Table 2.
Effect of the addition of nitrate on NA
| Sampling location depth (cm) | % decrease in NA | P valuea |
|---|---|---|
| 0–5 | 5.7 | 0.53 |
| 5–10 | 8.4 | 0.31 |
| 10–15 | −9.2 | 0.07 |
a
Determined by a two-tailed t test.
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