Activity concentration of radionuclides present in soil and transfer factor (TF) in plants are very useful parameters in accessing the level of radioactive contamination in farmlands and in plants cultivated in such farmlands. In this research work the activity concentration of naturally occurring radionuclides in farm soil and Afang leaves planted in the soil were measured using high purity Germanium (HPGe) detector. In soil the mean activity concentration of 238U was58.34±3.41Bq/kg,226Ra had mean value of 26.98±1.39Bq/kg, 232Th had 45.06±2.38Bq/kg, while that of 40K was30.91±1.71Bq/kg. The mean activity concentration of 238U, 226Ra, 232Th and 40Kin Afang leaves were 13.29±1.28Bq/kg, 4.85±0.79Bq/kg, 6.80±0.45Bq/kg and 459.65±25.64Bq/kg respectively.Transfer factors of 238U, 226Ra, 232Th and 40K were 0.22, 0.22, 0.17 and 31.21 respectively from soil to Afang leaves. In soil mean activity concentration of226Ra and 40K were within recommended limits while themean values obtained for activity concentration of 238U and 232Th in soil from most sampling locations were observed to be above world recommended values.Mean activity concentration of 238U, 226Ra and 232Th in afang leaves were within permissible values except for 40K.High values of TF were also obtained for 40K in all afang leaves samples, however 40K is known to be naturally abundant in soil and plants.Values of transfer factor obtained for 238U, 226Ra and 232Th in all afang samples were all below unity, which is within the recommended limits and therefore safe for consumption
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