Beginning in 1998, a long-term organic crop rotation experiment was initiated at the Southeast Research Farm (SERF) to examine the effects of organic practices on crop yields, soil quality, and grain quality. Because a soilbuilding crop rotation is required for certified organic crop production, organic fields at the SERF follow a rotation of corn-soybean-barley/red clover. In addition to the use of certified organic practices at this site, we have used organic seed in this experiment, as the National Organic Program (NOP) requires that organic farmers source organic seed. Results reported here represent the seventh year of production, which includes two cycles of the three-year crop rotation.