An Artificial Intelligence Approach to Manage Crop Water Requirements in South Africa
Table 4.
Estimated Crop water requirement ofpotatoes in WIS using CROPWAT model
| Month | Decade | Stage | Kc?coefficient | ETc (mm/day) | ETc (mm/dec) | Pe (mm/dec) | Irrigation Requirement (mm/dec) | | April | 1 | Initial | 0.45 | 3.81 | 3.81 | 3.1 | 35.0 | | April | 2 | Initial | 0.45 | 3.60 | 3.60 | 0.0 | 36.0 | | April | 3 | Initial | 0.45 | 3.48 | 3.48 | 0.6 | 34.2 | | May | 1 | Deve | 0.69 | 5.13 | 5.13 | 3.7 | 47.6 | | May | 2 | Deve | 1.12 | 8.04 | 8.04 | 4.9 | 75.5 | | May | 3 | Deve | 1.57 | 10.40 | 114.4 | 3.3 | 111.1 | | June | 1 | Mid | 1.93 | 11.44 | 114.4 | 0.3 | 114.2 | | June | 2 | Mid | 1.95 | 10.36 | 103.6 | 0.0 | 103.6 | | June | 3 | Mid | 1.95 | 10.69 | 106.9 | 0.0 | 106.8 | | July | 1 | Mid | 1.95 | 10.88 | 108.8 | 0.0 | 108.8 | | July | 2 | Mid | 1.95 | 10.95 | 109.5 | 0.0 | 109.5 | | July | 3 | Late | 1.87 | 11.94 | 131.3 | 0.1 | 131.2 | | August | 1 | Late | 1.52 | 11.13 | 111.3 | 9.6 | 101.6 | | August | 2 | Late | 1.17 | 9.45 | 94.5 | 14.4 | 80.1 | | August | 3 | Late | 0.94 | 7.99 | 24.0 | 3.3 | 18.0 | | Total | | | | | 1259.2 | 43.2 | 1213.2 | *mm/dec = millimeters per decade (10 days)
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*mm/dec = millimeters per decade (10 days) |
