Table 7. Crop water requirement for grape.
| Month | Decade | Stage | Kc | ETc | ETc | Eff rain | Irr. Req. |
|---|---|---|---|---|---|---|---|
| coeff | mm/day | mm/dec | mm/dec | mm/dec | |||
| March | 2 | Init | 0.63 | 1.3 | 7.9 | 14.4 | 0.0 |
| March | 3 | Init | 0.63 | 1.6 | 17.1 | 21.3 | 0.0 |
| April | 1 | Deve | 0.64 | 1.8 | 18.2 | 18.1 | 0.1 |
| April | 2 | Deve | 0.68 | 2.2 | 22.0 | 15.6 | 6.4 |
| April | 3 | Deve | 0.72 | 2.7 | 26.8 | 14.0 | 12.8 |
| May | 1 | Deve | 0.77 | 3.2 | 32.1 | 12.7 | 19.4 |
| May | 2 | Deve | 0.81 | 3.8 | 37.8 | 11.2 | 26.6 |
| May | 3 | Mid | 0.86 | 4.5 | 49.7 | 8.1 | 41.6 |
| June | 1 | Mid | 0.87 | 5.1 | 51.3 | 4.2 | 47.1 |
| June | 2 | Mid | 0.87 | 5.7 | 56.7 | 1.0 | 55.7 |
| June | 3 | Mid | 0.87 | 6.0 | 59.7 | 0.9 | 58.8 |
| July | 1 | Mid | 0.87 | 6.4 | 63.8 | 1.0 | 62.8 |
| July | 2 | Mid | 0.87 | 6.7 | 67.3 | 0.6 | 66.8 |
| July | 3 | Mid | 0.87 | 6.4 | 70.7 | 0.5 | 70.2 |
| August | 1 | Mid | 0.87 | 6.1 | 61.2 | 0.4 | 60.8 |
| August | 2 | Mid | 0.87 | 5.9 | 59.0 | 0.3 | 58.7 |
| August | 3 | Late | 0.83 | 5.1 | 55.8 | 0.4 | 55.4 |
| September | 1 | Late | 0.76 | 4.1 | 41.1 | 0.1 | 41.0 |
| September | 2 | Late | 0.69 | 3.3 | 33.1 | 0.0 | 33.1 |
| September | 3 | Late | 0.62 | 2.5 | 25.4 | 2.0 | 23.4 |
| October | 1 | Late | 0.56 | 1.9 | 18.8 | 8.3 | 10.5 |
| October | 2 | Late | 0.49 | 1.3 | 13.0 | 12.1 | 0.9 |
| October | 3 | Late | 0.44 | 1.0 | 4.0 | 5.2 | 0.0 |
| 892.4 | 152.5 | 752 |