5 PAGES OF CROPS FOR A CHANGING CLIMATE
Oca or is a small, elongated tuber that comes in a range of bright colours and which originated in the Andean Highlands. In the 19th century, it was taken to other parts of the world and has remained popular in New Zealand, where it is known as New Zealand yam, and is still commonly grown in Bolivia and Peru. The plant might look familiar as it's related to wood sorrel that grows in
