Aerial application of herbicides, fertiliser and seeds could be the answer to preventing soil erosion.
It has put up provocative billboards on arterial roads around the country in time for the summer.
The no-frills billboards targeting fertiliser co-ops read: ‘Ravensdown and Ballance pollute rivers. #TooManyCows’.
Two of the billboards are a stone’s throw from the Ravensdown headquarters in Christchurch and Ballance’s in Mount Maunganui.