Table 1.

Effect of fertilization on net photosynthesis (Pn), evaporation rate (E), on water use efficiency (WUE) and on chlorophyll content (mg ^* cm⁻²) of Styphnolobium japonicum Schott trees (Pn = μmol m⁻² s⁻¹ of CO₂; Evaporation rate = mmol m⁻² s⁻¹ of H₂O; WUE = Pn/Evaporation rate). Data on leaf gas exchange are the average of three sampling dates in the first and in the second year and five in the third year.