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fertiliser nitrogen

Catalogue: Ground Cover
Top-dressing nitrogen onto crops, fallows and pastures may not be as risky as is generally thought if rain does not fall soon after application... Nitrogen volatilisation losses were assessed in 15 paddocks covering four scenarios: top-dressing wheat; autumn fallow broadcasting ahead of winter cropping; spring fallow broadcasting ahead of summer cropping; and autumn and spring fertiliser application to a grass-based pasture... How much is lost depends on a range of factors including rainfall amount, soil moisture, temperature, pH, naturally occurring lime in the soil, ground cover, wind, soil-clay percentage and fertiliser type...
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Catalogue: GRDC Media
" the results may be a game changer for northern grain growers because they usually try and time nitrogen applications with rainfall events to avoid loss of nitrogen into the atmosphere due to volatilisation," Mr Clark says... Dr Schwenke said the research looked at how much nitrogen was lost when applied to the soil surface in different formulations at different times... Two fallow paddocks broadcast with urea or ammonium sulphate in spring also had minor losses, except where ammonium sulphate was spread on a paddock with carbonates at the surface when losses were more than 30pc of that added...
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Catalogue: GRDC Updates
Improve nitrogen use efficiency... Entec and Green Urea are products available to reduce N losses.. After the effects of Entec have worn off, expect to see a recovery in nitrification in the soil...
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