| 原始变量 | 第一主成分F1 | 第二主成分F2 |
| Precipitation (X1) | −0.781 | 0.490 |
| Minimum Temperature (X2) | 0.796 | 0.325 |
| Mean Temperature (X3) | 0.949 | 0.157 |
| Maximum Temperature (X4) | 0.991 | 0.023 |
| Reference Crop Evapotranspiration (X5) | 0.925 | −0.192 |
| Area (X6) | 0.058 | 0.973 |
| Production (X7) | 0.076 | 0.963 |