Fig. 1 Relationship between transpiration efficiency (TE) and specific leaf weight (SLW) in switchgrass. Data from mean values of TE and SLW of nine cultivars (A); TE and SLW for cultivars Alamo and Greenville grown under well-watered or water-deficit conditions (B); TE and SLW for Alamo and Greenville grown in solutions containing 0.3, 1.0, or 10 mM N (C)