The effect of liming and an addition of waste organic materials to soil on the contents of copper and zinc in cock`s-foot (Dactylis glomerata L.) cultivated on soil contaminated to various degrees with nickel was studied in a pot culture experiment. Plants from four cuts of grass were analysed. Liming resulted in a significant reduction of copper content in the plant test, without any distinct differentiation in zinc content. The studies showed no effect of varying amounts of nickel in the soil on zinc content in the orchard grass, and with increasing soil contamination with nickel the content of cooper in the grass decreased, which may be an evidence of antagonism of the two micronutrients.