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Definition of EVAPOTRANSPIRATION
: loss of water from the soil both by evaporation and by transpiration from the plants growing thereon
Origin of EVAPOTRANSPIRATION
evaporation + transpiration
First Known Use: 1938
Loss of water from the soil both by evaporation from the soil surface and by transpiration from the leaves of the plants growing on it. Factors that affect the rate of evapotranspiration include the amount of solar radiation, atmospheric vapor pressure, temperature, wind, and soil moisture. Evapotranspiration accounts for most of the water lost from the soil during the growth of a crop. Estimation of evapotranspiration rates is thus important in planning irrigation schemes.