The United States has a moral duty to slash its farm subsidies even if developing countries do not reciprocate by opening their markets to more U.S. farm goods, officials with a leading private sector development group said last Thursday. The United States is under pressure in world trade talks to reduce the billions of dollars in subsidies it pays to farmers each year. Leading U.S. farm groups have vowed to fight such an agreement unless developing countries reduce their tariffs to allow in more agricultural imports.