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The paper presents the results of the experiments on a sterile dump resulted from surface mining of lignite in Rovinari, Gorj County, where, was been tested the effect of a variety of fertilizer as: liquid fertilizers based on humates extracted from lignite, complex mineral fertilizer (N105 P105 K105 and N150 P150 K150), farmyard manure (20, 40 and 60 t/ha), compost (20, 40 and 60 t/ha), and the mixture of the two types of organic fertilizers with mineral fertilizer. Two test plants, corn, and sunflowers have been...