From this NYTimes article:
This year, a nation that has perennially extended a begging bowl to the world is instead feeding its hungry neighbors. It is selling more corn to the World Food Program of the United Nations than any other country in southern Africa and is exporting hundreds of thousands of tons of corn to Zimbabwe.
In Malawi itself, the prevalence of acute child hunger has fallen sharply. In October, the United Nations Children’s Fund sent three tons of powdered milk, stockpiled here to treat severely malnourished children, to Uganda instead. “We will not be able to use it!” Juan Ortiz-Iruri, Unicef’s deputy representative in Malawi, said jubilantly.
Farmers explain Malawi’s extraordinary turnaround — one with broad implications for hunger-fighting methods across Africa — with one word: fertilizer.