Agriculture offers a solid way to gain exposure to what the investment community calls "emerging markets," and the even less developed, "frontier markets." Emerging markets, like Brazil,  are attractive to investors due to their rapid economic growth and industrialization. Frontier markets have lower market capitalization and liquidity than the more developed, emerging markets. Though these definitions aren't universally agreed upon, the investment research firm MSCI has defined these categories and routinely updates their index to reflect the relative status of each country.