Excerpts from the report: Since World War II there has been a large expansion in total domestic waterborne traffic. The purpose of this study of changes in the waterborne movement of agricultural commodities and farm supplies between 1949 and 1957 is to (1) supplement previous studies on rail and truck movement of agricultural commodities , (2) form a basis for future research on water transportation of these products, and (3) identify significant aspects of domestic water transportation that may merit more intensive investigation because of their impact on other modes of agricultural transportation. The basic data in the report were drawn from Domestic Waterborne Commerce of the United States, published by the U. S. Corps of Engineers, Department of the Army.