Table 2. Summary of raw and quality filtered reads per sample.
| Sample ID | No. of raw reads | No. of reads after filtering | Percentage retained | Percentage removed |
|---|---|---|---|---|
| CS_R1 | 108,687 | 102,478 | 94.29 | 5.71 |
| CS_R2 | 78,990 | 75,446 | 95.51 | 4.49 |
| CS_R3 | 77,801 | 72,750 | 93.51 | 6.49 |
| BC_R1 | 104,458 | 100,389 | 96.10 | 3.90 |
| BC_R2 | 85,042 | 81,632 | 95.99 | 4.01 |
| BC_R3 | 94,548 | 91,020 | 96.27 | 3.73 |
| BO_R1 | 107,481 | 102,599 | 95.46 | 4.54 |
| BO_R2 | 119,154 | 114,554 | 96.14 | 3.86 |
| BO_R3 | 119,167 | 113,237 | 95.02 | 4.98 |
| AC_R1 | 121,854 | 117,154 | 96.14 | 3.86 |
| AC_R2 | 99,215 | 94,663 | 95.41 | 4.59 |
| AC_R3 | 183,420 | 176,056 | 95.99 | 4.01 |
| AO_R1 | 102,121 | 97,991 | 95.96 | 4.04 |
| AO_R2 | 109,799 | 105,793 | 96.35 | 3.65 |
| AO_R3 | 116,991 | 112,508 | 96.17 | 3.83 |
| Total | 1,628,728 | 1,558,270 | 95.67 | 4.33 |
CS: Clean sandy soil; BC: Control oil contaminated bulk soil without barley plants; BO: Barley planted oil contaminated rhizosphere soil; AC: Control oil contaminated bulk soil without alfalfa plants; AO: Alfalfa planted oil contaminated rhizosphere soil.