Fig. 4. (a) Canopy stomatal conductance (g_c), (b) latent heat fluxes (LE), and (c) CO₂ fluxes measured (squares) or gap-filled (diamonds) and modeled (lines) over irrigated and rainfed maize during DOY 221–230 (9–18 August) 2003 at Mead, NE. Positive and negative values denote downward and upward fluxes, respectively.