Availability to limit take up of liquid fertiliser

03 Sep, 2009 04:00 AM
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American fluid fertiliser specialist Dr Larry Murphy believes constraints on the availability of commercial liquid phosphorus products will in turn constrain the uptake of liquid fertiliser technology.

Dr Murphy, president of the Fluid Fertiliser Foundation in Kansas, has spent more than 40 years researching and refining fluid fertiliser technology.

He is currently on a lecture tour of South Australia and Victoria.

In the United States, the favoured form of liquid P is ammonium polyphosphate (APP), a product that must currently be imported into Australia at a premium over solid P products.

For that reason, among others, Dr Murphy believes it unlikely that fluid fertilisers will become more popular than granules, but he believes liquids have a vital place in cropping systems.

Dr Murphy will tell delegates to a series of IPM Masterclass programs run by Nexus Agronomy that liquid P, like other liquid fertilisers, offer significant advantages in delivery and uptake that gives the technology an important role in agriculture—particularly for those on a minimum till program.

* The IPM Masterclass series is being held at Blyth, SA, on September4; Swan Hill, Vic., on September 8; Shepparton, Vic, on September 10 and Beaufort, Vic, on September 11. For more information contact Darren Cribbes, Nexus Agronomy, on (03) 9512 0602 or 0400 600 556.

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