Each day two 20,000-ton freighters loaded with grain leave the United States for the Soviet Union. This flow of grain between two major adversaries is influenced by economic considerations such as the size of the Soviet grain deficit, the U.S. capacity to supply, and the Soviet ability to pay. Political considerations include the risk to both trading partners of such a heavy interdependence, whether as supplier or market.

Never before has a country dominated the world grain trade as the United States does today. Its 55 per cent share of world grain exports in 1981 easily overshadows Saudi Arabia's 24 per cent share of world oil exports in 1978. And while the amount of oil traded internationally has been falling since 1979, grain shipments are continuing to grow.