Cash Crops By Mrs. Myers Period: Jan 3, 1600 to Jan 3, 1760 Cashing in on Crops Jan 3, 1612 Tobacco became a cash crop in Virginia Jan 3, 1619 Twenty Africans were sold in Jamestown to work in the fields Jan 3, 1664 Maryland passed a law that made slavery illegal Jan 3, 1670 Virginia and Maryland had the largest populations of enslaved persons in the colonies Jan 3, 1700 Enslaved persons made up 22 percent of the population of Virginia and Maryland. Jan 3, 1705 Virginia law made all enslaved persons property. Jan 3, 1710 More than twice as many Africans arrive in colonial America between 1700 and 1710 than in all of the 1600s. Jan 3, 1750 31 percent of Marylanders were enslaved people. Jan 3, 1760 During this time, Virginia and Maryland grew more than 100 million pounds of tobacco a year.