Item | Year | Ten-year mean | Highest | Lowest | (Highest − Mean)/ mean % | (Mean − Lowest)/ mean % | Change Index % |
Rainfall (mm) | 1954-1963 1964-1973 | 536.8 474.6 | 582.4 531.8 | 410.0 364.8 | 8.5 10.4 | 23.4 31.2 | 31.9 41.6 |
Yield (kg/hm2) | 1954-1963 1964-1973 | 2156.3 2265.9 | 3217 3056 | 1116 1149 | 49.0 34.9 | 48.3 49.2 | 97.3 84.1 |