Rice is cultivated primarily for it's grain, which is an important part of the diet in Asian counties.
Rice bran contains 15 to 17% oil, and is a source of vitamin B. Fermented or Sierra rice is consumed in the Andean highlands and is used exclusively there in the preparation of dry rice. Rice hulls are sometimes used in the production of purified alpha cellulose and furfural. Rice straw is used as roofing and packing material, feed, fertilizer, and fuel.
Rice is native to the tropics and subtropics of Southeast Asia. Almost 90% of the world's rice production is only from Asia as China and India being the largest producers.