A lysimeter is a measuring device which can be used to measure the amount of actual evapotranspiration which is released by plants, usually crops or trees. By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated.
The amount of water lost by evapotranspiration can be worked out by calculating the difference between the weight before and after the precipitation input.
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