Sticky rice is a staple food and has cultural and religious significance to the Lao people. Sticky rice is generally preferred over jasmine rice, and sticky rice cultivation and production is thought to have originated in Laos. There are many traditions and rituals associated with rice production in different environments and among many ethnic groups. For example, Khammu farmers in Luang Prabang plant the rice variety ''khao kam'' in small quantities near the farm house in memory of dead parents, or at the edge of the rice field to indicate that parents are still alive.