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The paper deals with distribution of 210Po and 210Pb radionuclides in a vertical profile of illuviated soil, in Madikeri taluk of Coorg district, Karnataka, India. The activity concentration of 210Po and 210Pb radionuclides was determined using radioanalytical method and the dependence of these radionuclides on physico-chemical parameters of soil was also investigated through a statistical study. In all the layers of the soil in a vertical profile, the 210Po nuclides were found to be in disequilibrium with 210Pb. The frequency distribution of 210Po and 210Pb radionuclides was analysed using Kolgomorov–Smirnov test. [ABSTRACT FROM AUTHOR]