Region/ Country | Number of Samples | Types | Ranges Fe (mg/kg) | Mean Fe (mg/kg) | Ranges Zn (mg/kg) | Mean Zn (mg/kg) | References |
Chile | 12 | TSP | 5200.0 - 6800.0 | 6000.0 | 43.0 - 883.0 | 600.0 | [29] |
DAP | 7100.0 - 11,000.0 | 9100.0 | 38.1 - 44.5 | 41.3 | |||
Egypt | - | Superphosphate | 7600.0 | 107.80 | [28] | ||
Europe (12 Countries) | 196 | Phosphate | - | - | - | 166.0 | [27] |
Bangladesh | 10 | TSP | 2963.81 - 19,615.84 | 6793.93 | 243.33 - 472.52 | 346.73 | This study |
DAP | 18,398.23 - 23,403.79 | 20,901.01 | 348.14 - 4426.17 | 2387.15 | |||
Compost | 13,206.78 - 24,484.78 | 17,067.95 | 312.73 - 3359.90 | 1511.22 | |||
Ranges Sc (mg/kg) | Mean Sc (mg/kg) | Ranges Sm (mg/kg) | Mean Sm (mg/kg) | ||||
Pakistan | - | SSP | - | - | - | 2.02 | [41] |
DAP | - | - | - | 12.0 | |||
Brazil | - | SSP | 24.6 | 122.0 | [36] | ||
Brazil | - | MAP | - | 43.0 | [41] | ||
TSP | - | 89.0 | |||||
Egypt | - | Superphosphate | - | 3.99 | - | - | [28] |
Bangladesh | 10 | TSP | 5.74 - 11.80 | 7.92 | 6.38 - 26.69 | 14.807 | This study |
DAP | 6.97 - 8.42 | 7.694 | 6.58 - 7.22 | 6.902 | |||
Compost | 3.50 - 7.09 | 4.785 | 2.19 - 3.88 | 3.075 |