Potentially, the more immediate impact of the value of the U.S. dollar against the currencies of other exporting countries is on the planting decisions of farmers.Grain and soy futures prices have always been affected by what we might call external influences, which in this case refer to factors other than those that make up the usual fundamental supply/demand and technical analyses performed by market analysts. There is a wide variety of external economic and political elements that can have a direct or indirect impact, which in turn may affect potential supplies and demand. This has always been true. Back in the decades when PL 480 aid shipments were a major part of U.S. grain exports, foreign policy considerations often influenced which...