| Nitrogen Source | Colony Diameter (mm) |
| Alanine | 50.5 ± 3.3a |
| Ammonium Acetate | 0.0 ± 0.0d |
| Ammonium Phosphate | 0.0 ± 0.0d |
| Arginine | 0.0 ± 0.0d |
| Calcium Nitrate | 28.9 ± 4.0b |
| Glycine | 54.4 ± 3.8a |
| Histidine | 0.0 ± 0.0d |
| Methionine | 5.0 ± 0.0d |
| Potassium Nitrate | 35.0 ± 3.7b |
| Urea | 5.0 ± 0.0d |