The grass minimum temperature is read in the morning daily from a minimum thermometer lying horizontally over ground covered with short grass
2.
This information , together with surface observations of sunshine duration , global solar radiation , soil and grass minimum temperatures , evaporation and potential evapotranspiration , are essential for many fields of studies including climatology , hydrology , agriculture and civil engineering design
3.
This information , together with surface observations of sunshine duration , global solar radiation , soil and grass minimum temperatures , evaporation and potential evapotranspiration , are essential for many fields of studies including climatology , hydrology , agriculture and civil engineering design