Corn is called maize by most countries, this comes from the Spanish word 'maiz'. Corn is a cereal crop that is part of the grass family. An ear or cob of corn is actually part ofthe flower and an individual kernel is a seed. On average an ear of corn has 800 kernels in 16 rows. Corn will always have an even number of rows on each cob. A bushel is a unit of measure for volumes of dry commodities such as shelled corn kernels. 1 Bushel of corn is equal to 8 gallons.