This article originally appeared in Inc Magazine. Warren Weiss of Foundation Capital put it best when he told The Wall Street Journal: "Agriculture and water are probably the two biggest markets in the world. Everybody's got to eat." Sure enough, the World Bank reports that more than 30 percent of the global workforce relies on agriculture for income. The market is far from saturated, but has slowly attracted more interest from venture capital funds. Here are nine start-ups we're watching: