The patrilineal Luba of Shaba differ in their descent system from the Eastern Luba by their culture and language, they are distinct from the Western Luba. Most live in southern Zaire. The Luba practice slash-and-burn agriculture; fields are abandoned after a few seasons. The most cultivated plants are cassava and maize; to a lesser extent, one also finds sweet potatoes, peanuts, tomatoes, onions, beans, cucumbers, tobacco, and sesame. Millet and sorghum are now mainly used for brewing beer.