Abstract
The ex-nickel mining area in Southeast Sulawesi is planned to be developed as the center of the economic activities. Concerns regarding the negative effect of the past nickel mining activities must be considered. This study aimed to develop technical improvements and recovery of soil fertility mining through phytoremediation. The study used a randomized block design (RBD) consisted of two factors. The first factor was application of rhizobacteria, consisting of two levels, i.e., without rhizobacteria (R0) and with rhizobacteria (R1). The second factor was cover crop types, consisting of four types viz; Centrosema pusbences Benth. (C1), Calopogonium mucunoides (C2), Crotalaria sp. (C3) and Amaranthus spinosus (C4), with three replications. The results show that the cover crop of Centrosema pubescens Benth, Calopogonium mucunoides and Crotalaria sp were able to improve the soil fertility.
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