New Zealand’s traditional pasture-based farming system faces a conundrum, a leading scientist has warned. Pastoral Genomics scientist Michael Dunbier said we were no longer the world’s lowest-cost food producer, our pastoral system was a major contributor of greenhouse gases, and customers demanded proof that slogans such as clean and green had some validity reports The ODT.

The reality was the our farming systems were contributing methane and nitrous oxide into the atmosphere and nitrate pollution of the soil and waterways. “They are not satisfied with slogans such as free-range or pasture-fed. We need to look carefully at our systems overall,” he said. In addition, resources such as phosphate were being depleted and questions were being asked about the efficiency and sustainability of fertiliser use in general.

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