Table 1 Distribution of radioactivity in 0–5 cm top soil layer (% aR) after 1 M NaOH extraction
Percent of applied radioactivity by days after treatment | ||||||
|---|---|---|---|---|---|---|
1 | 183 | 365 | 578 | 730 | 913 | |
Extractable | 98.1 ± 1.6 | 102.6 ± 3.3 | 83.4 ± 3.7 | 79.6 ± 1.3 | 62.9 ± 2.3 | 63.9 ± 1.1 |
Non-extractable residues | 8.0 ± 1.4 | 11.3 ± 1.4 | 10.8 ± 0.9 | 10.8 ± 0.8 | 8.4 ± 1.2 | 8.7 ± 1.1 |
Recoverya | 106.1 | 113.9 | 94.2 | 90.4 | 71.3 | 72.6 |