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The activity concentrations of naturally occurring radionuclides ( 40 K, 226 Ra 232 Th) in nine organic fertilizers were measured using NaI (Tl) gamma ray spectrometry. The results show that 40 K mean activity concentration was 305.33±0.196Bqkg -1 ranging from 120Bq/kg to 907 Bqkg -1 , 232 Th mean concentration was 45.04Bqkg -1 ranging from 14.66 Bq/kg to 60.20Bqkg -1 . While 226 Ra mean concentration was 24.87±0.02Bqkg -1 with a range of 12.83 to 65.69Bqkg -1 . Radiological hazard indices were calculated and the mean air absorbed dose rate was 51.59nGyh -1 it ranged from 30.33 to 101.23nGyh -1 . The annual effective dose rate averaged 61.33µSvy -1 (0.061) which is lower than the world average (0.07µSvy -1 ) it ranged from 33.39 to 124.51μSvy -1 . The Raeq was 112.90Bqkg -1 which is far below the 370Bqkg -1 maximum.The Hex and Hin averaged 0.31 and

Radiological Analysis of Selected Organic Fertilizers in Zaria Local Government Area Council, Kaduna State, Nigeria: Possible Health Implications