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 Precision ag: the revolution has just begun 

Precision ag: the revolution has just begun

02 Mar, 2010 05:47 PM
THERE will be further advances in no-till cropping practices in Australia as more and more precision agriculture is incorporated into farming systems, according to two members of the Victorian No-Till Farmers Association (VNTFA).

Speaking at a VNTFA workshop in Nhill recently, Kewell, north-east of Horsham, farmer Rob Ruwoldt, and agronomist Andrew Newall, NewAg, Horsham, said that as the technology became better, there would be more upside for no-till farmers in the form of higher yields and lower input costs.

Trends such as controlled traffic and shielded spraying are being touted as ways that farmers can cut costs and boost yields.

But although there is scope for precision agriculture to benefit farmers, Mr Newall said no-till did not require an expensive plant.

“You don’t necessarily need hi-tech gear, you can get started by making some minor adjustments to your system, just like with removing harrows off the seeding bar, or putting on some press wheels,” he said.

Mr Ruwoldt said he was excited about the opportunities controlled traffic presented, especially in terms of further improving soil structure, which he believes is a key benefit of no-till.

“By using tram tracks, were cutting down our compaction, and it is really having an impact on soil structure, we’re boosting our carbon levels, and other indicators of soil health, such as worm numbers, are also up.”

He said that farmers converting to no-till would see benefits in terms of soil health quickly, within the first year, but was also optimistic there was plenty of scope for further improvements over the long haul.

“There hasn’t been a lot of work done on the long-term effects of no-till and the reduction of compaction, there could be good news more to come.”

The major benefit, however, of controlled traffic was the boost to plant available water.

When they didn’t have to fight through the hard pan formed by compaction, Mr Ruwoldt said plant roots were going down and accessing moisture further down in the soil profile.

“With a combination of CTF and no-till, we’ve seen a 90pc increase in plant available water,” Mr Ruwoldt said.

Mr Newall said there was a clear case for wider row spacings and standing stubbles in the Australian system.

“We are seeing the wider row spacings going well, and standing crop residue is really important in protecting the new crop.

“You’ll also see the crop growing quicker as it reaches for the light.”

Mr Ruwoldt added that a standing stubble provided an ideal trellis for low-growing pulse crops.

“The added harvestability of having a taller crop adds up to around an extra 0.4t/ha in lentils, which adds up in higher value crops.”

Other precision ag techniques which are having benefits include banded spraying, which targets only the inter-row portion of the crop where the weeds are growing.

“It is cutting costs, and there is plenty more we can do yet,” Mr Ruwoldt said.

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