Fig. 2From: Improvement of growth performance of Amorpha fruticosa under contrasting regime of water and fertilizer in coal-contaminated spoils using response surface methodologyResponse surface plots showing the effect of soil-water (W), nitrogen (N) and phosphorus (P) on the leaf water potential (LWP) (a), photosynthesis rate (Pn) (b, c), transpiration rate (Tr) (d), stomatal conductance (Gs) (e), water use efficiency (WUE) (f), and total chlorophyll (total Chl) content (g-h)Back to article page