In Nigeria, agriculture has remained the largest sector of the economy. It generates employment for about 70% of Nigeria’s population and contributes about 40% to the Gross Domestic Product (GDP) with crops accounting for 80%, livestock 13%, forestry 3% and fishery 4%. It plays significant roles in the nation’s economic development. These roles include: contribution to the country’s gross domestic product; source of income and decent living for a large proportion of the population; provision of adequate food for the people; supply of raw materials required by the industrial sector; generation of foreign exchange through export; provision of employment opportunities for the teeming population.