 This study compares actual evapotranspiration, ETA, measurements by a set of six-wayable lysimeters. ETA estimates obtained with the eddy.covariance, EC, method, and evapotranspiration calculated with the full-form .Penman-Montieth equation, ETPM, for the Rolls-Broch site in the Eiffel. The highest agreement and smallest relative differences between both methods are found in summer. This article was authored by S. Kebler, H.J. Hendricks-Franson, T. Putz, and others.