Open Access
Table 2
Comparison of the average activity concentration of 238U, 226Ra, 232Th, and 40K recorded in literature for different region soil samples.
| Country | Activity concentration (Bq kg−1) | Reference | |||
|---|---|---|---|---|---|
| 238U | 226Ra | 232Th | 40K | ||
| World average | 35 | 32 | 45 | 420 | (UNSCEAR, 2000) |
| Indian Average | 31 | 29 | 64 | 400 | (UNSCEAR, 2000) |
| Chikmagalur district | – | 36 | 51 | 566 | (Srinivasa et al., 2022) |
| Bangalore rural | – | 40 | 93 | 750 | (Ningappa et al., 2008) |
| Coastal Karnataka | – | 35 | 29 | 117 | (Narayana et al., 2001) |
| Bangalore | – | 26 | 53 | 635 | (Prasad et al., 2008) |
| Mandya | – | 40 | 72 | 639 | (Shivakumara et al., 2014) |
| Granite region of Karnataka | – | 28 | 60 | 117 | (Sannappa et al., 2010) |
| Kaiga | – | 31 | 27 | 159 | (Karunakara et al., 2001) |
| Gogi region | – | 36 | 85 | 859 | (Yashodhara et al., 2011) |
| Uttara Kannada district | – | 34 | 45 | 198 | (Suresh et al., 2022) |
| North Karnataka | – | 18 | 38 | 546 | (Kerur et al., 2011) |
| Tumkur and Ramanagara district | – | 41 | 86 | 869 | (Srilatha et al., 2015) |
| Kolar district (KGF) | – | 27 | 63 | 818 | (Umesh Reddy et al., 2017) |
| Hassan District | 42 | 39 | 58 | 592 | Present study |
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