The Hausa constitute the largest ethnic group in West Africa. The term "Hausa" actually refers to the language and, by extension, to its native speakers, of whom there are about 25 million. Agriculture is the main economic activity. Grain is the staple diet, including Guinea corn, millet, maize, and rice. The Hausa also grow and eat root crops and a variety of vegetables. Cotton and peanuts are processed and used locally, but part of the harvest is exported. The Hausa practice intercropping and double-cropping; their main implement is the hoe. The Cattle Fulani provide the Hausa with meat, yogurt, and butter. Men's crafts include tanning, leather-working, saddling, weaving, dying, woodworking, and smithing. Iron