Lysimeter

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).

Sources
Ingram, H., A. Coupar, and O. Bragg. (12/2001AD) 2001. “Theory And Practice Of Hydrostatic Lysimeters For Direct Measurement Of Net Seepage In A Patterned Mire In North Scotland”. Hydrology And Earth System Sciences 5: 693-709. doi:10.5194/hess-5-693-2001.