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Abstract
This study investigates impact of agriculture and manufacturing sectors on economic growth in Nigeria from 1981-2017. It examines the causal relationship between agriculture, manufacturing sectors and economic growth in Nigeria which most previous studies have ignored. In achieving this, ordinary least square methods were adopted. The unit root test results show that some of the variables were not integrated at level. The Engle-Granger cointegration test validated by Johansen cointegration test confirmed the existence of long run relationship among the variables. Thus, all the variables tend to move together in the long run. The results revealed that the impact of agriculture and manufacturing sectors on economic growth in Nigeria is significant but not enough to take the country to an enviable level within the period covered. It also indicates that all variables considered possess inherent capacity to contribute to the growth of agriculture and manufacturing if effectively, efficiently and adequately managed. The following recommendations become imperative: there is need for government to create a healthy productive environment by providing security, steady power supply and good road network that will attract and sustain investments in manufacturing sector; the current embargo on the importation of rice and other locally produce goods should be sustained by the federal government in order to increase productivity in agriculture; there is need for government to review the current trade policies to make trade become more inclusive & sustainable to SMEs via access to finance, financial literacy & technological adoption etc.