Operational determination of daily actual evapotranspiration of irrigated tomato crops under Mediterranean conditions by one-step and two-step models: Multiannual and local evaluations

The performance of two operational models for calculating daily actual evapotranspiration (ET) was presented in this study. Both models used only climatic variables collected by standard weather stations. The analysis was performed during 2000, 2001 and 2006 on three irrigated varieties of tomato crop cultivated in three different plots located in the Province of Foggia (Southern Italy). The first model (AL model) was a two-step model proposed by Allen et al. (1998). The second model (RK model) was a one-step model proposed by Rana and Katerji (2009).