Comparison between half-hourly estimated evapotranspiration by the dual-source with the big-leaf (<i>λET<sub>1</sub></i>) and dual-leaf models (<i>λET<sub>2</sub></i>) versus measured <i>λET</i> by eddy covariance (<i>λET<sub>m</sub></i>) during the entire growth period of maize in (a and b) 2009 and (c and d) 2010.

<p>Comparison between half-hourly estimated evapotranspiration by the dual-source with the big-leaf (<i>λET<sub>1</sub></i>) and dual-leaf models (<i>λET<sub>2</sub></i>) versus measured <i>λET</i> by eddy covariance (<i>λET<sub>m</sub></i>) during the entire growth period of maize in (a and b) 2009 and (c and d) 2010.</p>