Table 1 Reference crop evapotranspiration rate (ETo) calculated with CROPWAT V.8.00 computer program from meteorological data under Sharkia Governorate conditions using FAO Penman–Monteith equation according to Ndulue and Ramanathan 2021 (season 2021)
From: Effect of some irrigation systems on water stress levels of Washington navel orange trees
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ETo 100% | 2.17 | 2.73 | 3.69 | 5.24 | 6.76 | 6.79 | 6.77 | 6.27 | 5.05 | 3.89 | 2.75 | 2.07 | |
Crop coefficient | 0.61 | 0.64 | 0.67 | 0.72 | 0.78 | 0.81 | 0.80 | 0.97 | 0.46 | 0.51 | 0.64 | 0.58 | |
ETc 100% | 1.32 | 1.75 | 2.47 | 3.77 | 5.27 | 5.50 | 5.42 | 6.08 | 2.32 | 1.98 | 1.76 | 1.20 | |
W.R (m3/fed./day) | 5.56 | 7.34 | 10.38 | 15.85 | 22.15 | 23.10 | 22.75 | 25.54 | 9.76 | 8.33 | 7.39 | 5.04 | |
W.R (m3/fed. month) | 166.79 | 220.15 | 311.26 | 475.37 | 664.37 | 692.99 | 682.42 | 766.32 | 292.70 | 249.97 | 221.76 | 151.28 | 4895.36 |
ETo 80% | 1.74 | 2.18 | 2.95 | 4.19 | 5.41 | 5.43 | 5.42 | 5.02 | 4.04 | 3.11 | 2.20 | 1.66 | |
ETc 80% | 1.06 | 1.40 | 1.98 | 3.02 | 4.22 | 4.40 | 4.33 | 4.87 | 1.86 | 1.59 | 1.41 | 0.96 | |
W.R (m3/fed./day) | 4.45 | 5.87 | 8.31 | 12.68 | 17.72 | 18.48 | 18.20 | 20.44 | 7.81 | 6.67 | 5.91 | 4.03 | |
W.R (m3/fed. month) | 133.43 | 176.12 | 249.21 | 380.30 | 531.50 | 554.39 | 545.93 | 613.06 | 234.16 | 199.98 | 177.41 | 121.02 | 3916.49 |
ETo 60% | 1.30 | 1.64 | 2.21 | 3.14 | 4.06 | 4.07 | 4.06 | 3.76 | 3.03 | 2.33 | 1.65 | 1.24 | |
ETc 60% | 0.79 | 1.05 | 1.48 | 2.26 | 3.16 | 3.30 | 3.25 | 3.65 | 1.39 | 1.19 | 1.06 | 0.72 | |
W.R (m3/fed./day) | 3.34 | 4.40 | 6.23 | 9.51 | 13.29 | 13.86 | 13.65 | 15.33 | 5.85 | 5.00 | 4.44 | 3.03 | |
W.R (m3/fed. month) | 100.07 | 132.09 | 186.91 | 285.22 | 398.62 | 415.79 | 409.45 | 459.79 | 175.62 | 149.98 | 133.06 | 90.77 | 2937.37 |