A corncob is the central core of a maize (Zea mays ssp. mays L.) ear. Young ears, also called baby corn, can be consumed raw, but as the plant matures the cob becomes tougher until only the kernels are edible. When harvesting corn the corncob is collected as part of the ear, leaving the corn stover in the field. The corn plant's ear is also considered a "cob" or "pole" but it is not fully a "pole" until the ear is shucked, or removed from the plant material around the ear. Every row of corn on a corncob has the same number of kernels. Corncobs are an important source of the furfural, an aromatic aldehyde used in a wide variety of industrial processes. Although with little nutritious value, corncobs can be used as fiber in ruminant fodder. Corncobs can be used to make smoking pipes. Over many years corncobs can also be made into charcoal.