Example $1$

Calculate the reference evapotranspiration rate using FAO

Penman and Monteith method based on the following

information:

Min Daily Air temperature $=15C$;

Max Daily Air Temperature $=35C$;

Relative Humidity $=40\%$

$,$ Wind speed @ $2$ m height $=2\mathrm{.}5\frac{m}{s}$;

Neglect soil heat flux;

$Pa=10\mathrm{.}33m$ of water

$,$ Net Radiation day $\{\frac{\text{:}}{m^2})$