Root crops, tuber crops, and corm crops are special terms used to refer to specific types of farm crops collectively called root and tuber crops.
The starchy root and tuber crops also called roots and tubers and tuberous crops, are plants that are grown for their modified, thickened root or stem which generally develop underground.
These organs are rich in carbohydrates and are commonly used as staples, livestock feed, or as raw materials for the production of industrial products such as starch and alcohol, or processed into various food products.
Starch is a storage product of photosynthesis and is a direct source of energy for animals.
With the aid of glycosidase enzymes, animals hydrolyze the starch to glucose.
Starch occurs in plant tissues as starch grains and is composed of two polysaccharides, amylose and amylopectin (Carey, 1992; Devlin, 1975).