of factors including fertiliser compound, fertiliser form, type of application, timing of application, soil properties, rainfall amount and intensity, and the temperature and windiness after application... The quantity of N lost as ammonia depends on a range of factors including fertiliser compound, fertiliser form, type of application, timing of application, soil properties, rainfall amount and intensity, and the temperature and wind after application...
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Catalogue: GRDC Final Reports
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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Catalogue: GRDC Media
Research aids decisions on fertiliser application.. Conversely calcium carbonate content did not affect losses from urea or other nitrogen fertilisers trialled so growers with high calcium carbonate content soils will incur less risk by tailoring their fertiliser type ... As a high input cost, fertiliser selection and application need to be managed well if growers are to maximise crop returns and this type of research is a valuable step forward in enabling industry to achieve that goal...
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