Open Access Journal of Agricultural Research (OAJAR)

ISSN: 2474-8846

Research Article

Climate Variability and Environmental Quality's Effects on Rice Yield in Nigeria (1971-2012): A Bounds Test for Cointegration Approach

Authors: Onoja AO and Chagwiza C*

DOI: 10.23880/oajar-16000250


The paper determined the effects of climate variability and greenhouse gas emission on rice productivity in Nigeria. Unit root tests were conducted using Philip Perron tests which indicated that the series were mixtures of I(0) & I(1) variables. The ARDL model for cointegration test was then applied in determining the long-run effects of GHG emission and climate variability and change on rice yield. The series' residuals were subjected to cointegration test and other diagnostics required in time series modelling. The estimated F-statistics confirmed the presence of a long-run steady state relationship among the series. On the long-run, the yield of rice in Nigeria was determined by the natural logs of rainfall, CO2 emission, price of rice, pesticide application and arable land area cultivated. The study recommends that programmes to facilitate greener economy, steady supply of water such as agroforestry/afforestation and irrigation promotion as well as supply of pesticides and rice varieties at affordable prices for rice cultivation should be put in place in Nigeria in order to ensure sustainable production of rice in the country. The study provides unique evidence on the effects of climate variability and environmental quality on rice yield in Nigeria.

Keywords: Climate Variability; Environmental Quality; Rice Yield; Nigeria

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