A biological fix for nitrogen fertiliser run-off is being trialled near Tully in far-north Queensland, as part of a collaboration between scientists and farmers.Bioreactors, made up of trench systems dug around sugarcane fields, are being tested at Queensland farms
Many farmers still dispute that they are at fault for the allegations of nitrogen run-off levelled at them A 10-metre trench dug between sugarcane paddocks and a nearby drain will trap water running from the field, where it will slowly filter through woodchips where bacteria strip it of any nitrates. "It's a carbon-rich, oxygen-poor environment — essentially it will be like a giant peaty swamp," he said.
This is how aquaponics systems convert fish waste into food for the plants, so those trenches could also carry a secondary crop.
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