Climate Dynamics, Fertilizer use, and Cassava Output in Nigeria: A Four-Decade Trend Analysis (1980 – 2023)

This study investigated the trends in climatic variables, fertilizer use, and cassava production in Nigeria from 1980 to 2023, utilizing exponential trend analysis on secondary data sourced from the Food and Agriculture Organization (FAO) statistics, the World Bank database, the National Bureau of Statistics (NBS), and the Nigerian Meteorological Agency (NiMet). Results indicated a slight but significant decline in rainfall (β = -0.0021, p < 0.01) and cassava yield (β = -0.0094, p < 0.01), alongside significant temperature increases (β = 0.0037, p < 0.01), relative humidity (β = 0.0027, p < 0.01), solar radiation (β = 0.0154, p < 0.01), cultivated land area for cassava (β = 0.0052, p < 0.01), and labour force involved in cassava production (β = 0.2599, p < 0.01). Fertilizer use showed a negative but statistically insignificant trend (β = -0.0392, p > 0.05). These findings suggest that, despite increasing land and labour inputs, as well as expanding solar radiation and humidity, cassava yields are declining, likely due to decreasing rainfall, rising temperatures, and inadequate fertilizer application. The study concluded that climate variability, coupled with limited technological adoption as exemplified in low fertilizer use, threatens cassava productivity in Nigeria. It recommends urgent investment in climate-smart agricultural practices, enhanced access to fertilizers, and the promotion of drought- and heat-tolerant cassava varieties to bolster resilience and sustain production.

Cassava output, climate variability, fertilizer use

1. Adejuwon, S.A. (2004). Impacts of Climate Variability and Climate Change on Crop Yield in Nigeria. Lead Paper Presented to the Stakeholders. Workshop on Assessment of Impacts and Adaptation to Climate Change, Conference Center, Obafemi Awolowo University, Ile-Ife, 20-21 September 2004. [Google Scholar] [Crossref]

2. Adofu I., Abula M., and Audu S.I. (2010). An assessment of the effects of interest rate deregulation in enhancing agricultural productivity in Nigeria. Current Research Journal of Economic Theory 2(2): 82-86, [Google Scholar] [Crossref]

3. Agba, D. Z., Adewara, S. O., Adama, J. I., Adzer, K. T., Atoyebi, G. O. (2017). Analysis of the Effects of Climate Change on Crop Output in Nigeria. American Journal of Climate Change. 6, 554 – 571. DOI: 10.4236/ajcc.. 2017.63028 [Google Scholar] [Crossref]

4. Ajayi, JO (2014). Comparative Economic Study of Mixed and Sole Cassava Cropping Systems in Nigeria. J. Agris online Papers in Economics and Informatics, 6 (4): 15-23 [Google Scholar] [Crossref]

5. Ajetombi, J. and A. Abiodun (2010). Climate Change Impacts on Cowpea Productivity in Nigeria. African Journal of Food, Agriculture, Nutrition and Development, 10(1): 2258-2271. [Google Scholar] [Crossref]

6. Akande, A. et al., (2017). Geospatial Analysis of Extreme Weather Events in Nigeria (1985–2015) Using Self-Organizing Maps. Advances in Meteorology. https://doi.org/10.1155/2017/8576150 [Google Scholar] [Crossref]

7. Akanmu, Adejare & Johnson (2016). How effective is the Nigerian senior school agricultural science curriculum? A survey of Evidence from content development to product. European Scientific Journal February 2016 edition, 2, No.4 [Google Scholar] [Crossref]

8. Akinniran, T. N., Ezekiel, A. A., Ganiyu, M.O., and Adeyemo, S. A. (2013). Effect of Rainfall Variability on Crop Production in Oyo State, Nigeria (1990 - 2009). International Journal of Scientific and Engineering Research, 4 (9), 1737 – 1745. [Google Scholar] [Crossref]

9. Akomolafe, K. J., Awoyemi, O. B and Babatunde, A. (2018). Climate Change and Its Effects on Agricultural Outputs in Nigeria. Asian Journal of Agricultural Extension, Economics and Sociology, 25 (2), 1 – 11. [Google Scholar] [Crossref]

10. Alehile, K.S. (2023). Climate Change Effects on Employment in Nigeria’s Agricultural Sector. Chinese Journal of Urban and Environmental Studies Vol. 11, No. 3, 1-24. [Google Scholar] [Crossref]

11. Allem, A.C. (2002), “The origins and taxonomy of cassava”, Chapter 1, in: Hillocks, R.J., J.M. Thresh and A.C. Bellotti (eds.), Cassava: Biology, Production and Utilization, CABI, Wallingford, United Kingdom, 1-16, http://ciatlibrary. ciat.cgiar.org/Articulos_Ciat/cabi_04ch1.pdf. [Google Scholar] [Crossref]

12. Alves, A. A. C., & Setter, T. L. (2016). Response of cassava to water deficit: from the whole plant to the cellular level. Field Crops Research, 186, 24-34. [Google Scholar] [Crossref]

13. Alves, A. A. C., & Setter, T. L. (2016). Response of cassava to water deficit: from the whole plant to the cellular level. Field Crops Research, 186, 24-34. [Google Scholar] [Crossref]

14. Amanchukwu, R. N. et al. (2015). Climate change education in Nigeria: The role of curriculum review. Education, 5(3): 71 79. [Google Scholar] [Crossref]

15. Anabaraonye, B., (2019). Educating farmers and fishermen in rural areas in Nigeria on climate change mitigation and adaptation for global sustainability. International Journal of Scientific & Engineering Research, 10(4), 1391-1398. [Google Scholar] [Crossref]

16. Asare, P. A., Osei, E. K., & Agyarko, K. (2017). Effect of planting methods and nitrogen fertilizer on yield and yield components of cassava (Manihot esculenta Crantz) in the semi-deciduous forest zone of Ghana. Soil Use and Management, 33(1), 131-139. [Google Scholar] [Crossref]

17. BBC News (2023). Nigeria floods: 'Overwhelming' disaster leaves more than 600 people dead. Retrieved (16-10-2023) from https://www.bbc.com/news/world-africa-63280518 [Google Scholar] [Crossref]

18. Bentley, J., A. Olanrewaju, T. Madu, O. Olaosebikan, T. Abdoulaye, T. Wossen, V. Manyong, et al. 2017. Cassava farmers' preferences for varieties and seed dissemination system in Nigeria: gender and regional perspectives. IITA Monograph, Ibadan: IITA Monograph 90p. https://cgspace.cgiar.org/handle/10568/80554?show=full [Google Scholar] [Crossref]

19. Biratu, G.K. (2018). Integrated soil fertility management options to improve cassava (manihot esculenta Crantz) productivity in Zambia, in: Center for Environmental Science, Addis Ababa University, Addis Ababa, Ethiopia, 2018. [Google Scholar] [Crossref]

20. BlueSense (2023). Cassava production in Nigeria. Retrieved (31 09 2023) from https://www.linkedin.com/pulse/nigeria-biggest-cassava-producer-world-why-isnt-cashing-global [Google Scholar] [Crossref]

21. BNRCC (2011). National adaptation strategy and plan of action on climate change for Nigeria (NASPA-CCN). Prepared for the Federal Ministry of Environment Special Climate Change Unit. [Google Scholar] [Crossref]

22. Butu, H., M., Okeke, C., U., and Okereke, C. (2023). Climate Change Adaptation in Nigeria: Strategies, Initiatives, and Practices. Working Paper No. 3. APRI: Berlin, Germany. [Google Scholar] [Crossref]

23. Chikezie, C. Ibekwe, U. C., Ohajianya, D. O., Orebiyi, J. S., Ehirim, N. C., Henri-Ukoha, A., Nwaiwu, I. U. O., Ajah, E. A., Essien, U. A., Anthony, G and Oshaji, I. O. (2015). Effect of Climate Change on Food Crop Production in Southeast Nigeria: A Co-integration Model Approach. International Journal of Weather, Climate Change and Conservation Research, 2 (1), 47 – 56. [Google Scholar] [Crossref]

24. Chikowo, R., Mapfumo, P., Nyamugafata, P., & Giller, K. E. (2016). Maize yield response to conservation agriculture practices and nitrogen fertilizer in Southern Africa. Field Crops Research, 198, 173-181. [Google Scholar] [Crossref]

25. Chikowo, R., Mapfumo, P., Nyamugafata, P., & Giller, K. E. (2016). Maize yield response to conservation agriculture practices and nitrogen fertilizer in Southern Africa. Field Crops Research, 198, 173-181. [Google Scholar] [Crossref]

26. Chikowo, R., Mapfumo, P., Nyamugafata, P., & Giller, K. E. (2016). Maize yield response to conservation agriculture practices and nitrogen fertilizer in Southern Africa. Field Crops Research, 198, 173-181. [Google Scholar] [Crossref]

27. Dioha, M. O. and Emodi, N. V. (2018). Energy-climate dilemma in Nigeria: Options for the future. IAEE Energy Forum. [Google Scholar] [Crossref]

28. Dixon A. G. O. and Ssemakula G. (2008). Prospects for cassava breeding in Sub-Saharan Africa in the next decade. Journal of Food, Agriculture & Environment Vol.6 (3&4) [Google Scholar] [Crossref]

29. Dixon, R. U., et al. (2010). Improved Cassava Variety Handbook. Ibadan, Nigeria: International Institute of Tropical Agriculture [Google Scholar] [Crossref]

30. Ebele, N. E. and Emodi, N. V. (2016). Climate change and its impact on the Nigerian economy. Journal of Scientific Research & Reports, 10(6), 1-13. http://www.journaljsrr.com/index.php/JSRR/article/view/21917/40737 [Google Scholar] [Crossref]

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