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Comparing electrical current with voltage gradient and soil pH for all tests.
| Run | Current, A | Voltage gradient, V/cm | pH |
|---|---|---|---|
| R6 | 3.02 | 1 | 12.9 |
| R9 | 2.65 | 1 | 12.6 |
| R3 | 2.25 | 1 | 12.6 |
| R4 | 2.04 | 1 | 12.7 |
| R2 | 1.32 | 0.6 | 10.9 |
| R1 | 1.17 | 0.6 | 10.2 |
| R10 | 1.12 | 0.6 | 11.9 |
| R5 | 1.03 | 0.6 | 11.2 |
| R11 | 0.61 | 0.6 | 12.0 |
| R8 | 0.21 | 0.2 | 9.8 |
| R12 | 0.15 | 0.2 | 8.3 |
| R7 | 0.14 | 0.2 | 8.1 |
| R13 | 0.13 | 0.2 | 10.4 |
