More farmers are recycling their plastic silage wrap, with recycling specialist Plasback collecting 3000 tonnes of it in the past four years and expecting to grow.
The scheme was started eight years ago and just nine tonnes of waste plastic were collected that year.
Plasback manager Chris Hartshorne said farmers were showing they were committed to the programme.
But also helping drive the increase was Canterbury Regional Council banning the burning of polyethylene agricultural silage and baleage wraps.
"Another major driver of the growth in the scheme has been the Environment Canterbury report looking into the issue of non-natural farm waste, and that has found that actually the volumes that are out there ... are actually quite significant," Mr Hartshorne said.
"For us to be able to provide a service that takes away not only silage wrap but a number of different plastics from the farm gives farmers a good option for the disposal of that, so they don't have to burn or bury it on the farms."