Cereals are generally of the gramineous family and, in the FAO concept, refer tocrops harvested for dry grain only. They provide a fair amount of vitamins, minerals and other dietary fibers. Crops harvested green for forage, silage or grazingare classified as fodder crops. Also excluded are industrial crops, e.g. broom sorghum (Crude organic materials nes) and sweet sorghum when grown for syrup (Sugar crops nes). They are being used in making breads, tortillas, oats and other fiber rich eating products. Their grasses are being used as animal fodder and raising livestock. Different cereals are cultivated in different regions of world according to their temperature, soil and water requirements. Cereals are identified according to their genus. However, when two or more genera are sown and harvested as a mixture they should be classified and reported as "mixed grains". They are being used for different purposes also, as using their by-products in different industries as these days in biofuel processing industries also. Cereal products derive either from the processing of grain through one or more mechanical or chemical operations, or from the processing of flour, meal or starch. Each cereal product is listed after the cereal from which it is derived..