RELATIONSHIP BETWEEN RAINFALL AND TEMPERATURE VARIABILITY AND THE YIELDS OF SELECTED GRAIN CROPS IN SOKOTO STATE, NIGERIA

E. Ikpe, B. A. Sawa, J. D. Ariko, A. I. Abdulhamid, B. Akpu

Abstract



This study assessed the relationship between rainfall and temperature variability and the yield of selected grain crops in Sokoto State, Nigeria. The study design involved the collection and analyses of annual rainfall, temperature and yield data for millet, maize and sorghum for 48 years (1970 – 2017) for Sokoto State. The rainfall and temperature data were used to characterize the climate of the study area and to show the relationship between weather parameters and the yield of millet, maize and sorghum. The data were analysed using trend line equations and correlation (r) analysis. The result in the yield pattern of millet, maize and sorghum showed an increase. The result of the correlation showed that there is an insignificant, negative relationship between total annual rainfall and the yield of millet, sorghum and maize in the study area (r = -0.130, - 0.176 and -0.270, respectively). The result further showed a negative relationship between onset dates of rainfall with millet and maize yield (r = -0.187 and -0.112, respectively). Based on the findings of the study, major recommendations made include the adequate provision of improved seed varieties that require less consumptive use of moisture and have a shorter growing season and encouraging grain farmers to adopt viable adaptation strategies in the study area.

Keywords


Farmers, Rainfall, Temperature, Variability, Yield

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