| 
      
        | Climate variables | Period | Correlation |  
        | Annual    temperature | 1955-2010 | -0.325* |  
        | Annual    rainfall | 1955-2010 | 0.653** |  
        | Annual    heavy rainfall | 1955-2010 | 0.638** |  | 
  
    | **Significant at 99% probability level *Significant at 95% probability level
 | 
  
    | Table 3: Climate Correlation in the NRDBA Area, Nigeria. |