As spray contractors covering vast country west of Moree, the deBeer family spends a lot of their time outwitting persistent weeds.

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To cover a lot of country quickly, they relay on a new twin-lensed drone, flying high enough to get good coverage while travelling at speed.

Cassie does the mapping while her husband Jacques and his brother Derek keep the ground units operational . The speed of the operation is remarkable.

"I can drop the kids at their bus in the morning and fly over 1700 hectares before I pick my kids up off the bus," she said. "I think I could do 2000/ha in a d

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