Because of an unfortunate combination of economics, farming tradition and genetics, Nigeria's general supply of seed yams is riddled with disease, threatening a crop that is indispensable to the country's diet and economy. But a group of scientists think they've found a way to make good seed yams like Adaikwu's more widely available — and hopefully provide a bulwark against climate change for the country's small farmers. http://i.imgur.com/Xr89ia...
