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phosphorus rate

Catalogue: GRDC Updates
Phosphorus application improves grain yield regardless of variety choice, but limit the amount of P applied in direct contact with seed... Due to lack of adequate follow-up rain at both Nyngan and Trangie sites after the in-crop application, only the rate component of 2013 trials is reported ... Although N application can increase grain yield, it may reduce oil concentration in the grain, as shown at Gilgandra in 2012...
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Catalogue: GRDC Updates
Hybrids generally have larger seed than open pollinated varieties... In 2012 trials were conducted across northern NSW to investigate the effect of sowing depth, fertiliser rate and retained stubble on the establishment of several hybrid and open pollinated canola varieties... The paper reports only one season's trial data; there are several consistent messages from the trials across the northern region...
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Catalogue: GRDC Publications
In summary, 20 trials have now recently been undertaken across a number of seasons and locations in NSW. None of them have demonstrated S responses in yield or oil %. This does not exclude deficiency and yield penalties from occurring but does highlight that the frequency and the likelihood is not high... Delaying any action that has the potential to cease grain fill will see more seeds achieve their maximum size and improve yield... In summary there was no 'concerning' level of seed loss observed at any trial or timing, correlating well with the yield data...
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