Midday leaf water potential (Ψleaf) under different experimental water regimens (field experiment; means ± s.e., n = 3). Different lower-case letters indicate significant differences between means (Fisher's LSD; P < 0·05). Soil water potentials at 20-cm depth, 58, 69, 77 and 89 d after sowing (DAS), were –10, –8, –7 and –9 kPa in the saturated treatment and –20, –13, –12 and –11 kPa in the aerobic treatment, respectively.
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