Table 4.
Results of cell cultures on ultrapure agarose, tryptic soy agar, LB agar, and plate count agar plates with or without excessive nitrate amendments, illustrating the change in order of magnitude of CFUs with nitrate amendments (all variables are scaled by logarithmic transformation). Negative effects of nitrate on microbial growth more than one, two, and three orders of magnitude are labeled with *, **, and ***, respectively.
| Pit Name | Ultrapure Agarose Plates | Tryptic Soy Agar Plates | LB Agar Plates | Plate Count Agar Plates |
|---|---|---|---|---|
| M3 | 0.38 | −2.68 ** | −0.86 | −1.97 * |
| P3 | −0.78 | 0.64 | 0.07 | −3.29 *** |
| Y3 | −1.17 * | 0.66 | −1.28 * | −3.38 *** |
| T03 | 1.08 | −0.40 | −0.23 | −0.27 |
| T43 | −0.05 | −1.29 * | −2.40 ** | −0.73 |
| T53 | 1.27 | 0.16 | 0.93 | −0.25 |
| T63 | 0.64 | −0.07 | 0.33 | −0.90 |