The study examined the effects of rainfall and other factors on rubber yield in Nigeria for the period 1970 to 2012. The methods of analysis employed in the study were mainly error-correction model (ECM) within the context of co-integration theory. The results show that all the variables were not stationary at their levels and thus, they were difference once to attain stationary. Statistical significance of the error-correction term validates the existence of an equilibrium relationship among the variables. Rainfall was most significant, indicating that increase in rainfall will affect rubber yield as this will reduce the number of tapping days of rubber stands. Rubber prices were also found to determine rubber yield in Nigeria. The study therefore recommends that rain guard should be attached to rubber stands during the raining season to prevent the washing away of latex by rain.
Rainfall, rubber yield, co-integration, error correction model, Nigeria
