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(A) Photosynthetic rate (A), (B) stomatal conductance (gs) and (C) photosynthetic water use efficiency (WUE; A/gs) of Cullen cinereum, Kennedia nigricans and Lotus australis 1 week before the second harvest when grown at low, medium or high temperature with addition of 60 mg kg−1 of P as FePO4 (i.e. with ten fully expanded main stem leaves) (mean ± s.e., n = 4).
