English settlers soon came into conflict with the natives. Despite some successful interaction, issues of ownership and control of land and other resources, and trust between the peoples, became areas of conflict. Virginia has drought conditions an average of every three years. The colonists did not understand that the natives were ill-prepared to feed them during hard times. In the years after 1612, the colonists cleared land to farm export tobacco, their crucial cash crop. As tobacco exhausted the soil, the settlers continually needed to clear more land for replacement. This reduced the wooded land which Native Americans depended on for hunting to supplement their food crops. As more colonists arrived, they wanted more land.