Table 4 Comparison of crop water use (CWU) estimates for 1990–2015 between our study and Jägermeyr et al.25 for a set of selected crops.
Crop | Average CWU (mm) | Spatial correlation | Median of differences | Historical change (%) | ||
|---|---|---|---|---|---|---|
Our study | Ensemble mean | Our study | Ensemble median | |||
Rainfed | ||||||
Maize | 363 | 351 | 0.90 | +1.8% | +0.2% | −1.3% |
Soya bean | 379 | 352 | 0.83 | +7.0% | −0.5% | −1.5% |
Winter wheat | 314 | 277 | 0.83 | +14.2% | −2.1% | −1.1% |
Spring wheat | 302 | 250 | 0.88 | +18.4% | −0.4% | −2.2% |
Rice main season | 389 | 368 | 0.89 | +6.0% | +0.4% | −0.9% |
Rice second | 327 | 301 | 0.90 | +9.5% | +1.7% | −0.3% |
Average | 0.87 | +9.5% | −0.1% | −1.2% | ||
Irrigated | ||||||
Maize | 460 | 482 | 0.86 | −8.1% | +1.1% | −1.3% |
Soya bean | 479 | 472 | 0.92 | −0.1% | +1.9% | +0.1% |
Winter wheat | 432 | 381 | 0.75 | +4.7% | +0.3% | −0.3% |
Spring wheat | 492 | 373 | 0.61 | +18.7% | +1.8% | −1.7% |
Rice main season | 570 | 436 | 0.65 | +20.7% | +0.1% | −2.0% |
Rice second season | 511 | 381 | 0.67 | +23.8% | −0.7% | −1.8% |
Average | 0.74 | +10.0% | +0.7% | −1.2% | ||
