Managing people's expectations can make a big difference when they are introduced to a new crop. If you say to someone "Ulluco, a tuber a bit like a potato", then straight away you are setting up a mismatch between their mental image and the diminutive reality.
Here are the tubers I lifted last week...
last year's lot which were hit by early frost.
On the other hand if you say it's a low-growing plant with really nice succulent edible leaves, which can be grown under taller crops (so don't take up space), and which give a bonus harvest of beautiful little brightly-coloured bean-like tubers, then no-one is going to be disappointed.
Well, not unless the plants are frosted before they can tuberise, that is.
(have a look) and I think they benefited from all the extra watering that was lavished on the primary crop. What they definitely did not benefit from was the smothering effect of various volunteer Oca plants that came up amongst them.
However, they survived, and they did it without any real care or attention during the whole growing season.
Something for nothing—the type of crop I have space for.