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Late application of N in wheat struggles to generate economic gain
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"Results from the project suggest that trying to increase wheat protein with late foliar N application is unlikely to be a very effective management tool in areas where spring rainfall is highly erratic," he said... Although the late foliar application of N can deliver significant increases in protein, it is unlikely to deliver an economic benefit unless grain N recovery rates are high, untreated protein levels are close to a receival grade threshold and the premium between receival grades is at least $20/t," he said... "In terms of application, multiple low rate application in the 2014 trials did not appear to improve the response compared to the same rate applied in one application...
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GRDC Final Reports