Application of different soil conditioners to restorate mine tailings with native (Cistus ladanifer L.) and non-native species (Medicago sativa L.)

Both plant species present an adequate nutritive status except for K deficiency in all cases. Both species contain toxic concentrations of As, Cr and Pb (and Cu also in Medicago) but can be considered as non-accumulators of these elements. In Medicago the concentration of As, Cu and Pb should represent an environmental risk for domestic animals. Liming and adding up to 5% sewage sludge compost effectively assisted soil health and aided plant growth.