AtmPres                 Atmospheric Pressure (P)
CSSRad                  Clear-Sky Solar Radiation (R_so)
DD2Rad                  Degree to Radian Converter
DH                      Daylight Hours (N)
ET_c                    Crop Evapotranspiration (ET_c)
ETo_FPM                 FAO Penman-Monteith Reference
                        Evapotranspiration (ETo) Equation
ETo_Hrg                 Hargreaves Reference Evapotranspiration (ETo)
                        Equation
ETo_Pan                 Evapotranspiration based on Pan Evaporation
                        Method
EarSunDis               Inverse Earth-Sun Distance (d_r)
EffPrec                 Effective Monthly Precipitation (P_eff)
ExRad                   Extraterrestrial Radiation for Daily Periods
                        (R_a)
FAO56-package           A package for computing the crop
                        evapotranspiration and evapotranspiration rate
                        from the reference surface by FAO
                        Penman-Monteith equation
JulDate                 Julian Date
KC_Perennial_Vegetables
                        Crop Coefficients (Kc) of Perennial Vegetables
Kc_Cereals              Crop Coefficients (Kc) of Cereals
Kc_Fibre_Crops          Crop Coefficients (Kc) of Fibre Crops
Kc_Forages              Crop Coefficients (Kc) of Forages
Kc_Fruit_Trees          Crop Coefficients (Kc) of Fruit Trees
Kc_Grapes_and_Berries   Crop Coefficients (Kc) of Grapes and Berries
Kc_Legumes              Crop Coefficients (Kc) of Legumes
Kc_Oil_Crops            Crop Coefficients (Kc) of Oil Crops
Kc_Roots_and_Tubers     Crop Coefficients (Kc) of Roots and Tubers
Kc_Small_Vegetables     Crop Coefficients (Kc) of Small Vegetables
Kc_Special              Crop Coefficients (Kc) of Special Areas
Kc_Sugar_Cane           Crop Coefficients (Kc) of Sugar Cane
Kc_Tropical_Fruits_and_Trees
                        Crop Coefficients (Kc) of Tropical Fruits and
                        Trees
Kc_Vegetables_Cucumber_Family
                        Crop Coefficients (Kc) of Cucumber Family
                        Vegetables
Kc_Vegetables_Solanum_Family
                        Crop Coefficients (Kc) of Solanum Family
                        Vegetables
Kc_Wetlands_Temperate_Climate
                        Crop Coefficients (Kc) of Wetlands Temperate
                        Climate
MSVP                    Mean Saturation Vapour Pressure (e_s)
MeanRH                  Mean Relative Humidity (RH_mean)
MeanTemp                Mean Daily Air Temperature (T_mean)
NLRad                   Net Longwave Radiation (R_nl)
NRad                    Net Radiation (R_n)
NSRad                   Net Shortwave Radiation (R_ns)
PanCoef                 Pan Coefficient (K_p)
PsyCon                  Psychrometric Constant (gamma)
RelHum                  Relative Humidity (RH)
SatVP                   Saturation Vapour Pressure at a specific Air
                        Temperature (e0T)
SlpSVPC                 Slope of Saturation Vapour Pressure Curve
                        (Delta)
SolDec                  Solar Declination (delta)
SolRad                  Solar Radiation (R_s)
SunHA                   Sunset Hour Angel (omega_s)
WndSp2m                 Wind Speed at the height 2 m Above Ground
                        Surface
