The evapotranspiration means the amount of water no longer available in the soil due to evaporation and transpiration. Transpiration is the movement of liquid through a plant then released through the stomata of the plant as water vapor. There are several methods for estimating evapotranspiration, the most common are the Penman Monteith equation and Bowen ratio technique. Using Finapp probes, it is possible to evaluate the result of actual evapotranspiration, i.e., soil moisture loss.