Michigan Environmental Education Curriculum
The Watershed Concept

Transpiration is the process where water contained in liquid form in plants is converted to vapor and released to the atmosphere. Much of the water taken up by plants is released through transpiration. It is difficult to separate the processes of evaporation and transpiration, so this transfer of water is sometimes simply called evapotranspiration. The U.S. EPA estimates that an acre of corn transpires 4000 gallons of water each day.

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