Many agriculture ETFs have substantial exposure to wheat, corn and soybeans. For example, the largest sector allocations for iPath Dow Jones AIG-Agriculture ETN (NYSEArca: JJA) are soybeans (25%), corn (24%) and wheat (15%).

However, if fears about the European debt crisis are eased over the next few months, grain commodity prices may rebound sooner than expected. Additionally, if there is strong global growth in early 2012 these commodity prices may rise. When commodity prices stabilize, investing in agriculture ETFs can offer investors a great way to diversify a portfolio and add exposure to commodities. [Agriculture ETFs Can Grow a Portfolio]

ELEMENTS Rogers International Commodity Agriculture ETN

August Koster contributed to this article.