| Rate of Improvement in WUE | Irrigation Type | Bangladesh | India | Nepal | Pakistan | Sri Lanka | Rest of South Asia |
| 10% | Irrigated area | 267.6 | 5502.7 | 87.2 | 544.0 | 20.3 | 125.7 |
| Rainfed area | −326.2 | −6193.1 | −92.0 | −556.0 | −20.7 | −138.0 | |
| Total | −58.7 | −690.4 | −4.8 | −11.9 | −0.4 | −12.3 | |
| 20% | Irrigated area | 533.2 | 11030.8 | 163.8 | 1083.3 | 32.8 | 250.1 |
| Rainfed area | −651.9 | −12374.3 | −171.5 | −1084.3 | −33.6 | −270.9 | |
| Total | −118.7 | −1343.5 | −7.7 | −1.1 | −0.8 | −20.8 | |
| 30% | Irrigated area | 800.7 | 16363.4 | 203.9 | 1608.6 | 40.7 | 364.0 |
| Rainfed area | −981.1 | −18325.0 | −213.5 | −1576.4 | −41.8 | −389.2 | |
| Total | −180.4 | −1961.6 | −9.6 | 32.1 | −1.1 | −25.2 | |
| 40% | Irrigated area | 1085.8 | 21443.5 | 210.2 | 2084.7 | 45.9 | 434.7 |
| Rainfed area | −1330.0 | −23988.8 | −221.6 | −1990.1 | −47.2 | −461.5 | |
| Total | −244.2 | −2545.3 | −11.4 | 94.6 | −1.3 | −26.8 |