About 15,000 sq. kms. in area, Kargil district has an agrarian population of approximately 120,000 people, who cultivate the land, along the course of the drainage system, wherever artificial irrigation from mountain streams is possible. About 85 % are Muslims, mainly of the Shia sect, Islam having been introduced to the original Buddhist population around the middle of the 16th century by missionaries from Kashmir and Central Asia. Their descendants, locally titled Agha, are mostly religious scholars who continue to hold sway over the population, even as the age-old traditions of Buddhist and animistic origin are discernible in the culture. Many elements of the ancient supernatural belief systems, especially many traditions connected with agricultural practices, are still followed with subdued reverence.