Encouraging to see the World Bank taking special notice of the potash initiative in this article
http://eco-opia.org/2015/01/26/can-ethiopias-resource-wealth-contribute-to-its-growth-and-transformation/
One dead document link in the article but the rest are good ;-)
Excerpt:
Diversification of Ethiopia’s economy and facilitation of economic linkages to avoid heavy dependency on the resource wealth: The linkages that are being created between the potash and agricultural industries in the Afar Region is just one example of potential economic partnerships; supporting the production of potash fertilizers in order to increase small holder farmer’s crop production.