Potato mixtures in the andes

[Ocimum]

Hi everyone,
I read somewhere that potatoes were grown in mixture of varieties in the Andes, but I can't seem to find my source anymore. Does someone know if I mistaken something, or do you know of a book/ paper where something like this is written?
Thanks

[nathanp]

I don't think that's quite right.  They did have many different potato varieties, and they did have potatoes for many reasons, some culinary, some practical, and many and adapted to sub or microclimates.  Generally they would grow varieties separately.  I'm not sure I've heard of them being grown in mixtures.

[Ocimum]

I found it now, thanks anyway.

For example here:
Brush, Stephen B.; Taylor, J.Edward; Bellon, Mauricio R. (1992): Technology adoption and biological diversity in Andean potato agriculture. In Journal of Development Economics 39 (2), pp. 365–387. DOI: 10.1016/0304-3878(92)90044-A.

and another one, where they mention a Quechua name for the varietal mixtures of potatoes