Fig. 2. Average leaf temperature (a), chlorophyll content via SPAD chlorophyll meter (b), quantum efficiency of photosystem II, _PSII (c), and thylakoid electron transport rate, ETR (d) for two water treatments (deficit and adequate) on three measurement dates in 2001 at Shelton, NE. Phenological growth stages for three measurement dates are also shown in the upper portion of graph.