International Journal of Agriculture and Earth Science (IJAES )

E- ISSN 2489-0081
P- ISSN 2695-1894
VOL. 11 NO. 1 2025
DOI: 10.56201/ijaes.vol.11.no1.2025.pg87.100


An Empirical Investigation of the Relationship between Agricultural Inputs and Agricultural Output in Nigeria

Dr Ezebunwo NYECHE, Dr Kingsley Nnana ODUNGWERU and Dr Elvis Ozulem Wokekoro


Abstract


This study examines the relationship between agricultural inputs and agricultural output in Nigeria from 1990 to 2022, utilizing time series data sourced from the World Development Indicators and the CBN Statistical Bulletin. The specific objectives were to analyze the impact of agricultural expenditure, fertilizer consumption, and arable land proxies for agricultural inputs on crop production proxy for agricultural output in Nigeria. The data analysis techniques employed include descriptive statistics, unit root tests, bounds cointegration, the autoregressive distributed lag (ARDL) estimation method, and residual diagnostics tests. The ADF unit root tests reveal a mix of I(1) and I(0) series, indicating that the variables differ in their levels of integration. Evidence of cointegration was established, suggesting a long-term equilibrium relationship among the variables. The ARDL results indicate that agricultural expenditure has a significant positive effect on crop production in Nigeria, revealing that a unit increase in agricultural expenditure increases crop production; access to arable land has a positive significant effect on crop production, indicating that an increase in access to arable land increases crop production in Nigeria. Furthermore, the results show that fertilizers consumption has a positive and statistically significant effect on crop production in Nigeria. This suggests that a unit increase in fertilizers consumption increases crop production in Nigeria. Owing to the findings, this study concludes that agricultural expenditure, access to arable land and fertilizer consumption enhances crop production of the Nigerian economy. Thus, it is recommended among others that Policymakers, should implement sustained and targeted agricultural expenditure programs focused on infrastructure, research, and farmer access to arable land to ensure long-term productivity growth.


keywords:

Agricultural Expenditure, Arable Land, Fertilizers consumption, Crop Production,


References:


Adeboye, A. S., Ojo, J. A., & Akinmoladun, J. K. (2023). Land management and agricultural

productivity in Nigeria: Challenges and prospects. Journal of Agricultural Science, 15(2),

45-60.
Adetunji, M. A. (2011). Fertilizer consumption and food production in Nigeria: An empirical

analysis. Journal of Agricultural Economics, 56(2), 234-250.
Akpan, U. (2012). Government expenditure and agricultural production in Nigeria: Implications

for economic development. Journal of African Development, 14(1), 120-132.
Baanante, C. A., & Bumb, B. L. (1996). The impact of fertilizer subsidies on crop production in

developing countries. Agricultural Economics, 15(1), 27-39.
Binswanger, H. P., & Deininger, K. (1997). Explaining agricultural and aggregate productivity

growth in developing countries. Journal of Development Economics, 53(2), 277-291.
Binswanger-Mkhize, H. P. (2012). The changing role of the state in agricultural development: A

review of the evidence. World Bank Policy Research Working Paper, 6195.
Chen, X., Xu, M., & Li, L. (2021). Fertilizer management and its impact on crop production: A

review. Agronomy for Sustainable Development, 41(3), 18.
Cobb, C. W., & Douglas, P. H. (1928). A theory of production. The American Economic Review,

18(1), 139-165.
Deininger, K., & Olinto, P. (2000). Land reform in Brazil: Past, present, and future. In E. L. Schafft

& B. S. Nelson (Eds.), Land policies and their outcomes (pp. 65-92). Routledge.
Fan, S., Zhang, X., & Zhang, L. (2000). Public spending in developing countries: New evidence

on the impact of agricultural and rural development expenditures. Environment and

Development Economics, 5(2), 305-316.
Fan, S., Zhang, X., & Zhang, L. (2023). Arable land expansion and crop production: A review of

recent evidence. Agricultural Economics, 54(2), 231-248.
FAO. (2022). The state of the world's land and water resources for food and agriculture: Systems

at breaking point. Food and Agriculture Organization of the United Nations.
FAO. (2023). FAOSTAT statistical database. Food and Agriculture Organization of the United

Nations. Retrieved from http://www.fao.org/faostat



Hayami, Y., & Ruttan, V. W. (1985). Agricultural development: An international perspective. Johns

Hopkins University Press.
Ibrahim, M., Usman, M., & Bako, G. (2023). Fertilizer use efficiency and crop productivity in

Nigeria: An empirical analysis. International Journal of Agriculture and Rural

Development, 30(4), 215-228.
Jing, Z., Liu, Y., & Wang, X. (2022). Fertilizer application and crop productivity: Evidence from

a global panel. Field Crops Research, 276, 108-120.
Müller, C., Pugh, T. A., & Cramer, W. (2021). Critical assessment of land use and its effects on

global crop production. Nature Communications, 12, 3339.
Nwosu, C. S., Oguoma, N. N., Ben-Chendo, G. N., & Henri-Ukoha, A. (2012). The impact of

arable land use on agricultural productivity in Nigeria. Global Journal of Agricultural

Sciences, 11(2), 123-132.
Ojo, J. A., Akinbami, J. F., & Alabi, T. A. (2022). Evaluating agricultural expenditure and its

impact on crop yield in Nigeria. Agricultural Economics Review, 18(3), 98-115.
Oluwatayo, I. B., Sekumade, A. B., & Adesoji, S. A. (2008). Resource use efficiency in arable crop

production: A study of farmers in Ekiti State, Nigeria. Research Journal of Agriculture and

Biological Sciences, 4(1), 117-125.
Pingali, P. (1997). Agricultural mechanization and the evolution of farming systems in developing

countries. In D. Byerlee & C. K. Eicher (Eds.), Agricultural development in the Third

World (pp. 193-220). Johns Hopkins University Press.
Ricker-Gilbert, J., & Jayne, T. S. (2017). Do fertilizer subsidies impact crop yields? Evidence from

a large-scale randomized experiment in Malawi. American Journal of Agricultural

Economics, 99(1), 93-109.
Romer, P. M. (1986). Increasing returns and long-run growth. Journal of Political Economy, 94(5),

1002-1037.
Solow, R. M. (1956). A contribution to the theory of economic growth. Quarterly Journal of

Economics, 70(1), 65-94.
Thirtle, C., Lin, L., & Piesse, J. (2003). The impact of research-led agricultural productivity growth

on poverty reduction in Africa, Asia, and Latin America. World Development, 31(12),

1959-1975.



Tilman, D., Balzer, C., Hill, J., & Befort, B. L. (2002). Global food demand and the sustainable

intensification of agriculture. Proceedings of the National Academy of Sciences, 108(50),

20260-20264.
Tilman, D., Cassman, K. G., Matson, P. A., Naylor, R., & Polasky, S. (2002). Agricultural

sustainability and intensive production practices. Nature, 418(6898), 671-677.
Udoh, E. J., & Ogbuagu, E. O. (2013). Public sector investment and agricultural productivity in

Nigeria: An empirical investigation. Journal of Agricultural Science and Technology, 5(6),

823-834.
World Bank. (2022). Nigeria’s agriculture sector: Current status and future prospects. World Bank

Report.
Yusuf, S. A., Abdu, J. O., & Bashir, A. M. (2015). Fertilizer application and crop productivity in

Nigeria: A case study of rice production in selected states. African Journal of Agricultural

Research, 10(5), 436-443.


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