Maize is the third most important cereal crop in India after rice and wheat. It accounts for 9 per cent of total food grain production in the country. There are many varieties of field corn. These can be "dent" or "flint" corns, both of which can also be dried and ground for homemade meal. Flint corn has a hard-shelled kernel and dent corn is somewhat hard-shelled, and the top of the kernel forms a characteristic dented shape when the ears are mature. Maize is cultivated for various purposes including grain, fodder, green cobs, sweet corn, baby corn, popcorn in peri-urban areas. Corn and its by products are also found in many non-food items such as fireworks, rust preventatives, glue, paint, dyes, laundry detergent, soap, aspirin, antibiotics etc.