Burrumbuttock Hay Runners founder Brendan Farrell has posted a strongly-worded video statement on the vegan protests.

Queensland Police has accidentally stumbled on a cannabis crop worth more than $30,000 after arresting another group of vegan activists allegedly involved in the March farm protests.

Police recently arrested four more people allegedly involved in the March 23 protest, that saw dozens of people allegedly trespass on a farm in Millmerran and speak to farmers.

When executing their search warrants, police accidentally stumbled on a sophisticated hydroponic set up at a unit in Rocklea in Brisbane.

Detectives from the rural organised crime squad seized a cannabis crop valued at more than $30,000.

A 38-year-old Brisbane man was charged with six drug related offences and was also interviewed and then charged in relation to the trespass incident at the Millmerran farm.

The man will appear in the Toowoomba Magistrates Court on June 25.

Police have now charged 14 people over the farm protest.

Some of the activists have already appeared in court where they were slapped with fines ranging from $500 to $1,3000.

After a spate of animal rights protests on farms and abattoirs, the state government last month allowed police and biosecurity officers to issue on-the-spot fines of $652.17 to activists on top of penalties for trespassing.

Police also released footage from the farm protest today and implored anyone in the video to come forward.

“If you are in this vision, you are encouraged to contact police,” Detective Inspector Troy Pukallus said.

“This is your one opportunity to do it at your own volition, before we come knocking on your door.”

Police also encouraged protesters to stay away from private property.

“Unauthorised entry by animal activists to places where animals are kept in Queensland occurs without regard for animal welfare, biosecurity, food safety and workplace health and safety risks,” Detective Inspector Pukallus said.

“This activity will result in prosecution.”