A research institute specialising in food science says New Zealand needs to move away from producing as much food as possible and towards more specialised products.
The Riddet Institute estimates New Zealand's farms can feed 20 million people at the most - a tiny fraction of a world population which could reach 9 billion by 2050.
A principal scientist, Mike Boland, is part of a group investigating how New Zealand can contribute to the increasing demand for food.
Dr Boland says although land and resources such as water are limited, New Zealand could double the number of people it can feed by focusing on value-add products.
