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When the food crisis began several years ago, with soaring prices and supply shortages, governments agreed to invest much more in agriculture. And with predictions of a global population of nine billion by 2050, the need for more food has become increasingly urgent. But some say food security cannot be achieved unless trade barriers are removed.
    The Global Harvest Initiative says improving food and agricultural trade flows in the coming decades will help counter the effects of changing weather patterns, population shifts and limited natural resources. The initiative began in 2009 with a partnership of big business, including Archer Daniels Midland Company, DuPont, John Deere and Monsanto.
    Katrin Kuhlman is director of TransFarm Africa, also a member of the Global Harvest Initiative. TransFarm Africa is part of the Aspen Institute, which says its core mission is to foster enlightened leadership and open-minded dialogue. Kuhlman said dropping trade barriers opens markets and gives farmers more incentives to produce.
    But negotiating trade deals is often difficult. The Doha Round of World Trade Organization trade talks began in 2001. The goal is to lower trade barriers, but progress has been slow. There are major differences between rich and developing nations, including the use of agricultural subsidies.
    Kuhlman says a different approach may be needed to resolve some of those differences.