Table 3.
Multi-linear regression between pod yield and several explanatory variables: total water uptake, transpiration efficiency, and the harvest index across environmental conditions (post-rainy and rainy season) and water regimes (water stress, WS and well-watered, WW).
| Factors | Coefficient | SE | t-value | P > t |
|---|---|---|---|---|
| Post-rainy season − WW − R2 = 0.81 | ||||
| Total water extracted | 0.00059 | 0.00004 | 14.3 | 0.000 |
| Transpiration efficiency | 5.12 | 0.42 | 12.1 | 0.000 |
| Harvest index | 26.4 | 1.8 | 15.0 | 0.000 |
| Constant | −19.1 | 1.36 | −14.1 | 0.000 |
| Post-rainy season − WS − R2 = 0.95 | ||||
| Total water extracted | 0.00014 | 0.00004 | 3.91 | 0.000 |
| Transpiration efficiency | 2.71 | 0.12 | 21.9 | 0.000 |
| Harvest index | 20.4 | 0.49 | 41.3 | 0.000 |
| Constant | −5.51 | 0.61 | −9.1 | 0.000 |
| Rainy season − WS − R2 = 0.97 | ||||
| Total water extracted | 0.00016 | 0.00003 | 6.1 | 0.000 |
| Transpiration efficiency | 1.84 | 0.09 | 19.7 | 0.000 |
| Harvest index | 21.4 | 0.22 | 96.0 | 0.000 |
| Constant | −5.2 | 0.32 | −16.2 | 0.000 |