Soil evaporation is calculated from the whole surface
area.
Based on Drip Irrig
Soil evaporation is calculated separately from the area
irrigated by the emitters and the rest of the soil.
Based on Drip Irrig and Radiation
Soil evaporation is calculated separately from the area
irrigated by the emitters and the rest of the soil. Radiation interception
by the plant canopy is accounted for.