A worker uses a machine to cut rice on a test field sewn with different rice varieties in the outskirts of Kunming, capital of southwestern China's Yunnan province, Tuesday, Oct. 14, 2008. In a mountainous place like Yunnan, and in many other parts of the developing world, such advantages can tip the balance between hunger and a decent living. After years of research in places like Yunnan and others, China is now on the verge of putting crops with such attributes on the market, experts say. (AP Photo/Andy Wong)