In two-year pot experiment, the effect of liming and application of organic waste materials, like straw and brown coal, on the content of copper, zinc and iron in the cocksfoot grown in soil contaminated with increasing rates of artificially applied nickel was studied. In the first year of the study liming did not affect the content of metals in the test plants, while in the decrease in the concentration of these metals. Application of straw and brown coal resulted in the increase content of Cu and Fe in the test plants in both years of the study, and Zn in the second year. Varying degrees of nickel contamination did not affect the content of Cu and Zn in the biomass of the test plants both years, and it has been shown that increasing the amount of Ni in the soil resulted in decrease of Fe amount in the grass.