Basis is used in the grain marketing industry as a guide in making all grain marketing decisions. Historical basis records for given geographical locations should be updated periodically. The historical basis record for the most recent three to five year period is necessary to effect grain marketing decisions. This publication updates the historical basis record for corn, soybeans, and wheat for the 1999/00 to 2003/04 Marketing Years. The following can be used in effecting current grain marketing decisions: - Five-year average basis table summaries for Northern and Southern Eastern Shore Corn can be found on pages 18 and 24. Corresponding graphical illustrations are given on pages 59 and 65. - Five-year average basis table summaries for Northern and Southern Eastern Shore Soybeans can be found on pages 30 and 36. Corresponding graphical illustrations are given on pages 71 and 77. - Five-year average basis table summaries for Northern and Southern Eastern Shore Wheat can be found on pages 42 and 48. Corresponding graphical illustrations are given on pages 83 and 89.