Saturday, 27 December 2025 11:55

Environment Canterbury promotes on-farm composting as a practical alternative to offal pits

Written by  Staff Reporters
A group of 10 farmers across the region have been testing the guidance, putting it into practice over the past year. A group of 10 farmers across the region have been testing the guidance, putting it into practice over the past year.

Environment Canterbury, alongside industry partners and a group of farmers, is encouraging farmers to consider composting as an environmentally friendly alternative to offal pits.

The council is offering in-depth guidance for farmers on how to compost animal mortalities on-farm.

The guidance has been developed in partnership with a group of test farmers across Canterbury, with support from DairyNZ, Synlait, and Morven Glenavy Ikawai (MGI) Irrigation Company Ltd.

Melissa Gilespie, Environment Canterbury senior farm plan advisor and composting project lead, says the guidance was born out of a clear need.

“We’ve been hearing from farmers that the options for dealing with animal mortalities are increasingly limited," Gillespie says.

"Offal pits can be problematic in terms of environmental impact. And there are less options available for getting carcasses taken away. So, interest in composting has increased a lot in recent years," she adds.

“After a bit of discussion about this at our Farm Environment Plan Audit Reference Group (FEP ARG) hui (meetings), we decided we all needed to work together to develop really practical guidance on how to compost livestock successfully.”

Gillespie says that collaborating with farmers has been critical for the composting management guidance to come together.

“This guidance is peer-to-peer, farmer-to-farmer. All the learnings and knowledge in the guidance have come from farmers who have experience with composting and have been testing our draft guidance over the last year.”

“The response has been overwhelmingly positive – farmers are excited about it. Composting is a great solution, and it’s pretty straight forward to get going.”

A group of 10 farmers across the region have been testing the guidance, putting it into practice over the past year.

Waimakariri dairy farmer, Gavin Bay, says it's easy - once it's set up, it pretty much looks after itself.

“The main reason we started a compost pile was because it’s getting harder every year to get rid of dead stock, and we’re all about lessening our impact on the environment. It’s actually not that hard. Once it’s set up, it pretty much looks after itself. My best advice is to get good contractors to help set it up, and plan well where you’re going to put your pile. It’s a great method of getting rid of your dead stock, and it doesn’t take a huge area.”

Ashburton chicken and calf farmer, Simon Raisbeck, composts his farm’s waste, including mortalities and unsaleable eggs, to improve soil quality.
 
“It’s a great way to get rid of waste products on the farm, but also to improve the soil structure on the farm. The compost really helps retain the moisture in the soil. I say, use what you’ve got to the best of your ability – compost is a fantastic material. It’s easy to do. Why not use it and improve your soil structure with it?”

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