The ETo estimated from pan (ETo-pan

The ETo estimated from pan (ETo-pan) when
compared with ETo-ref specify a good agreement
between the two methods. As the values of RMSE was
quite low, less than 0.250 mm/day and MBE value close
to zero. Moreover, the pan evaporation method
underestimates the ETo than ETo-ref, only by a
magnitude of 6.94%. This may be because the PenmanMonteith

equation is the most precise method for
calculation of ETo (Garcia et al. 2004, Gavilan et al.