Federated Farmers is challenging the Green Party's crack down on nitrate levels in fresh water.
If elected, the party's promising stronger national standards for fresh water, more robust rules for wastewater discharges, and the phasing out of synthetic nitrogen fertiliser.
Federated Farmers West Coast President Simon Cameron told Ryan Bridge there have been issues in the past, but the industry has come a long way.
He says phasing out nitrogen fertilizer would reduce the country's production by at least 25%, and as an export nation, our income would be threatened.
Podden och tillhörande omslagsbild på den här sidan tillhör
Newstalk ZB. Innehållet i podden är skapat av Newstalk ZB och inte av,
eller tillsammans med, Poddtoppen.