The biggest sources for the domestic slave trade were "exporting" states in the Upper South such as Virginia, North Carolina, Maryland, and Kentucky. From these states most slaves were imported into South Carolina, Georgia, Alabama, Mississippi, Louisiana, and Arkansas. Fogel and Engelman attribute the larger proportion of interregional slave migration (i.e. migration not due to slave trade) to movement as planters relocated their entire slave populations to the Deep South to develop new plantations or take over existing ones (in later years). The new lands in the South attracted many land hungry settlers.