Above all, the highly significant interaction between soil kind and copper contamination indicated that in zinc-polluted soil the application of copper caused a larger reduction of the respiration rate than in unpolluted soil (Fig. 2a).
Above all, the highly significant interaction between soilkind and copper contamination indicated that in zinc-pollutedsoil the application of copper caused a larger reductionof the respiration rate than in unpolluted soil (Fig. 2a).