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applied nitrogen

Catalogue: GRDC Media
Western Australian grain growers may need to consider adjusting 2014 nitrogen fertiliser strategies due to the influence of high stubble loads and a dry summer and autumn on plant available nitrogen in the soil... Mr Ryan suggested growers use these results and assess stubble loads to determine if additional fertiliser was required, and consider adjusting their nitrogen application method at seeding time or using split (separate) nitrogen applications which could decrease any risk of low nitrogen availability... "Knowing your current soil nitrogen status; stubble density; stubble quality (including the amount of nitrogen relative to carbon); and soil moisture content can help you manage fertiliser applications and rates to ensure that adequate nitrogen is supplied to the crop," he said...
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Catalogue: Ground Cover
Bar chart showing yield and oil response of canola to nitrogen applied at seeding.. Mr Street says it is clear that if growers are applying no nitrogen or only small amounts (40kg/ha or less) then in many cases they are sacrificing yield... While, overall, nitrogen application resulted in lower seed oil content (higher protein), Mr Street says a typical one per cent drop required an increase of only 15kg/ha of yield to compensate, which was easily achieved in most cases...
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Catalogue: GRDC Publications
Influence of fungicide rate (mean of fungicide products - four site mean) Stem rust control assessed over the four trial sites revealed that using high rates was essential for the control of the disease, even if the fungicide had been applied prophylactically (before infection was visible in the crop)... Influence of cultivar resistance and fungicide application (Prosaro ) on yield and stem rust severity measured on the flag sheath 18 days after fungicide application at early dough (GS82) and assessed at mid dough - physiological maturity (GS85-90) - Bairnsdale, Gippsland, Victoria, 2010... The yield potential for the crop with no nitrogen applied is estimated at GS30 from the results of numerous of trials conducted in that region where NDVI at GS30 is divided by the number of growing degree days (GDD) greater than 0 C since planting, referred to as the INSEY units (in season estimate of yield)...
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Catalogue: Ground Cover
Trial studying the timing of late nitrogen applications in wheat post-flowering at Brookstead, Queensland... Figure 1 Mean impact of late foliar application of nitrogen on grain protein in 2012... "The trials clearly showed that late foliar applications of nitrogen are capable of lifting protein levels but we were generally unable to generate any net benefit," he says...
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Catalogue: Ground Cover
Trial studying the timing of late nitrogen applications in wheat post-flowering at Brookstead, Queensland... Figure 1 Mean impact of late foliar application of nitrogen on grain protein in 2012... "The trials clearly showed that late foliar applications of nitrogen are capable of lifting protein levels but we were generally unable to generate any net benefit," he says...
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Catalogue: Ground Cover
Around the world cereals, oilseeds and pulses that make better use of applied nitrogen fertiliser are under development.. The idea looks simple on paper - endow all the major cereals, legumes and oilseeds with an enhanced potential to take up, assimilate, store or move nitrogen into grain thereby maximising yield and grain quality while reducing costs and waste... Overall, the signs are promising that NUE traits can be developed, allowing nitrogen's yield-enhancing value to be retained while diminishing its spiralling costs...
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Catalogue: Ground Cover
Around the world cereals, oilseeds and pulses that make better use of applied nitrogen fertiliser are under development.. The idea looks simple on paper - endow all the major cereals, legumes and oilseeds with an enhanced potential to take up, assimilate, store or move nitrogen into grain thereby maximising yield and grain quality while reducing costs and waste... Overall, the signs are promising that NUE traits can be developed, allowing nitrogen's yield-enhancing value to be retained while diminishing its spiralling costs...
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Catalogue: Ground Cover
On-farm trials at Corrigin, WA, exploring wheat protein responses to nitrogen applications at different rates and times... Risk-averse growers tend to be conservative in their use of nitrogen... Split application "Split application improves the recovery of applied nitrogen, and if some of your nitrogen is applied after the beginning of stem elongation you are more likely to get a response in protein than if all the nitrogen is applied at sowing," Dr Milroy says...
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Catalogue: Ground Cover
Brent Herrmann, who hosted a series of NANORP trials on his family's farm near Hamilton, in western Victoria, says the trials highlighted the risk of nitrogen loss as nitrous oxide (N 2 O) as a consequence of deep-banding nitrogen fertiliser on soils that later become waterlogged... "We get denitrification with waterlogging, so we fertilise most crops three times: with 10 kilograms of nitrogen per hectare applied as monoammonium phosphate fertiliser at sowing; before it gets wet in July we apply another 30 to 40kg of nitrogen; and then we apply another 40kg of nitrogen when the wheat is jointing.".. "We need to think about lots of other factors, including the varieties we grow and how much nitrogen the crop is getting from rain through soil mineralisation and from pulse crops."..
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Catalogue: Ground Cover
To reduce losses avoid unnecessarily high nitrogen rates.. Dr Schwenke says nitrate denitrification losses can be large, but require a combination of low soil oxygen (an extreme example is when soils are waterlogged for an extended period), high soil nitrate concentration (soon after soils have been fertilised) and readily available (labile) carbon to support an active microbial community... According to Professor Bell, the results showed that between 0 and 44 per cent of the applied nitrogen was not able to be recovered in the soil or plant at harvest, with in-season rainfall, both timing and amount, and soil carbon and nitrogen status having a major impact on these seasonal losses...
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