Fig. 4.

Mean transpiration efficiency (TE) across maize, sorghum, and pearl millet grown in different soil types in lysimeters in the field under well-watered conditions. (A) Experiment 3 with relatively high vapor pressure deficit (VPD) and (B) Experiment 4 with relatively low VPD (Fig. 1). Data are means (±SE) of all the species, based on the means of three genotypes in each one (Table 1), with five replicate plants being sampled to determine the mean for each genotype. Bars indicating the LSD at P<0.01 between the soil treatments are shown.