Enter crop coefficient Kc and reference evapotranspiration ET₀ to compute crop evapotranspiration ETc = Kc × ET₀ and convert it into daily irrigation water use by area.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Crop evapotranspiration (ETc) | ETc = Kc × ET0 | FAO-56 (1998) |
| Reference ET0 (Penman-Monteith) | Penman-Monteith equation | FAO-56 Eq.6 |
| Crop coefficient Kc | Kc varies by growth stage | FAO-56 Table 11 |
作物需水量计算器是一款农业种植领域的在线工具。农业种植工具,帮助计算种植参数与产量。