Explanatory variable | Function |
Upland rice area (ha) | 1.479 |
Upland rice plots (plots) | −1.017 |
Productivity (kg per ha) | 0.815 |
Annual production (kg) | −0.984 |
Rice shortage (months) | −0.165 |
Farming technique (5 levels) | 0.149 |
Farming water (5 levels) | −0.406 |